Maintenance Manual HTCM-006

Table 5-8. Troubleshooting 46 HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL HTCM-006 UH-1H MAIN ROTOR BLADE Change Letter: D Change Date: 01/03/2020 12902 South Broadway • Los Angeles, California 90061 Sheet 6 of 114 – HTC Proprietary Data Not to be Distributed 204P2100-101 AND -103 MAIN ROTOR BLADE ASSEMBLY: FOR TH-1F MODELS (T.O. 1H-1(U)F-2-1), FOR UH-1F MODELS (T.O. 1H-1(U)F-2-1), AND FOR UH-1P MODELS (T.O. 1H-1(U)F-2-1) 47 I. General Information 47 1-1. General Information 47 1-13. Leading Particulars 47 Table 1-1. Leading Particulars 47 1-14. Station Locations 47 Figure 1-2. Station Locations 47 1-22. Preservation 48 1-28. Long Term Preservation 48 1-31. Drive System – Preservation (Inoperable Engine) 48 1-40. Depreservation 48 1-42. Long Term Depreservation 48 1-52. Main Rotor Assembly 48 1-53. Extreme Climactic Environmental Maintanence 49 1-54. Extremes in Temperature 49 II. Ground Handling, Servicing, and Lubrication Instructions 50 2-1. Ground Handling 50 2-2. General 50 2-3. Towing 50 2-5. Towing 50 Figure 2-1. Towing and Parking 50 2-34. Parking 50 2-35. Parking Procedures 51 2-36. Anchoring and Mooring 51 2-37. Mooring Procedures 51 Figure 2-14. Typical Mooring 51 HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL HTCM-006 UH-1H MAIN ROTOR BLADE Change Letter: D Change Date: 01/03/2020 12902 South Broadway • Los Angeles, California 90061 Sheet 7 of 114 – HTC Proprietary Data Not to be Distributed 2-38. Blade Tie Down 51 2-39. Jacking 51 2-41. Jacking Procedure 51 2-43. Jacking for Weighing 52 2-47. Hoisting 52 2-48. Maintenance Hoist 52 Figure 2-15. Jacking-Hoisting-Leveling 52 2-56. Cold Weather Ground Check 52 2-57. Servicing 52 2-58. General 52 2-70. Air Transportability 53 2-71. General 53 2-74. Torque Requirements 53 2-75. Torqueing Instructions 53 2-76. Torqueing Limits 53 Table 2-1. Standard Torque Values 53 Figure 2-24. Torque Values 53 2-77. Correct Recommended Torque 54 2-78. Torque – Tightening Procedures 54 2-79. Use of Extension Wrench (Crowfoot) 54 2-80. Measuring Effective Length of Crowfoot Wrench 54 Figure 2-26. Torque Values for Studs 54 2-81. Determination of Gage Reading when using a Crowfoot Wrench 54 Figure 2-27. Decimal Equivalent Conversion Table 54 Figure 2-28. Temperature Conversion Chart (Fahrenheit to Centigrade) 55 Figure 2-29. Measuring Effective Length of Extension Wrench 55 Figure 2-30. Torque Application using Extension Wrench 55 2-86. Materials Required 55 Table 2-3. Materials Required 55 Figure 2-34. Special Tools and Equipment 55 2-87. Special Tools and Equipment 56 Table 2-4. Special Tools and Equipment 56 HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL HTCM-006 UH-1H MAIN ROTOR BLADE Change Letter: D Change Date: 01/03/2020 12902 South Broadway • Los Angeles, California 90061 Sheet 8 of 114 – HTC Proprietary Data Not to be Distributed VII. Main and Tail Rotor and Flight Controls 57 7-1. Main Rotor Hub and Blade Assembly 57 7-2. Description 57 Figure 7-1. Main Rotor Group 57 Figure 7-2. Rotor System Torque Values 57 Figure 7-3. Main Rotor Hub and Blade Assembly 57 7-3. Removal – Main Rotor Hub and Blade Assembly 57 Figure 7-4. Grip Positioning Links 57 7-4. Alternate Removal – Main Rotor Hub and Blade Assembly 58 7-4A. Removal – of Pitch Change Link Assembly 58 7-5. Removal – Main Rotor Blades 58 7-6. Inspection and Repair Main Rotor Blades 58 7-7. Inspection and Repair Drag Brace Assembly 58 Figure 7-5. Blade Removal 58 7-8. Covering Leading Edge of Main Rotor Blades 58 Figure 7-8. Rotor Blade Retention Bolt Extracting Fixture 59 7-17. Reassembly after Replacement of Main Rotor Blade Retention Straps 59 7-19. Installation - Main Rotors 59 7-20. Aligning - Main Rotors 59 Figure 7-16. Main Rotor Blade Alignment 59 Figure 7-17. Blade Alignment Jig Assembly 59 7-21. Installation - Main Rotor Hub and Blade Assembly 59 Figure 7-18. Pitch Change Link Assembly 60 7-22. Alternate Installation - Main Rotor Hub and Blade Assembly 60 7-23. Setting Minimum Blade Angle - Main Rotor 60 7-24. Clean Main Rotor Blades 60 7-25. Operational Check of Main Rotor 60 7-26. Vibrations 60 7-27. Extreme Low Frequency Vibration 60 7-28. Low Frequency Vibration 61 7-29. Medium Frequency Vibration 61 7-30. High Frequency Vibration 61 7-30A. Vibration Analysis and Troubleshooting 61 HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL HTCM-006 UH-1H MAIN ROTOR BLADE Change Letter: D Change Date: 01/03/2020 12902 South Broadway • Los Angeles, California 90061 Sheet 9 of 114 – HTC Proprietary Data Not to be Distributed 7-31. Tracking and Balancing Main and Tail Rotor Assembly 62 7-32. Vibrex System Tracking and Balancing Main and Tail Rotor Blades and Hubs 62 7-33. Description of Equipment 62 Table 7-1. Tools and Equipment Required 62 Figure 7-20. Description and Specification of the Vibrex System 62 Figure 7-20A. Spectrum Analyzer, Model 192 62 Figure 7-21. Vibrex B Equipment 62 Figure 7-22. Vibrex / Airframe Interface 63 Figure 7-23. Phase Relationships for Improperly and Properly Tuned Filters 63 Figure 7-24. Typical Charts 63 Figure 7-25. Accurate Charts 63 Figure 7-26. Balance Chart Clock Angle Corrector Instruction Sheet 63 Figure 7-27. Balance Chart Clock Angle Corrector 63 Figure 7-28. Reclocked Chart 63 7-34. Operating Equipment 64 Figure 7-29. Installation of Interrupter on Swashplate 64 Figure 7-30. Installation Magnetic Pickup 64 7-35. Installation of Equipment 64 Figure 7-31. Installation of Interrupter 64 Figure 7-32. Adjustment of Magnetic Pickup Clearance 64 Figure 7-33. Installation of Magnetic Pickup and Accelerometer Cable 64 Figure 7-34. Installation of Retro-Reflective Tape to Main Rotor Tip Targets 65 Figure 7-35. Installation of Tip Targets 65 Figure 7-36. Installation of Accelerometer and Bracket, PN 3382 65 Figure 7-37. Installation of Reflective Target Tape to Blade Grip 65 Figure 7-38. Installation of Retro-Reflective Target Tape to Blade Tip 65 7-36. Hover Tracking Main Rotor 65 Figure 7-39. Stopped Target Image Tail Rotor 65 Figure 7-40. Hover and Ground Track Blade Pattern 66 7-37. Dynamic Balancing of Main Rotor 66 7-38. Inflight Tracking Main Rotor Blades 66 Figure 7-42. Balance Chart Main Rotor (Typical) 66 Figure 7-43. Inflight Track Blade Pattern 66 HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL HTCM-006 UH-1H MAIN ROTOR BLADE Change Letter: D Change Date: 01/03/2020 12902 South Broadway • Los Angeles, California 90061 Sheet 10 of 114 – HTC Proprietary Data Not to be Distributed 7-41. Troubleshooting Vibration using Vibrex B 66 7-42. Removal of Equipment 66 7-43. Tracking Flag Method 67 Figure 7-44. Tracking Main Rotor 67 7-44. Vibration Check and Adjustment of Main Rotor 67 Figure 7-45. Main Rotor Tracking Procedure 67 Figure 7-46. Rotor Smoothing Procedure 67 7-45. Sweeping Blade of Main Rotor 67 7-46. Autorotation RPM Adjustment of Main Rotor 67 Figure 7-47. Troubleshooting Lateral Vibration 68 Figure 7-48. Trim Tab Bender and Gage Application 68 Figure 7-49. Tracking Flag 68 7-47. Adjusting for Collective Forces 68 7-48. Adjustment - Collective Pitch Force – Main Rotor Hub and Blade Assembly 68 Figure 7-50. Collective Pitch Retention Strap Adjustment 68 7-49. Resetting Tension Torsion Straps to Initial Settings 68 7-50. Resetting Main Rotor Grip Strap 69 7-51. Troubleshooting Rotors and Controls 69 Table 7-2. Troubleshooting Rotors and Controls 69 7-101. Packaging and Preservation of Components 69 7-102. Installing Main Rotor Blades in Shipping Containers 69 HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL HTCM-006 UH-1H MAIN ROTOR BLADE Change Letter: D Change Date: 01/03/2020 12902 South Broadway • Los Angeles, California 90061 Sheet 11 of 114 – HTC Proprietary Data Not to be Distributed 204P2100-101 AND -103 MAIN ROTOR BLADE ASSEMBLY: FOR 204B MODELS (BHT-204B-M&O-1) 70 Introduction 70 1. Use of the Manual 70 2. Bulletins 70 3. Consumable Materials 70 4. Special Tools 70 5. Torques 70 6. Terminology 71 7. Warnings, Cautions, and Notes 71 8. Use of Procedural Words 71 9. Wear Limits 71 10. Standard Practices 71 11. Replacement Parts and Assemblies 71 Section I. General Information 72 Figure 1-1. 204B Helicopter 72 1-1. General Information 72 1-2. Description 72 1-3. General 72 1-7. Main Rotor 72 1-20. Helicopter Dimensions 72 1-21. Ground Handling 73 Figure 1-2. Three-View Dimensional Diagram 73 Figure 1-3. Station Line Diagram 73 Figure 1-4. Ground Handling (Hoisting, Jacking, Leveling, and Towing) 73 1-29. Parking – Normal Conditions 73 1-30. Parking – Turbulent Conditions 73 1-31. Mooring 73 Figure 1-5. Parking and Mooring 74 HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL HTCM-006 UH-1H MAIN ROTOR BLADE Change Letter: D Change Date: 01/03/2020 12902 South Broadway • Los Angeles, California 90061 Sheet 12 of 114 – HTC Proprietary Data Not to be Distributed 1-32. Helicopter Storage 74 1-33. Environmental Conditions 74 1-34. Flyable Storage 74 1-35. Short Term Storage 74 1-36. Intermediate Storage 74 1-67. Maintenance Hoist 74 1-78. Inspection 75 1-79. Daily Inspection 75 1-79. Daily Inspection 75 1-80. 100 Hour Inspection 75 1-81. 1000 Hour Inspection 75 1-82. 3000 Hour Inspection 75 1-83. 1000 Hour Component Overhaul 75 1-84. 1500 Hour Component Overhaul 76 1-85. 2000 Hour Component Overhaul 76 1-86. 2400 Hour Component Overhaul 76 1-86A. 2500 Hour Component Overhaul 76 1-87. Between 5 and 10 Hours of Flight After Installation 76 1-88. Each 10 Hours of Component Operation 76 1-89. Each 25 Hours of Component Operation 76 1-90. Between 25 and 30 Hours of Flight After Installation 77 1-91. Each 50 Hours or 15/30 Days 77 1-92. 100 Hours After Initial Installation of Tailboom 77 1-93. Each 100 Hours 77 1-94. Each 100 Hours or 3 Months, Whichever Occurs First 77 1-95. Each 300 Hours or 3 Months, Whichever Occurs First 77 1-96. Each 500 Hours or 12 Months, Whichever Occurs First 77 1-96A. Each 24 Months 78 1-96B. Deleted 78 1-97. Each 1200 Hours or 24 Months, Whichever Occurs First 78 1-98. Hard Landing 78 1-99. Sudden Stoppage - Power On or Off 78 1-100. Overspeed 78 1-101. Overtorque 78 HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL HTCM-006 UH-1H MAIN ROTOR BLADE Change Letter: D Change Date: 01/03/2020 12902 South Broadway • Los Angeles, California 90061 Sheet 13 of 114 – HTC Proprietary Data Not to be Distributed 1-102. Compressor Surge or Stall 79 1-103. Lightning Strikes 79 1-104. Magnetic Compass Malfunction 79 1-105. Overhaul Evaluation Criteria 79 1-106. Airworthiness Limitations Schedule 79 Table 1-2. Airworthiness Limitations Schedule 79 Section II. Main Rotor Hub and Blade Assembly 80 2-1. Main Rotor Hub and Blade Assembly 80 2-2. Description 80 2-3. Removal – Main Rotor Hub and Blade Assembly 80 2-4. Main Rotor Blades 80 2-5. Description 80 2-6. Removal – Main Rotor Blades 80 Figure 2-1. Main Rotor Assembly 80 Figure 2-2. Grip Positioning Links 81 2-7. Installation – Main Rotor Blades 81 Figure 2-3. Removing Rotor Blades 81 Figure 2-4. Main Rotor Blade Retention Bolt Extracting Fixture 81 2-8. Preventative Maintenance – Main Rotor Blades 81 2-9. Leading Edge Protection – Main Rotor Blades (Polyurethane Tape) 81 2-10. Daily Inspection – Main Rotor Blades 81 2-11. 1000 Hour Inspection and Repair – Main Rotor Blades 82 Figure 2-5. Main Rotor Blade Repair 82 2-12. Conditional Inspection – Main Rotor Blades 82 2-13. Inspection – Main Rotor Blades 82 2-14. Field Repairs – Main Rotor Blades 82 2-15. Trim Tab Replacement – Main Rotor Blade 82 Figure 2-6. Trim Tab Replacement 82 2-16. Main Rotor Blade Splice Cover 83 2-17. Installation – Main Rotor Blade Splice Cover 83 2-18. Preservation, Storage, and Blade Packaging 83 HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL HTCM-006 UH-1H MAIN ROTOR BLADE Change Letter: D Change Date: 01/03/2020 12902 South Broadway • Los Angeles, California 90061 Sheet 14 of 114 – HTC Proprietary Data Not to be Distributed 2-19. Main Rotor Hub 83 2-43. Balancing – Main Rotor Hub Assembly 83 Figure 2-34. Balancing Main Rotor Hub 83 2-44. Installation – Main Rotor Blades 83 2-45. Alignment – Main Rotor Blades 84 2-46. Installation – Main Rotor Hub and Blade Assembly 84 Figure 2-35. Main Rotor Blade Alignment 84 2-47. Torque Limits – Main Rotor 84 2-48. Maintenance Operational Check - Main Rotor 84 2-49. Tracking – Main Rotor Blades 84 Figure 2-36. Rotor System Torque Limits 84 Figure 2-37. Tracking Main Rotor Blades 85 Figure 2-38. Trim Tab Bender and Gage Application 85 2-50. Spanwise Balance Check 85 2-51. Chordwise Balance Check 85 2-52. Autorotation RPM Check 85 2-53. Collective Pitch Force Check and Adjustment 85 Figure 2-39. Collective Force Pitch Adjustment 85 2-54. Main Rotor Hub Sealing 86 HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL HTCM-006 UH-1H MAIN ROTOR BLADE Change Letter: D Change Date: 01/03/2020 12902 South Broadway • Los Angeles, California 90061 Sheet 15 of 114 – HTC Proprietary Data Not to be Distributed 204P2100-101 AND -103 MAIN ROTOR BLADE ASSEMBLY: FOR 205A MODELS (BHT-205A1-MM-1) AND FOR 205A-1 MODELS (BHT-205A1-MM-1) 87 Chapter 1. Introduction 87 1-1. General 87 1-2. Helicopter Description 87 Figure 1-1. Model 204A-1 Helicopter (Typical) 87 1-3. Use of the Manual 87 1-4. Bulletins 87 1-5. Consumable Materials 87 1-6. Special Tools 89 1-7. Torques 89 1-8. Terminology 89 1-9. Warnings, Cautions, and Notes 89 1-10. Use of Procedural Words 89 1-11. Wear Limits 89 1-12. Standard Practices 89 1-13. Replacement Parts and Assemblies 90 Chapter 4. Airworthiness Limitations 91 4-1. Airworthiness Limitations Schedule 91 Chapter 5. Inspections 92 Inspections 92 5-1. General 92 5-2. Inspection Requirements 92 5-3. Crash Damage 92 5-4. Types of Inspections 92 5-5. Definitions 92 5-6. Inspection and Overhaul Tolerance 92 HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL HTCM-006 UH-1H MAIN ROTOR BLADE Change Letter: D Change Date: 01/03/2020 12902 South Broadway • Los Angeles, California 90061 Sheet 16 of 114 – HTC Proprietary Data Not to be Distributed Scheduled Inspections 93 5-7. Scheduled Inspections 93 5-8. Daily Inspection 93 5-9. 100 Hour Inspection 93 5-10. 1000 Hour Inspection 93 Special Inspections 94 5-11. Special Inspections 94 5-12. Daily or Each 10 Hours of Flight Operation, Whichever Occurs First until 250 Hours 94 5-13. Between 5 and 10 Hours of Flight After Installation 94 5-14. Each 8 Hours of Component Operation 94 5-15. Each 25 Hours of Component Operation 94 5-16. Each 25 Hours for the Next Four Inspections 94 5-17. Each 25 Hours of Component Operation or 15 Days, or Each 5 Days for Blades Operating in a Salt Laden Atmosphere, Whichever Occurs First 95 5-18. 100 Hours After Each Installation 95 5-19. Main Rotor Grip Ultrasonic Inspection 95 5-20. Each 300 Hours of Component Operation 95 5-21. Each 300 Hours or 3 Months of Component Operation 95 5-22. Each 500 Hours of Component Operation 95 5-23. Each 600 Hours/6 Months of Tail Rotor Drive Shaft Coupling Operation 96 5-24. Each 600 Hours or 12 Months of Component Operation 96 5-25. Each 6 Months 96 5-26. Each 12 Months 96 5-27. Each 1000 Hours or 12 Months of Component Operation 96 5-28. First 1000 Hours of Component Time and Each 3000 Hours Thereafter of Component Time 96 5-29. Each 1200 Hours of Component Operation - Deleted 97 5-30. Each 1200 Hours or 24 Months, Whichever Comes First 97 5-31. Each 24 Months of Flight Control System Bolt Operation 97 5-32. Each 3000 Hours of Component Operation 97 5-33. Each 3100 Hours of Component Operation 97 HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL HTCM-006 UH-1H MAIN ROTOR BLADE Change Letter: D Change Date: 01/03/2020 12902 South Broadway • Los Angeles, California 90061 Sheet 17 of 114 – HTC Proprietary Data Not to be Distributed Conditional Inspections 98 5-34. Conditional Inspections 98 5-35. Hard Landing 98 5-36. After Blade Strike or Other Rotating System Torque Spike Spike 98 5-37. Sudden Stoppage/Acceleration – Main Rotor 98 5-38. Sudden Stoppage/Acceleration – Tail Rotor 98 5-39. Overspeed 98 5-40. Overtorque 99 5-41. Compressor Stall or Surge 99 5-42. Lightning Strikes 99 5-43. Magnetic Compass Malfunction 99 Component Overhaul Schedule 100 5-44. Component Overhaul Schedule 100 Figure 5-1. Component Overhaul Schedule 100 Chapter 6. Dimensions and Charts 101 6-1. Principal Dimensions 101 6-2. Stations, Waterlines, and Buttocklines 101 Figure 6-1. Principal Dimensions 101 Figure 6-2. Station Diagram 101 Chapter 7. Lifting and Jacking 102 7-1. Lifting and Jacking 102 7-2. Lifting the Complete Helicopter 102 7-3. Lifting the Tailboom Only 102 7-4. Jacking 102 Figure 7-1. Jacking 102 Chapter 9. Towing 103 9-1. Towing 103 HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL HTCM-006 UH-1H MAIN ROTOR BLADE Change Letter: D Change Date: 01/03/2020 12902 South Broadway • Los Angeles, California 90061 Sheet 18 of 114 – HTC Proprietary Data Not to be Distributed Chapter 10. Parking and Mooring 104 10-1. Parking - Normal Conditions 104 10-2. Parking - Turbulent Conditions 104 10-3. Mooring 104 Figure 10-1. Parking and Mooring 104 10-4. Helicopter Storage 104 10-5. Environmental Conditions 104 10-6. Flyable Storage 104 10-7. Short Term Storage 105 10-8. Intermediate Storage 105 Chapter 65. Rotor System 106 65-1. Rotor System 106 65-2. Vibration Analysis 106 65-3. Extreme Low Frequency Vibration 106 65-4. Low Frequency Vibration 106 65-5. Medium Frequency Vibration 106 65-6. High Frequency Vibration 106 65-7. Main Rotor Troubleshooting 107 Table 65-1. Main Rotor Troubleshooting 107 65-9. Operational Check - Main Rotor System 107 65-10. Main Rotor Tracking 107 Figure 65-1. Main Rotor Tracking Procedure 107 65-11. Main Rotor Blade Vibration Check and Adjustment 107 65-12. Main Rotor Blade Sweeping 107 65-13. Main Rotor Autorotation RPM Adjustment 108 Figure 65-2. Lateral Vibration Check 108 Figure 65-3. Rotor Smoothing Procedure 108 Figure 65-4. Trim Tab Bender and Gage 108 HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL HTCM-006 UH-1H MAIN ROTOR BLADE Change Letter: D Change Date: 01/03/2020 12902 South Broadway • Los Angeles, California 90061 Sheet 19 of 114 – HTC Proprietary Data Not to be Distributed 65-14. Main Rotor Hub and Blade 108 65-15. Removal – Main Rotor Hub and Blade 108 65-15A. Inspection and Repair – Main Rotor Hub and Blade 108 65-16. Installation – Main Rotor Hub and Blade 109 Figure 65-5. Main Rotor System 109 Figure 65-6. Main Rotor Retaining Nut Damage and Repair Limits 109 Figure 65-7. Main Rotor Cone Set Damage and Repair Limits 109 65-17. Minimum Blade Angle – Main Rotor Hub and Blade 109 65-18. Collective Pitch Forces – Adjustment 109 Figure 65-8. Main Rotor System Torque Values 109 Figure 65-9. Collective Pitch Retention Strap Adjustment 110 65-19. Resetting Main Rotor Grip Tension-Torsion Strap 110 65-20. Resetting Main Rotor Grip Tension-Torsion Strap – Initial Setting 110 65-21. Main Rotor Blades 110 65-22. Preventative Maintenance for Main Rotor Blades 110 65-23. Main Rotor Blade Daily Inspection 110 65-24. Nonrepairable Damage - Main Rotor Blades 110 65-25. Inspection and Minor Repair - Main Rotor Blades 111 Figure 65-10. Main Rotor Blade 111 65-26. Field Repairs - Main Rotor Blades 111 Figure 65-11. Main Rotor Blade Repair 111 65-27. Polyurethane Tape - Installation 111 65-28. Deleted 111 65-29. Main Rotor Blade Paint Touch-Up 111 65-30. Main Rotor Blade Trim Tab 112 65-31. Replacement - Main Rotor Blade - Trim Tab 112 Figure 65-12. Trim Tab Replacement 112 HTC SPECIFIC INSPECTIONS 113 For 500P2100-101 Only: Main Rotor Blade Root End Periodic Inspection Requirements 113 Required Materials 113 Inspection Instructions 113 HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL HTCM-006 UH-1H MAIN ROTOR BLADE Change Letter: D Change Date: 01/03/2020 12902 South Broadway • Los Angeles, California 90061 Sheet 20 of 114 – HTC Proprietary Data Not to be Distributed LIST OF EFFECTIVE PAGES Sheets Revision Date Sheets Revision Date Sheets Revision Date Sheets Revision Date 1 01/03/2020 D 30 01/03/2020 D 59 01/03/2020 D 88 01/03/2020 D 2 01/03/2020 D 31 01/03/2020 D 60 01/03/2020 D 89 01/03/2020 D 3 01/03/2020 D 32 01/03/2020 D 61 01/03/2020 D 90 01/03/2020 D 4 01/03/2020 D 33 01/03/2020 D 62 01/03/2020 D 91 01/03/2020 D 5 01/03/2020 D 34 01/03/2020 D 63 01/03/2020 D 92 01/03/2020 D 6 01/03/2020 D 35 01/03/2020 D 64 01/03/2020 D 93 01/03/2020 D 7 01/03/2020 D 36 01/03/2020 D 65 01/03/2020 D 94 01/03/2020 D 8 01/03/2020 D 37 01/03/2020 D 66 01/03/2020 D 95 01/03/2020 D 9 01/03/2020 D 38 01/03/2020 D 67 01/03/2020 D 96 01/03/2020 D 10 01/03/2020 D 39 01/03/2020 D 68 01/03/2020 D 97 01/03/2020 D 11 01/03/2020 D 40 01/03/2020 D 69 01/03/2020 D 98 01/03/2020 D 12 01/03/2020 D 41 01/03/2020 D 70 01/03/2020 D 99 01/03/2020 D 13 01/03/2020 D 42 01/03/2020 D 71 01/03/2020 D 100 01/03/2020 D 14 01/03/2020 D 43 01/03/2020 D 72 01/03/2020 D 101 01/03/2020 D 15 01/03/2020 D 44 01/03/2020 D 73 01/03/2020 D 102 01/03/2020 D 16 01/03/2020 D 45 01/03/2020 D 74 01/03/2020 D 103 01/03/2020 D 17 01/03/2020 D 46 01/03/2020 D 75 01/03/2020 D 104 01/03/2020 D 18 01/03/2020 D 47 01/03/2020 D 76 01/03/2020 D 105 01/03/2020 D 19 01/03/2020 D 48 01/03/2020 D 77 01/03/2020 D 106 01/03/2020 D 20 01/03/2020 D 49 01/03/2020 D 78 01/03/2020 D 107 01/03/2020 D 21 01/03/2020 D 50 01/03/2020 D 79 01/03/2020 D 108 01/03/2020 D 22 01/03/2020 D 51 01/03/2020 D 80 01/03/2020 D 109 01/03/2020 D 23 01/03/2020 D 52 01/03/2020 D 81 01/03/2020 D 110 01/03/2020 D 24 01/03/2020 D 53 01/03/2020 D 82 01/03/2020 D 111 01/03/2020 D 25 01/03/2020 D 54 01/03/2020 D 83 01/03/2020 D 112 01/03/2020 D 26 01/03/2020 D 55 01/03/2020 D 84 01/03/2020 D 113 01/03/2020 D 27 01/03/2020 D 56 01/03/2020 D 85 01/03/2020 D 114 01/03/2020 D 28 01/03/2020 D 57 01/03/2020 D 86 01/03/2020 D -- -- 29 01/03/2020 D 58 01/03/2020 D 87 01/03/2020 D -- -- HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL HTCM-006 UH-1H MAIN ROTOR BLADE Change Letter: D Change Date: 01/03/2020 12902 South Broadway • Los Angeles, California 90061 Sheet 21 of 114 – HTC Proprietary Data Not to be Distributed PURPOSE The purpose of this document is to both provide instructions for Maintenance and Use of HTC produced Main Rotor Blade Assemblies and to provide an index to the relevant Chapters or Sections of the applicable Maintenance Manual for the particular model of helicopter. It is extremely important that these relevant sections of the be followed precisely. The most current revision of this document (HTCM-006) will be available on the Helicopter Technology Company (HTC) website at www.helicoptertech.com under Technical Publications. Note: As applicable and unless otherwise noted, all references below are to be found in:  Technical Manual – Aviation and Intermediate Maintenance Instructions Army Model UH-1H/V/EH-1H/X (TM 55-1520-210-23-1).  Helicopter Maintenance Manual – Supplement No. 1 to Army Model UH-1B Helicopter (Restricted Category).  Technical Manual – Organizational Maintenance USAF Models TH-1F, UH-1F, and UH-1P Helicopters - T.O. 1H-1(U)F-2-1. HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL HTCM-006 UH-1H MAIN ROTOR BLADE Change Letter: D Change Date: 01/03/2020 12902 South Broadway • Los Angeles, California 90061 Sheet 22 of 114 – HTC Proprietary Data Not to be Distributed  Maintenance and Overhaul Instructions – Bell Model 204B – BHT-204B-M&O-1.  Maintenance Manual – Bell Model 205A-1 – BHT-205A1-MM-1. Note: HTC has used the best possible materials for the construction of its Main Rotor Blade Assemblies. HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL HTCM-006 UH-1H MAIN ROTOR BLADE Change Letter: D Change Date: 01/03/2020 12902 South Broadway • Los Angeles, California 90061 Sheet 23 of 114 – HTC Proprietary Data Not to be Distributed REFERENCE DOCUMENTS 1. Technical Manual – Aviation and Intermediate Maintenance Instructions Army Model UH-1H/V/EH-1H/X (TM 55-1520-210-23-1), Headquarters, Department of the Army, Washington, D.C., Change 47, dated 20 September 2005, or later approved revision. 2. Technical Manual – Preventative Maintenance Daily Inspection Checklist (TM 55-1520-210-PMD), Headquarters, Department of the Army, Washington, D.C. 3. Technical Manual – Phased Maintenance Checklist (TM 55-1520-210- PM), Headquarters, Department of the Army, Washington, D.C. 4. Federal Aviation Administration (FAA) Supplemental Type Certificate (STC) Number SR00026DE, Rotorcraft Development Corp., Corvalis, Montana, dated 06 September 2012, or later approved revision. 5. Helicopter Maintenance Manual Supplement No. 1 to Army Model UH- 1B Helicopter (Restricted Category), San Joaquin Helicopters, Delano, California. 6. Technical Manual – Organizational Maintenance USAF Models TH-1F, UH-1F, and UH-1P Helicopters - T.O. 1H-1(U)F-2-1, Secretary of the Air Force, Washington, D.C., Change 14, dated 28 April 1988, or later approved revision. 7. Technical Manual – Scheduled Inspection and Maintenance Requirements USAF Series TH-1F, UH-1F, and UH-1P Helicopters - T.O. 1H-1(U)F-2-6, Secretary of the Air Force, Washington, D.C., Change 16, dated 16 February 1988, or later approved revision. HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL HTCM-006 UH-1H MAIN ROTOR BLADE Change Letter: D Change Date: 01/03/2020 12902 South Broadway • Los Angeles, California 90061 Sheet 24 of 114 – HTC Proprietary Data Not to be Distributed 8. Maintenance and Overhaul Instructions – Bell Model 204B – BHT- 204B-M&O-1, Bell Helicopter, a Textron Company, Fort Worth, Texas, Revision 10, dated 24 June 2011, or later approved revision. 9. Maintenance Manual – Bell Model 205A-1 – BHT-205A1-MM-1, Bell Helicopter, a Textron Company, Fort Worth, Texas, Revision 7, dated 08 July 2013, or later approved revision. 10. FAA Airworthiness Directive (AD) 2018-02-07 – Applicability: TH-1F, UH-1B with STC SR0026DE Installed, UH-1F,UH-1H, and UH-1P, dated 01 February 2018 11. FAA Airworthiness Directive (AD) 2018-02-08 – Applicability: 204B, 205A, and 205A-1, dated 01 February 2018 12. Mandatory Service Bulletin (SB) 204-2100-1R3, Main Rotor Blade Root End Periodic Inspection and Protection, Revision 3 – Applicability: UH-1H, UH-1B with STC SR0026DE Installed, TH-1F, UH-1F, UH-1P, 204B, 205A, 205A-1, Helicopter Technology Company (HTC), dated 12 December 2017. HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL HTCM-006 UH-1H MAIN ROTOR BLADE Change Letter: D Change Date: 01/03/2020 12902 South Broadway • Los Angeles, California 90061 Sheet 25 of 114 – HTC Proprietary Data Not to be Distributed DEFINITIONS AND ABBREVIATIONS As applicable and unless otherwise noted, all Definitions and Abbreviations are to be found in:  Technical Manual – Aviation and Intermediate Maintenance Instructions Army Model UH-1H/V/EH-1H/X (TM 55-1520-210-23-1).  Helicopter Maintenance Manual – Supplement No. 1 to Army Model UH-1B Helicopter (Restricted Category).  Technical Manual – Organizational Maintenance USAF Models TH-1F, UH-1F, and UH-1P Helicopters - T.O. 1H-1(U)F-2-1.  Maintenance and Overhaul Instructions – Bell Model 204B – BHT-204B-M&O-1.  Maintenance Manual – Bell Model 205A-1 – BHT-205A1-MM-1. HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL HTCM-006 UH-1H MAIN ROTOR BLADE Change Letter: D Change Date: 01/03/2020 12902 South Broadway • Los Angeles, California 90061 Sheet 26 of 114 – HTC Proprietary Data Not to be Distributed WEIGHT AND BALANCE Installation of the Helicopter Technology Company (HTC) Part Number 204P2100-101 and/or -103 Main Rotor Blade is a direct replacement the Bell Helicopter - Textron Part Number 204-011-250-113 Main Rotor Blade and does not constitute a change to the Weight and Balance of the aircraft. HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL HTCM-006 UH-1H MAIN ROTOR BLADE Change Letter: D Change Date: 01/03/2020 12902 South Broadway • Los Angeles, California 90061 Sheet 27 of 114 – HTC Proprietary Data Not to be Distributed WARNINGS As applicable and unless otherwise noted, all Warnings are to be found in:  Technical Manual – Aviation and Intermediate Maintenance Instructions Army Model UH-1H/V/EH-1H/X (TM 55-1520-210-23-1).  Helicopter Maintenance Manual – Supplement No. 1 to Army Model UH-1B Helicopter (Restricted Category).  Technical Manual – Organizational Maintenance USAF Models TH-1F, UH-1F, and UH-1P Helicopters - T.O. 1H-1(U)F-2-1.  Maintenance and Overhaul Instructions – Bell Model 204B – BHT-204B-M&O-1.  Maintenance Manual – Bell Model 205A-1 – BHT-205A1-MM-1. HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL HTCM-006 UH-1H MAIN ROTOR BLADE Change Letter: D Change Date: 01/03/2020 12902 South Broadway • Los Angeles, California 90061 Sheet 28 of 114 – HTC Proprietary Data Not to be Distributed INDEX Index is to be found in the Technical Manual – Aviation and Intermediate Maintenance Instructions Army Model UH-1H/V/EH-1H/X (TM 55-1520-210-23-1), Headquarters, Department of the Army, Washington D.C. unless otherwise noted. As applicable and unless otherwise noted, the Index is to be found in:  Technical Manual – Aviation and Intermediate Maintenance Instructions Army Model UH-1H/V/EH-1H/X (TM 55-1520-210-23-1).  Helicopter Maintenance Manual – Supplement No. 1 to Army Model UH-1B Helicopter (Restricted Category).  Technical Manual – Organizational Maintenance USAF Models TH-1F, UH-1F, and UH-1P Helicopters - T.O. 1H-1(U)F-2-1.  Maintenance and Overhaul Instructions – Bell Model 204B – BHT-204B-M&O-1.  Maintenance Manual – Bell Model 205A-1 – BHT-205A1-MM-1. 4/13/2020 HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL HTCM-006 UH-1H MAIN ROTOR BLADE Change Letter: D Change Date: 01/03/2020 12902 South Broadway • Los Angeles, California 90061 Sheet 31 of 114 – HTC Proprietary Data Not to be Distributed Part Number 204P2100-101 and -103 Main Rotor Blade is applicable on the following UH-1H Models: JJASPP Engineering Services (R00004RC) Tamarack Helicopters (R00010SE) OAS Parts LLC (H7SO) Rotorcraft Dev. Corp. (H13WE) Southwest Florida Aviation (H6SO) Global Helicopter Technology (R00002RC) Hagglund Helicopters (H15NM) Arrow Falcon Exporters (R00007DE) Richard’s Heavylift Helo Inc. (H3SO) Northwest Rotorcraft (R00005SE) Part Number 204P2100-101 and -103 Main Rotor Blade is applicable on the following UH-1B Models with STC SR00026DE Installed: Rotorcraft Dev. Corp. (H3NM) Rotorcraft Dev. Corp. (H13WE) San Joaquin Helicopters (H1RM) International Helicopters (H5SO) Richards Heavylift Helo, Inc. (H3SO) OAS Parts LLC (H7SO) Note: On UH-1B Models with STC SR00026DE Installed, reference FAA STC Number SR00026DE and San Joaquin Helicopters Helicopter Maintenance Manual Supplement No. 1 to Army Model UH-1B Helicopter (Restricted Category). Part Number 204P2100-101 and -103 Main Rotor Blade is applicable on the following TH-1F Models: Rotorcraft Dev. Corp. (H12NM) Tamarack Helicopters (H7NE) Robinson Air Crane, Inc. (R00008AT) HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL HTCM-006 UH-1H MAIN ROTOR BLADE Change Letter: D Change Date: 01/03/2020 12902 South Broadway • Los Angeles, California 90061 Sheet 32 of 114 – HTC Proprietary Data Not to be Distributed Part Number 204P2100-101 and -103 Main Rotor Blade is applicable on the following UH-1F Models: Rotorcraft Dev. Corp. (H12NM) Tamarack Helicopters (H7NE) Robinson Air Crane, Inc. (R00008AT) AST, Inc (H11SW) California Department of Forestry (H2NM) Part Number 204P2100-101 and -103 Main Rotor Blade is applicable on the following UH-1P Models: Rotorcraft Dev. Corp. (H12NM) Robinson Air Crane, Inc. (R00008AT) Part Number 204P2100-101 and -103 Main Rotor Blade is applicable on the following 204B Model: Bell Helicopter Textron, Inc. (H1SW) Part Number 204P2100-101 and -103 Main Rotor Blade is applicable on the following 205A Model: Bell Helicopter Textron, Inc. (H1SW) Part Number 204P2100-101101 and -103 Main Rotor Blade is applicable on the following 205A-1 Model: Bell Helicopter Textron, Inc. (H1SW) HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL HTCM-006 UH-1H MAIN ROTOR BLADE Change Letter: D Change Date: 01/03/2020 12902 South Broadway • Los Angeles, California 90061 Sheet 33 of 114 – HTC Proprietary Data Not to be Distributed 204P2100-101 AND -103 MAIN ROTOR BLADE ASSEMBLY: FOR UH-1H MODELS (TM 55-1520-210-23-1) AND FOR UH-1B MODELS WITH STC NUMBER SR00026DE INSTALLED (TM 55-1520-210-23-1) CHAPTER 1. INTRODUCTION Section I. Servicing 1-7. Main and Tail Rotor System Refer to Paragraph 1-7. 1-14. Cleaning 1-15. Description - Cleaning Refer to Paragraph 1-15. 1-19. Rotor Blades - Cleaning Refer to Paragraph 1-19. 1-20. Treatment of Aluminum and Magnesium Corrosion Refer to Paragraph 1-20. HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL HTCM-006 UH-1H MAIN ROTOR BLADE Change Letter: D Change Date: 01/03/2020 12902 South Broadway • Los Angeles, California 90061 Sheet 34 of 114 – HTC Proprietary Data Not to be Distributed 1-21. Snow and Ice Removal Refer to Paragraph 1-21. HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL HTCM-006 UH-1H MAIN ROTOR BLADE Change Letter: D Change Date: 01/03/2020 12902 South Broadway • Los Angeles, California 90061 Sheet 35 of 114 – HTC Proprietary Data Not to be Distributed 1-22. Consumable Maintenance Supplies and Materials 1-23. Description - Consumable Maintenance Supplies and Materials Refer to Paragraph 1-23. Table 1-1. Consumable Maintenance Supplies and Materials Refer to Table 1-1. 1-24. Special Tools and Test Equipment 1-25. Description - Special Tools and Test Equipment Refer to Paragraph 1-25. Table 1-2. Special Tools and Test Equipment Refer to Table 1-2. HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL HTCM-006 UH-1H MAIN ROTOR BLADE Change Letter: D Change Date: 01/03/2020 12902 South Broadway • Los Angeles, California 90061 Sheet 36 of 114 – HTC Proprietary Data Not to be Distributed 1-26. Support Equipment 1-27. Description - Support Equipment Refer to Paragraph 1-27. Table 1-3. Support Equipment Refer to Table 1-3. 1-28. Standard Torque Procedures and Requirements Refer to Paragraph 1-28. Table 1-4. Standard Torque Chart Refer to Table 1-4. 1-29. Reuse of Self-Locking Nuts Refer to Paragraph 1-29. Table 1-7. Minimum Breakaway Torque HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL HTCM-006 UH-1H MAIN ROTOR BLADE Change Letter: D Change Date: 01/03/2020 12902 South Broadway • Los Angeles, California 90061 Sheet 37 of 114 – HTC Proprietary Data Not to be Distributed SECTION IV. INSPECTION REQUIREMENTS 1-56. General Information Refer to Paragraph 1-56. 1-57. Standards of Serviceability Refer to Paragraph 1-57. 1-58. Special Inspection 1-59. Description - Special Inspection Refer to Paragraph 1-59. 1-60. Definition and General Information - Special Inspection Refer to Paragraph 1-60. 1-61. Requirements - Special Inspection Refer to Paragraph 1-61. HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL HTCM-006 UH-1H MAIN ROTOR BLADE Change Letter: D Change Date: 01/03/2020 12902 South Broadway • Los Angeles, California 90061 Sheet 38 of 114 – HTC Proprietary Data Not to be Distributed Section V. Overhaul and Retirement Schedule 1-62. Introduction Refer to Paragraph 1-62. 1-63. Overhaul Interval 1-64. Description - Overhaul Interval Refer to Paragraph 1-64. 1-65. Retirement Schedule 1-66. Description - Retirement Schedule Refer to Paragraph 1-66. Table 1-8. Overhaul and Retirement Schedule Refer to Table 1-8. HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL HTCM-006 UH-1H MAIN ROTOR BLADE Change Letter: D Change Date: 01/03/2020 12902 South Broadway • Los Angeles, California 90061 Sheet 39 of 114 – HTC Proprietary Data Not to be Distributed Section VI. Flight Safety Critical Aircraft Parts 1-67. Flight Safety Critical Aircraft Parts Refer to Paragraph 1-67. Table 1-9. Flight Safety Critical Aircraft Parts Refer to Table 1-9. HELICOPTER TECHNOLOGY COMPANY MAINTENANCE MANUAL HTCM-006 UH-1H MAIN ROTOR BLADE Change Letter: D Change Date: 01/03/2020 12902 South Broadway • Los Angeles, California 90061 Sheet 40 of 114 – HTC Proprietary Data Not to be Distributed CHAPTER 5. ROTORS Section I. Main Rotor System 5-1. Main Rotor System 5-2. Description – Main Rotor System Refer to Paragraph 5-2. 5-3. Main Rotor Hub and Blade Assembly 5-4. Description - Main Rotor Hub and Blade Assembly Refer to Paragraph 5-4. 5-5. Cleaning - Main Rotor Hub and Blade Assembly Refer to Paragraph 5-5. 5-6. Lubrication - Main Rotor Hub and Blade Assembly Refer to Paragraph 5-6. 5-7. Alignment - Main Rotor Hub and Blade Assembly Refer to Paragraph 5-7.