MAINTENANCE PRACTICES 1. Scheduled Servicing

Detail F Aeroshell 17 100 hrs. 2. Door handle (1) 13 Detail F Aeroshell 17 100 hrs. 3. Door hinges (2) Detail F MIL-M-7866 100 hrs. 1. Rudder trim tab actuator (1) Detail G MIL-G-23827 9 900 hrs. or 5 years 2. Rudder trim tab hinge (1) Detail G VV-L-800A (Preferred)LPS- 1CRC 3-36WD-40 100 hrs. 3. Rudder trim tab clevis (1) Detail G VV-L-800A (Preferred)LPS- 1CRC 3-36WD-40 100 hrs. 1. Elevator trim tab actuator (2) Detail H MIL-G-23827 9 900 hrs. or 5 years 2. Elevator trim tab hinge (2) Detail H VV-L-800A (Preferred) LPS- 1CRC 3-36WD-40 100 hrs. 3. Elevator push-pull rod ends (4) Detail H SAE 10W30 100 hrs. Baron Models 55 and 58 Maintenance Manual (Rev H1) 12-20-00 (Rev H1) Copyright © Textron Aviation Inc. Page 3 of 10 Retain printed data for historical reference only. For future maintenance, use only current data. Print Date: Mon Apr 15 10:28:10 CDT 2024 4. Elevator trim tab clevis (2) Detail H VV-L-800A (Preferred)LPS- 1CRC 3-36WD-40 100 hrs. 1. Aileron trim tab actuator (1) Detail I MIL-G-23827 9 900 hrs. or 5 years 2. Aileron trim tab hinge (1) Detail I VV-L-800A (Preferred)LPS- 1CRC 3-36WD-40 100 hrs. 3. Aileron trim tab clevis (1) Detail I VV-L-800A (Preferred)LPS- 1CRC 3-36WD-40 100 hrs. 1. Aileron bell cranks (6) Detail J SAE 20 or SAE 10W30 100 hrs. 2. Aileron push-pull rod ends (4) 12 Detail J MIL-G-23827 9 or SAE 20 or SAE 10W30 100 hrs. 1. Flap actuator (2) Detail K Mobil Lube SHC 75W Oil (Preferred) MIL-PRF-2105 Grade 75 900 hrs. 1. Main wheel bearings (4) Detail L Aeroshell 5 (Preferred) or MIL- G-81322 11 100 hrs. 2. Main shock struts (2) Detail L MIL-H-5606 100 hrs. 3. Up lock rollers (2) (Refer to LUBRICATION OF LANDING GEAR UPLOCK ROLLERS, 05-20-00, 601) Detail L 4. Main gear attach points(4) 1 Detail L Aeroshell 22 (Preferred) MIL-G-81322 9 100 hrs. 5. Main gear retract points (8) Detail L Aeroshell 22 (Preferred) MIL-G-81322 9 100 hrs. 6. Main gear torque knee (10) Detail L Aeroshell 22 (Preferred) MIL-G-81322 9 100 hrs. 1. Flap motor gear box (1) 5 Detail M MIL-G-23827 9 600 hrs. 2. Flap flexible drive shaft (2) 6 Detail M MIL-G-23827 9 900 hrs. 1. Nose wheel door hinges (4) Detail N SAE 20 or SAE 10W30 100 hrs. 1. Nose wheel bearings (2) Detail O Aeroshell 5 (Preferred)or MIL- G-81322 11 100 hrs. 2. Shimmy damper (1) Detail O MIL-H-5606 100 hrs. 3. Nose shock strut (1) Detail O MIL-H-5606 100 hrs. 4. Nose gear torque knee (6) 4 Detail O Aeroshell 22 (Preferred) MIL-G-81322 9 100 hrs. 5. Nose gear swivel fittings (2) 8 Detail O Aeroshell 22 (Preferred) MIL-G-81322 9 100 hrs. 6. Nose gear attach points (2) 8 Detail O Aeroshell 22 (Preferred) MIL-G-81322 9 100 hrs. 7. Nose gear retract points (4) Detail O Aeroshell 22 (Preferred) MIL-G-81322 9 100 hrs. 8. Rod end fitting (1) Detail O Aeroshell 22 (Preferred) MIL-G-81322 9 100 hrs. Baron Models 55 and 58 Maintenance Manual (Rev H1) 12-20-00 (Rev H1) Copyright © Textron Aviation Inc. Page 4 of 10 Retain printed data for historical reference only. For future maintenance, use only current data. Print Date: Mon Apr 15 10:28:10 CDT 2024 1. Nose steering mechanism (6) Detail P Aeroshell 22 (Preferred) MIL-G-81322 9 100 hrs. 2. Rod end bearing Detail P SAE 20 As Required 1. Heater iris valve (1) Detail Q MIL-M-7866 As Required 14 300 hrs. 15 NOTE: Any parts that rotate or slide (metal-to-metal) and have no other provision for lubrication must be lubricated with SAE 20 or SAE 10W30 oil. ( ) Number in parenthesis indicates number of lubrication points. 1 No lubrication required TC-251, TC-344 and After; TE-1 and After. 2 Lubrication required TC-1093 and After; TE-560 and After. 3 Flap track rollers (pre-lubed sealed bearings). 4 No lubrication required TE-301 and After; TH-1 and After. 5 The flap motor gear box cannot be lubricated on TC-2003 and After; TE-1084 and After; TH-773 and After. 6 Lubricate the inner cable of the flexible drive shaft. Access is gained at the actuator end of the flexible drive shaft by removing the retaining ring from the actuator housing, then pulling the inner cable from the flexible housing. 7 The nose gear retract arm is located beneath the gear box. 8 Lubrication required TH-484 and After; TE-1 and After, except TE-301 thru TE-985. 9 Precaution should be taken when using MIL-G-23827 and MIL-G-81322, since these greases contain chemicals harmful to painted surfaces. 10 TH-1389, TH-1396 and After with dual control columns (Refer to Figure 203). 11 Aeroshell 5 and MIL-G-81322 are not compatible lubricants and must not be mixed. CAUTION: If the type of grease in the wheel bearings is changed, make certain that all affected areas are thoroughly cleaned before relubrication. 12 Lubricate the aileron push-pull rod ends in place at 100-hour intervals using SAE 20 or SAE 10W30 oil, or remove the aileron push-pull rod assembly, and clean and lubricate rod ends using MIL-G-23827 9 grease. Rotate the rod end eye balls to check for adequate lubrication coverage. Check the aileron system rigging after reinstallation of the push-pull rod assembly. 13 Lubricate between all moving parts and at all joints. 14 Lubricate iris valve required TH-2339 and Prior. 15 Lubricate iris valve required TH-2340 and After. D. Interior Cleaning Frequently the seats, rug, upholstery panels and head lining should be vacuum-cleaned to remove as much surface dust as possible. Experience has shown that commercial foam-type cleaners or shampoo can be used to condition the surface of rugs, carpets and upholstered materials. The upholstery is first vacuum-cleaned, stains removed, then a solution of the cleaner is prepared by mixing a small amount in a bucket of water, and beating the mixture until a heavy foam is formed. Apply the foam uniformly over the surface to be cleaned with a brush, then remove the suds with a vacuum cleaner, or by wiping off with a brush or cloth. Since there is very little moisture in this foam, wetting of the fabric or retention of moisture in the warp does not occur. Unlacquered metal fittings and furnishings within the airplane can be cleaned with most commercial metal polishes. Use a soft, clean rag for application; then polish to a brilliant gloss with a dry cloth. Protect the finish with a good grade of wax. Baron Models 55 and 58 Maintenance Manual (Rev H1) 12-20-00 (Rev H1) Copyright © Textron Aviation Inc. Page 5 of 10 Retain printed data for historical reference only. For future maintenance, use only current data. Print Date: Mon Apr 15 10:28:10 CDT 2024 E. Leather Upholstery Leather upholstery should be kept waxed for maximum protection. For cleaning, a nonabrasive, chemically neutral, nonreactive, emulsion type cleaner of cream-like consistency is recommended. Dilute the cleaner with water, and apply it over the dirty surface with a sponge or soft cloth (use a gentle wiping motion, do not scrub). The solution should not be allowed to stand, but should be wiped off before drying. F. Exterior Cleaning Prior to cleaning the exterior, install wheel covers, making certain that wheel brakes are covered; attach pitot covers securely; install plugs in, or mask off, all other openings. Be particularly careful to mask off both static air buttons before washing or waxing. G. Unpainted Surfaces Use a BON-AMI type mild abrasive for cleaning unpainted clad aluminum and stainless steel surfaces and for removing stains and embedded surface dirt. These cleaners, while they restore a bright metal finish to the surface, remove any wax that may be on the surface; rewaxing will be necessary. Use cleaner sparingly, applying directly to the surface with a clean damp cloth. Rub briskly so that cleaner will penetrate the dirt and oxide film. Remove excess cleaner and dissolved dirt with another clean damp cloth, and polish surface with a clean dry cloth. Rub to obtain a smooth polished finish. H. Painted Surfaces The materials for removing dirt, grease and bug juice from the painted surface are easily obtainable, such as a cellulose sponge, or mild soap - absolutely no synthetic detergents can be used - naphtha, a few clean white rags, a chamois and lots of cool water. When removing dust and dirt, use a cellulose sponge rubbing in a circular motion and adding water when needed. Dry with chamois to prevent water marks. Oil and grease can be removed with a rag dampened with naphtha. For removing dust and bug juice which adhere to the leading edges and nose, use a mild soap solution and a cellulose sponge. Do not use a synthetic detergent or any harsh soaps. Do not use a hard scrubbing action with the sponge. Flush the entire surface with water to remove all traces of soap and dry with a chamois. I. Final Wax Application A thorough waxing protects painted and unpainted metal surfaces by preventing salt air, smoke, moisture and exhaust gas attacks; it retards adherence of sticky airborne dust and minimizes corrosion. The frequency of rewaxing is dependent upon frequency with which regular maintenance cleaning is performed. Apply wax with a soft damp cloth. Rub on surface with a light circular motion, covering an area of approximately 2 square feet at a time. Polish with a clean dry cloth. CAUTION: At time of delivery, painted surfaces should not be polished or waxed until the finish has cured for at least 90 days. No hard rubbing, abrasive cleaners or wax seals detrimental to the proper curing of the finish should be used. J. Propellers Since propellers are subject to severe wear and atmospheric conditions, check blades and dome for oxidation and corrosion. Brush area with a phosphatizing agent to remove superficial corrosion. Smooth etched and pitted areas by buffing smooth with an aluminum polish. Take the following precautionary measures while cleaning the propellers: (1) Be sure ignition switches are OFF before cleaning propellers. (2) If a liquid cleaner is used, avoid using excessive amounts because it may spatter or run down the blade and enter the hub or engine accessories. (3) Check area around hub to be sure all compound is removed. K. Cleaning Deicer Boots The boots should be checked for engine oil after servicing and at the end of each flight, and any oil found should be removed. This can be accomplished, preferably, by the use of a neutral soap and water solution. If necessary, however, the oil may be removed by wiping the boot surface lightly with a rag moistened with toluol or uncontaminated unleaded aviation gasoline. When gasoline is used, the surface should be wiped dry immediately without allowing the gasoline to penetrate into the rubber. Also care should be exercised to avoid scrubbing the surface of the boot as this will tend to remove the thin coating of conductive cement. NOTE: Since deicer boots are made of soft, flexible stock, care must be exercised against dragging gasoline hoses over them or resting ladders or platforms against the boot's surface. L. Engine Cleaning The engine may be cleaned with kerosene, Stoddard solvent, or any standard solvent recommended for cleaning engines. The cleaner may be sprayed or brushed on the engine. Wipe the engine dry; compressed air may be used to remove excessive oil. Baron Models 55 and 58 Maintenance Manual (Rev H1) 12-20-00 (Rev H1) Copyright © Textron Aviation Inc. Page 6 of 10 Retain printed data for historical reference only. For future maintenance, use only current data. Print Date: Mon Apr 15 10:28:10 CDT 2024 M. Landing Gear and Tires Emulsion type cleaners are recommended for cleaning landing gear. These solutions usually contain solvents which are injurious to rubber if allowed to remain in contact for any length of time. If these solvents come in contact with tires as a result of other cleaning operations, the solvent should be removed with a thorough water rinse. N. Wheel Wells and Nacelles Most compounds used for removing oil, grease, and surface dirt from wheel wells and nacelles are emulsifying agents. These compounds, when mixed with petroleum solvents, emulsify the oil, grease, and dirt. The emulsion is then removed by rinsing with water or by spraying with a petroleum solvent. Take the following precautionary measures while cleaning the wheels and nacelles: a) Cover openings and air scoops. b) During cold weather (if water rinse is used) remove any evidence of water by blowing out with an air gun. Any water that remains may freeze and lock the controls. Baron Models 55 and 58 Maintenance Manual (Rev H1) 12-20-00 (Rev H1) Copyright © Textron Aviation Inc. Page 7 of 10 Retain printed data for historical reference only. For future maintenance, use only current data. Print Date: Mon Apr 15 10:28:10 CDT 2024 Figure 201 : Sheet 1 : Lubrication Diagram (TC-1 and After; TE-1 and After) Baron Models 55 and 58 Maintenance Manual (Rev H1) 12-20-00 (Rev H1) Copyright © Textron Aviation Inc. Page 8 of 10 Retain printed data for historical reference only. For future maintenance, use only current data. Print Date: Mon Apr 15 10:28:10 CDT 2024 Figure 202 : Sheet 1 : Lubrication Diagram (TH-1 and After) Baron Models 55 and 58 Maintenance Manual (Rev H1) 12-20-00 (Rev H1) Copyright © Textron Aviation Inc. Page 9 of 10 Retain printed data for historical reference only. For future maintenance, use only current data. Print Date: Mon Apr 15 10:28:10 CDT 2024 Figure 203 : Sheet 1 : Dual Control Wheel Lubrication (TH-1389, TH-1396 and After) Baron Models 55 and 58 Maintenance Manual (Rev H1) 12-20-00 (Rev H1) Copyright © Textron Aviation Inc. Page 10 of 10 Retain printed data for historical reference only. For future maintenance, use only current data. Print Date: Mon Apr 15 10:28:10 CDT 2024