PC-12 Service Bulletin Number 32-029

Description Man hours - Aircraft Man hours - Spare NLG Strut Assemblies Repair Replacement Repair Replacement Preparation 0.25 0.25 - - Inspection - Aircraft 0.5 0.5 - - Inspection - Spare NLG Strut Assy - - 0.25 0.25 Repair of the Cylinder Pipe 4.0 - 4.0 - Replacement of the Nose-wheel Fork Assembly - 6.0 - 6.0 Close up 0.25 0.25 0.25 0.25 TOTAL MAN-HOURS 5.0 7.0 4.5 6.5 Service Bulletin No: 32-029 Date: Feb 08/21 Rev. No. 1 Date: Aug 06/21 Page 4 of 26 SERVICE BULLETIN L. References NOTE: When references are given without the model identifier: • For PC-12, PC-12/45 and PC-12/47 aircraft use the prefix 12-A • For PC-12/47E aircraft use the prefix 12-B or 12-C as necessary. Aircraft Maintenance Manual (AMM): Tool and Equipment Manual (TEM): Component Maintenance Manual (CMM): M. Publications Affected Not applicable. N. Interchangeability of Parts Not applicable. 07-10-00-00A-901A-A 12-20-04-00A-902A-A 20-31-00-00A-070A-A 20-40-10-00A-901A-A 32-00-00-00A-901A-A 32-00-00-00A-901B-A 32-20-00-00A-902A-A 32-20-01-02A-313A-A 32-30-00-00A-903A-A 32-30-00-00A-903B-A 32-40-02-00A-920A-A 00-00-00-00A-060A-A Document No. 02100 32-20-05 Service Bulletin No: 32-029 Date: Feb 08/21 Rev. No. 1 Date: Aug 06/21 Page 5 of 26 SERVICE BULLETIN 2. Material Information Operators that require additional information and/or Service Bulletin Material should contact their authorized Pilatus Service Center, or Pilatus Customer Support on www.pilatus-aircraft.com  contact us. NOTE: Part Numbers given in this Service Bulletin are correct at the time of approval. Pilatus Aircraft Ltd reserves the right to change the part numbers as necessary. Part numbers of items delivered with a kit are correct when the kit is dispatched. This could lead to differences between those part numbers quoted in a Service Bulletin and the kit if parts are superseded. Operators are requested to check the IPD for delivered parts which differ from those listed in the Service Bulletin Materials Kit List. A. Material - Price and Availability B. Warranty Credit will be issued for parts and labour for all affected aircraft on approval of a warranty claim, provided: • The work is accomplished by an authorized Service Center within the compliance time given in Para 1.E. of this Service Bulletin • The affected nose-wheel fork assembly and the feedback sheet have been returned to Pilatus Aircraft Ltd., CH-6371 Stans, Switzerland. C. Material Necessary for Each Aircraft (1) Material to Order From Pilatus All of the parts listed below are necessary for the replacement of the nose-wheel fork assembly during Steps 3.D., 3.E. and 3.F. NOTE: <1> One cotter pin only is necessary for the repair of the nose-wheel fork assembly during Step 3.C. New Part No. Description Old Part No. Qty Disp. Code Fig Item 511.23.12.026 PLACARD, A/C GROUND - 2 N - - 511.23.12.027 PLACARD, JACK POINT - 1 N - - 532.20.12.240 OR 532.20.12.267 NOSE-WHEEL FORK ASSEMBLY 532.20.12.112 1 R 2 11 940.17.02.502 COTTER PIN (MS24665-191) <1> - 1 1 N 2 2 5 14 946.91.26.893 O-RING SEAL (MIL-R-8791/1-233) - 1 N 2 28 Disposition Codes: D - Discard / N - New / R - Return to Pilatus Service Bulletin No: 32-029 Date: Feb 08/21 Rev. No. 1 Date: Aug 06/21 Page 6 of 26 SERVICE BULLETIN 946.97.02.233 RETAINER, SEAL PTFE (MIL-R-8791/1-233) - 1 N 2 29 946.97.11.224 PISTON-SEAL (7224-MS-160-P4) - 1 N 2 13 946.97.16.342 OR 946.97.16.344 RING SCRAPER (351-33100-369G) (USE UNTIL STOCKS ARE EXHAUSTED) RING SCRAPER (WE710B331AT05NE) (SUPERSEDES 946.97.16.342) - 1 N 2 32 946.97.10.331 ROD-SEAL (7331-FT-160-P4) - 1 N 2 27 New Part No. Description Old Part No. Qty Disp. Code Fig Item Disposition Codes: D - Discard / N - New / R - Return to Pilatus Service Bulletin No: 32-029 Date: Feb 08/21 Rev. No. 1 Date: Aug 06/21 Page 7 of 26 SERVICE BULLETIN (2) Operator Supplied Materials, AMM 20-31-00-00A-070A-A (3) Tooling - Cost and Availability Material No. Description Qty Remarks - TAPE, MASKING AR P01-016 ACETONE AR OR EQUIVALENT P02-001 LOCKWIRE (STANDARD) AR 8mm (0.32 in) DIAMETER P02-009 ABRASIVE CLOTH, GRADE 120 AR OR EQUIVALENT P02-011 ABRASIVE CLOTH, GRADE 240 AR OR EQUIVALENT P02-031 ABSORBENT PAPER AR OR EQUIVALENT P02-041 LINT-FREE CLEANING CLOTH AR OR EQUIVALENT P04-028 GREASE AR OR EQUIVALENT P04-030 GREASE AR ALTERNATIVE FOR P04-041 WHERE INSTRUCTED ONLY P04-041 GREASE AR ALTERNATIVE FOR P04-030 WHERE INSTRUCTED ONLY P07-001 CCC SOLUTION AR OR EQUIVALENT P07-007 PRIMER AR OR EQUIVALENT P08-018 SEALANT AR USA ONLY P08-071 SEALANT AR OR EQUIVALENT P09-040 MASKING PAPER AR OR EQUIVALENT P10-013 CPC AR OR EQUIVALENT P10-017 HYDRAULIC FLUID AR OR EQUIVALENT Tool No. Description Qty Remarks T07-040 NWS LOCKING SCREW AR T12-030 SAFETY CLIP, CIRCUIT BREAKER HOLD OPEN AR OR EQUIVALENT 513.32.12.061 PIN EXTRACTOR AR PART OF TOOLKIT T32-036 513.32.12.063 RUBBER GUIDE AR PART OF TOOLKIT T32-036 513.32.12.064 87 mm SPANNER AR PART OF TOOLKIT T32-036 513.32.12.074 EXTRACTING-TOOL AR PART OF TOOLKIT T32-036 - METAL SCRAPER AR LOCAL SUPPLY - NON-METALLIC SCRAPER AR LOCAL SUPPLY Service Bulletin No: 32-029 Date: Feb 08/21 Rev. No. 1 Date: Aug 06/21 Page 8 of 26 SERVICE BULLETIN - NON-METALLIC BRISTLE BRUSH AR LOCAL SUPPLY - MAGNIFYING GLASS X10 AR OR EQUIVALENT. LOCAL SUPPLY - BRIGHT LIGHT SOURCE AR LOCAL SUPPLY - HOT AIR BLOWER AR LOCAL SUPPLY - DIAMOND RIFFLER FILES AR LOCAL SUPPLY - EXTERNAL CALIPERS AR LOCAL SUPPLY - VACUUM CLEANER AR OR EQUIVALENT. LOCAL SUPPLY Tool No. Description Qty Remarks Service Bulletin No: 32-029 Date: Feb 08/21 Rev. No. 1 Date: Aug 06/21 Page 9 of 26 SERVICE BULLETIN 3. Accomplishment Instructions - Aircraft WARNING: BE CAREFUL WHEN YOU USE THE CONSUMABLE MATERIALS. OBEY THE MANUFACTURER’S HEALTH AND SAFETY INSTRUCTIONS AND ALL APPLICABLE LOCAL INSTRUCTIONS. THE CONSUMABLE MATERIALS CAN BE DANGEROUS AND CAUSE DEATH OR INJURY TO PERSONNEL AND/OR DAMAGE TO EQUIPMENT. CAUTION: BE CAREFUL WHEN YOU USE THE CLEANING MATERIALS. SOLVENTS CAN CAUSE DAMAGE TO RUBBER MATERIAL AND OTHER NON METAL PARTS. NOTE: To identify the consumables used in this procedure refer to the Consumable Materials List, refer to AMM 20-31-00-00A-070A-A. NOTE: To identify the AGE and tools used in this procedure refer to the List of AGE and Tools, TEM 00-00-00-00A-060A-A. A. Preparation (1) Obey the safety instructions given in Landing Gear Maintenance Practices, refer to AMM 32-00-00-00A-901A-A or 32-00-00-00A-901B-A. (2) If the aircraft is on jacks and/or trestles: (a) Put a warning sign (DO NOT OPERATE THE LANDING GEAR) in the flight compartment. (b) Open and install a safety clip, circuit breaker hold open (Tool No. T12-030) on the circuit breaker: HYDR CTL (NON ESSENTIAL BUS) (MSN 101 thru 544 and 546 thru 888) HYDR CTL (ESSENTIAL BUS) (MSN 545 and MSN 1001 thru 1719 and 1721 thru 1944) or LDG GEAR PWR (RH POWER JUNCTION BOX). B. Inspection Refer to Figure 1. NOTE: The serial number of the NLG strut assembly is shown on the identification label which is installed on the forward surface of the main fitting integral-assembly. (1) Make a lint-free cloth (Material No. P02-041) moist with acetone (Material No. P01-016) and clean the cylinder pipe at the nose wheel fork interface in the inspection area. (2) Do a visual inspection of the cadmium plating of the cylinder pipe at the nose wheel fork interface. Use a bright light source and magnifying glass if necessary: • Cadmium plating is applied to protect the cylinder pipe • Corrosion of the cadmium is shown by a white, brown or black color on the surface • Corrosion of the cylinder pipe is shown by a red color on the surface. (3) Do the instructions for repair of the cylinder pipe in Step 3.C. when you find untreated material (no cadmium plating) with or without corrosion. Service Bulletin No: 32-029 Date: Feb 08/21 Rev. No. 1 Date: Aug 06/21 Page 10 of 26 SERVICE BULLETIN (4) No repair is necessary when sealant or primer and top coat fully covers the cadmium plating between the nose wheel fork interface and the hard chrome plating on the cylinder pipe. Continue with the close up instructions in Step 3.G. (5) When you find corrosion of the cadmium plating the cylinder pipe is not affected by this SB: (a) Do the check/inspection procedures, refer to AMM 32-20-01-02A-313A-A. (b) Continue with the close up instructions in Step 3.G. C. Repair WARNING: WHEN YOU DRILL, CUT OR ABRADE MATERIALS YOU MUST WEAR THE CORRECT PROTECTIVE EQUIPMENT (GLOVES, FILTER MASKS AND FACE-SHIELDS/ SAFETYGLASSES/GOGGLES). ABRASIVE DUST CAN GET IN YOUR LUNGS OR ON YOUR SKIN AND CAUSE INJURY OR SKIN IRRITATION. DO NOT INHALE DUST. WHEN AUTHORIZED: • MAKE THE AREA MOIST BEFORE YOU MANUALLY ABRADE TO PREVENT AIRBORNE DUST PARTICLES. • USE A HAND-HELD ABRASION/GRINDER/SANDER TOOL THAT IS EXPLOSION PROOF WITH A SUCTION SYSTEM TO REMOVE DUST PARTICLES. MAKE SURE THAT THE WORK AREA IS FULLY VENTILATED. OBEY YOUR LOCAL REGULATIONS WHEN: • YOU DRILL OR ABRADE PAINTS, FILLERS, OR ANY OTHER MATERIALS. • YOU COLLECT AND DISCARD THE DUST AND OTHER UNWANTED MATERIALS. WARNING: DO NOT USE PRESSURE AIR SUPPLY TO CLEAN PARTICLES OF CADMIUM DUST. USE A VACUUM CLEANER. CAUTION: USE ONLY THE TOOLS AND MATERIALS GIVEN IN THIS PROCEDURE TO REMOVE MATERIAL. USE OF THE INCORRECT ABRASIVE MATERIALS CAN CAUSE CROSS- CONTAMINATION WITH EMBEDDED PARTICLES. THIS CAN CAUSE CORROSION. Refer to Figure 2 Sheet 1. (1) Disconnect the lower torque link (17) from the nose-wheel fork assembly (11). (a) Remove and discard the cotter pin (14). (b) Remove the nut (15), the washer (16) and the bolt (18). (c) Remove the lubrication pin (19). Refer to Figure 3 and Figure 4. (2) Apply masking paper (Material No. P09-040) to protect the nose wheel and axle. (3) Use non-metallic scrapers to fully remove the sealant between the cylinder pipe and nose wheel fork. Service Bulletin No: 32-029 Date: Feb 08/21 Rev. No. 1 Date: Aug 06/21 Page 11 of 26 SERVICE BULLETIN (4) Make a lint-free cloth (Material No. P02-041) moist with acetone (Material No. P01-016) and clean the interface area between cylinder pipe and nose wheel fork. Let the acetone dry. (5) Apply the masking tape and masking paper (Material No. P09-040) to protect the cylinder pipe and nose wheel fork: (a) Apply it to the hard chrome plate on the cylinder pipe approximately 1 mm (0.04 in) from its bottom edge. (b) Apply it around the area of removed sealant on the nose wheel fork. (6) Use external callipers to measure and record the cylinder pipe outside diameter ‘X’ in the untreated material area. Make sure that the outside diameter ‘X’ is between 56,910 and 57,120 mm (2.240 and 2.249 in). CAUTION: WHEN YOU BLEND OUT THE CORROSION: • MAKE SURE THAT YOU REMOVE THE MINIMUM QUANTITY OF MATERIAL NECESSARY TO REMOVE ALL THE CORROSION • MAKE SURE THAT THE REPAIR AREA IS SMOOTH WITH NO SCRATCHES OR SHARP EDGES • MAKE SURE THAT YOU DO NOT REMOVE MATERIAL FROM THE NOSE WHEEL FORK. (7) Blend out the corrosion as follows: (a) Use abrasive cloth, grade 120 (Material No. P02-009) and abrasive cloth, grade 240 P02-011) to remove the corrosion from the cylinder pipe in the non-masked area shown in Figure 4: 1 Cut the abrasive cloth into thin strips with the same width as the corrosion on the cylinder pipe. 2 Twist the strips of abrasive paper to remove corrosion below the fork level. (b) Use diamond riffler files to remove corrosion spots at the hard chrome transition. (8) Use abrasive cloth (Material No. P02-011) to roughen all of the non-masked area. (9) Use a vacuum cleaner to remove unwanted particles from the work area. (10) Make a lint-free cloth (Material No. P02-041) moist with acetone (Material No. P01-016) to clean the non-masked area. (11) Let the acetone to dry. (12) Use a bright light source and magnifying glass to examine the blended area surface for corrosion spots. None are permitted. (13) Use the external calipers to measure and record the cylinder pipe minimum outside diameter ‘X’ of the blended area. (14) Do the instructions to replace the cylinder pipe in Steps 3.D., 3.E. and 3.F. when the outside diameter ‘X’ is less than 55,8 mm (2.197 in). Service Bulletin No: 32-029 Date: Feb 08/21 Rev. No. 1 Date: Aug 06/21 Page 12 of 26 SERVICE BULLETIN (15) Apply the masking tape and masking paper (Material No. P09-040) again to protect the cylinder pipe and nose wheel fork. (16) Do a check of the surfaces of the nose wheel fork for bare aluminum. (17) Apply a layer of CCC solution (Material No. P07-001) to the bare aluminum of the nose wheel fork if necessary, refer to AMM 20-40-10-00A-901A-A. (18) Apply a layer of primer (Material No. P07-007) to all unprotected areas. (19) Allow the primer to fully cure for 72 hours: • You can use a hot air blower to reduce the curing time • Apply a maximum temperature of 50 °C (122 °F) in accordance with the manufacturer’s instructions. (20) Obey the manufacturer’s instructions and apply a fillet of sealant (Material No. P08-018 or P08-071) between the cylinder pipe and nose wheel fork masked area. Refer to Figure 2 Sheet 1. (21) Carefully remove the masking tape and masking paper and allow the sealant to fully cure for 30 hours: • After 2 hours at standard conditions (21°C (71°F) with 50% humidity) you can use a hot air blower to reduce the curing time if necessary • Apply a maximum temperature of 50°C (122°F) in accordance with the manufacturer’s instructions. (22) Connect the lower torque link (17) to the nose-wheel fork assembly (11): (a) Put the lower torque link (17) in position on the nose-wheel fork assembly (11) and install the lubrication pin (19). Make sure that the cut-out in the lubrication pin (19) aligns with the position of the bolt (18). (b) Make sure that the lubrication fitting in the lubrication pin (19) is on the right side of the NLG strut assembly. (c) Install the bolt (18), washers (16) and nut (15). (d) Safety the nut (15) with a new cotter pin (14) (P/N 940.17.02.502). (e) Apply CPC (Material No. P10-013) around the nut (15) and the bolt (18). D. Disassembly WARNING: SLOWLY RELEASE COMPRESSED GAS PRESSURE. IF YOU RELEASE THE PRESSURE TOO FAST, YOU CAN CAUSE INJURY TO PERSONNEL AND/OR DAMAGE TO EQUIPMENT. Refer to Figure 2 Sheet 1 and Figure 2 Sheet 2. NOTE: Two persons are necessary to do the steps that follow. Service Bulletin No: 32-029 Date: Feb 08/21 Rev. No. 1 Date: Aug 06/21 Page 13 of 26 SERVICE BULLETIN (1) Make a record of the installed positions of NLG parts during these disassembly procedures to help you when you assemble the NLG parts. (2) Make a note of the application of lockwire to parts and fasteners before you remove it. This helps you to safety the parts with lockwire during assembly (3) Raise the aircraft on jacks, refer to AMM 07-10-00-00A-901A-A. (4) Put spillage containers below the NLG strut assembly. (5) Clean the area around the two charging valves (1 and 3) with absorbent paper (Material No. P02-031). (6) Remove the caps (2 and 4) from the two charging valves (1 and 3). (7) Connect a drain hose and slowly open the STAGE 1 charging valve (3) (to release the nitrogen pressure from the shock absorber). Do not close the STAGE 1 charging valve but remove the drain hose. (8) Adjust the STAGE 2 pressure to 4 bar (60 psi). NOTE: The pressure in STAGE 2 is needed to keep the seals seated and the STAGE 2 piston in the correct position. (9) Remove the nose wheel, refer to AMM 32-40-02-00A-920A-A. (10) Disconnect the lower torque link (17) from the nose-wheel fork assembly (11): (a) Remove and discard the cotter pin (14). (b) Remove the nut (15), the washer (16) and the bolt (18). (c) Remove the lubrication pin (19). (11) Remove the sleeve (12): (a) Remove and discard the cotter pin (5). (b) If necessary, remove the sealant from around the nut (10). (c) Remove the nut (10), the bolt (8), the safety washers (9), the pins (6) and the stop plate (7). (d) Use the extracting-tool (P/N 513.32.12.074) and remove the sleeve (12) from the nose-wheel fork assembly (11). (e) Remove and discard the piston seal (13) from the sleeve (12). (12) Release the barrel nut (30): (a) Remove and discard the lockwire from the two screws in the barrel nut (30). (b) Loosen the two screws in the barrel nut (30). (c) Use the 87 mm spanner (P/N 513.32.12.064) to loosen the barrel nut (30). Service Bulletin No: 32-029 Date: Feb 08/21 Rev. No. 1 Date: Aug 06/21 Page 14 of 26 SERVICE BULLETIN (13) Carefully remove the nose-wheel fork assembly (33) together with the barrel nut (30) and guide pipe (25) attached from the steering tube assembly (22). (14) Remove the guide pipe (25): (a) Remove the guide ring (23) from the guide pipe (25). (b) Use the pin extractor (P/N 513.32.12.061) to remove the three driving pins (26). (c) Remove the guide pipe (25) from the nose-wheel fork assembly (33). (15) Remove the barrel nut (30) from the nose-wheel fork assembly (33). (16) Disassemble the barrel nut (30): (a) Remove and discard the O-ring seal (28) and PTFE seal retainer (29) from the barrel nut (30). (b) Remove and discard the scraper ring (32) from the barrel nut (30). (c) Remove and discard the three parts of the rod seal (27) from the barrel nut (30). E. Cleaning Do the applicable steps in CMM 32-20-05, Page Block 4001 - Cleaning. F. Assembly CAUTION: DISCARD ALL SEALS AND RUBBER BASED PARTS. YOU MUST USE NEW SEALS AND RUBBER BASED PARTS DURING THE ASSEMBLY PROCEDURE. THE INSTALLATION OF USED SEALS AND RUBBER BASED PARTS CAN CAUSE DAMAGE WHEN THE NLG ASSEMBLY IS PRESSURIZED. CAUTION: MAKE SURE THAT YOU IDENTIFY THE CORRECT INSTALLED POSITION OF ALL THE SEALS BEFORE YOU REMOVE THEM FROM THEIR TRANSIT PACKING. Refer to Figure 2 Sheet 1 and Figure 2 Sheet 2. (1) Lubricate all of the seals, O-ring seals, seal retainers, and other rubber based components with grease (Material No. P04-041 or P04-030). (2) Assemble the barrel nut (30): (a) Put the scraper ring (32) in position in the bottom of the barrel nut (30): • For scraper ring (32) P/N 946.97.16.342 only, make sure that the O-ring seal installed on the scraper ring (32) faces out • For scraper ring (32) P/N 946.97.16.344 only, make sure that the O-ring seal installed on the scraper ring (32) faces in. Service Bulletin No: 32-029 Date: Feb 08/21 Rev. No. 1 Date: Aug 06/21 Page 15 of 26 SERVICE BULLETIN (b) Put the sealing ring (27) in position in the top of the barrel nut (30): • The sealing ring (27) is a three part seal • Make sure that the rounded edges of the two outer seals mate with the rounded corners of the inner T-seal. (c) Install the seal retainer (29) and O-ring seal (28) in position in the external groove of the barrel nut (30). (d) Lubricate the inner side of the barrel nut (30) with the hydraulic fluid (Material No. P10-017). (e) Obey the manufacturer’s instructions and apply a layer of corrosion preventative (Material No. P04-039) on the outer surface of the barrel nut (30) where the O-ring seal (28) is in position. (f) Apply a layer of grease (Material No. P04-028) to the threads of the barrel nut (30). (g) Put the barrel nut (30) in position on the cylinder pipe of the nose-wheel fork assembly (33). Make sure that it can move freely on the cylinder pipe of the nose- wheel fork assembly (33). (3) Attach the guide pipe (25) to the nose-wheel fork assembly (33): (a) Put the guide pipe (25) in position on the cylinder pipe of the nose-wheel fork assembly (33). Make sure the holes for the three driving pins (26) are correctly aligned with the holes in the nose-wheel fork assembly (33). CAUTION: INSTALL THE DRIVING PINS WITH THE PIN EXTRACTOR AND YOUR HAND. DO NOT USE FORCE. TOO MUCH FORCE CAN DAMAGE THE PARTS. (b) Use the pin extractor (P/N 513.32.12.061) to install the three driving pins (26) the guide pipe (25) and fork assembly (33). Make sure that the heads of the driving pins (26) are below the adjacent surfaces of the guide pipe (25). (c) Put the guide ring (23) in position on the driving pins (26): • Carefully compress the guide ring (23) with your fingers before you install it • This is to make sure that it is a tight fit when installed. (4) Put the rubber guide (P/N 513.32.12.063) in position in the bottom of the steering tube assembly (22). Push the nose-wheel fork assembly (33) into the steering tube then remove the rubber guide. (5) Tighten and safety the barrel nut (30): (a) Install the barrel nut (30) in the steering tube assembly (22) and tighten it with your hand. Be careful you do no damage to the seal retainer (29). (b) Measure the run-down torque of the barrel nut (30) in the steering tube assembly (22). (c) Use the 87 mm spanner (P/N 513.32.12.064) and torque tighten the barrel nut (30) to between 10,2 and 11,3 Nm (90 and 100 lbf in) plus the run-down torque. Service Bulletin No: 32-029 Date: Feb 08/21 Rev. No. 1 Date: Aug 06/21 Page 16 of 26 SERVICE BULLETIN (d) Tighten the two screws in the barrel nut (30). (e) Safety the two screws in the barrel nut (30) to the taxi light bracket bolts with lockwire (Material No. P02-007). (f) Put the lower torque link (17) in position on the nose-wheel fork assembly (33) and install the lubrication pin (19). Make sure that the cut-out in the lubrication pin (19) aligns with the position of the bolt (18). (g) Make sure that the lubrication fitting in the lubrication pin (19) is on the right side of the NLG strut assembly. (h) Install the bolt (18), washers (16) and nut (15). (i) Safety the nut (15) with a new cotter pin (14) (P/N 940.17.02.502). (j) Apply CPC (Material No. P10-013) around the nut (15), the bolt (18) and the barrel nut (30). (6) Install the sleeve (12): (a) Lubricate the piston seal (13) with grease (Material No. P04-041 or P04-030). (b) Install the piston seal (13) on the sleeve (12). (c) Lubricate the sleeve (12) with hydraulic fluid (Material No. P10-017). (d) Put the sleeve (12) in position in the nose-wheel fork assembly (11) and align the holes for the bolt (8). (e) Put the stop plate (7) in position and align the holes for the two pins (6). (f) Install the pins (6), bolt (8), the safety washers (9) and the nut (10). (g) Safety the nut (10) with a new cotter pin (5) (P/N 940.17.02.502). (h) Apply CPC (Material No. P10-013) around the nut (10) and the bolt (8). (7) Remove the NWS locking screw (T07-040). (8) Install the nosewheel, refer to AMM 32-40-02-00A-920A-A. (9) Install the new placards (P/N 511.23.12.027 and 511.23.12.026) on the nose-wheel fork assembly as follows: (a) Use the old nose-wheel fork assembly to identify the correct positions on the left and right sides. (b) Remove the backing strip from the new placards. (c) Carefully install the placards. Make sure that there are no air bubbles between the placard and the surface of the part. (10) Service the NLG shock absorber, refer to AMM 32-20-00-00A-902A-A: (a) Pressurize STAGE 2 with nitrogen. Service Bulletin No: 32-029 Date: Feb 08/21 Rev. No. 1 Date: Aug 06/21 Page 17 of 26 SERVICE BULLETIN (b) Fill STAGE 1 with hydraulic fluid (Material No. P10-017). (c) Pressurize STAGE 1 with nitrogen. (11) Do the servicing procedures to lubricate the NLG with grease, refer to AMM 12-20-04- 00A-902A-A. G. Close-up (1) Remove all the equipment, tools and materials from the work area. Make sure that the work area is clean. (2) Remove the safety clip and close the circuit breaker: HYDR CTL (NON ESSENTIAL BUS) (MSN 101 thru 544 and 546 thru 888) HYDR CTL (ESSENTIAL BUS) (MSN 545 and MSN 1001 thru 1719 and 1721 thru 1944) or LDG GEAR PWR (RH POWER JUNCTION BOX). (3) Remove the warning sign (DO NOT OPERATE THE LANDING GEAR) from the flight compartment. (4) Do the functional test of the extension and retraction of the landing gear, refer to AMM 32- 30-00-00A-903A-A or 32-30-00-00A-903B-A. (5) Lower the aircraft off jacks, refer to AMM 07-10-00-00A-901A-A. H. Documentation (1) Make an entry in the Aircraft Logbook that this Service Bulletin is incorporated. (2) Make sure that the Aircraft Logbook shows any new Pilatus Part Number(s) and/or Serial Number(s), as applicable. (3) Make an entry in the Pilot’s Operating Handbook, Document No. 01973, 02211, 02277 or 02406 to record the incorporation of this Service Bulletin. (4) If the fork assembly was replaced, return the completed feedback sheet and the fork assembly to Pilatus Aircraft Ltd. (5) Inform CAMP of the incorporation of this Service Bulletin and any new Pilatus Part Number(s) and/or Serial Number(s), as applicable. Send the completed feedback sheet to: fax@campsystems.com. Service Bulletin No: 32-029 Date: Feb 08/21 Rev. No. 1 Date: Aug 06/21 Page 18 of 26 SERVICE BULLETIN 4. Accomplishment Instructions - NLG Strut Assemblies Held as Spare WARNING: BE CAREFUL WHEN YOU USE THE CONSUMABLE MATERIALS. OBEY THE MANUFACTURER’S HEALTH AND SAFETY INSTRUCTIONS AND ALL APPLICABLE LOCAL INSTRUCTIONS. THE CONSUMABLE MATERIALS CAN BE DANGEROUS AND CAUSE DEATH OR INJURY TO PERSONNEL AND/OR DAMAGE TO EQUIPMENT. CAUTION: BE CAREFUL WHEN YOU USE THE CLEANING MATERIALS. SOLVENTS CAN CAUSE DAMAGE TO RUBBER MATERIAL AND OTHER NON METAL PARTS. NOTE: To identify the consumables used in this procedure refer to the Consumable Materials List, refer to AMM 20-31-00-00A-070A-A. NOTE: To identify the AGE and tools used in this procedure refer to the List of AGE and Tools, TEM 00-00-00-00A-060A-A. A. Preparation Remove the NLG strut assembly from its storage packaging for the inspection and possible repair, Ref. Component Maintenance Manual (CMM) 32-20-05, Page Block 15001. B. Inspection Refer to Figure 1. (1) Make a lint-free cloth (Material No. P02-041) moist with acetone (Material No. P01-016) and clean the cylinder pipe at the nose-wheel fork interface (refer to Figure 1 for the area to be inspected). (2) Let the acetone dry. (3) Do a visual inspection of the cadmium plating of the cylinder pipe at the nose wheel fork interface. Use a bright light source and magnifying glass if necessary: • Cadmium plating is applied to protect the cylinder pipe • Corrosion of the cadmium is shown by a white, brown or black color on the surface • Corrosion of the cylinder pipe is shown by a red color on the surface. (4) Do the instructions for repair of the cylinder pipe in Step 4.C. when you find untreated material (no cadmium plating) with or without corrosion. (5) No repair is necessary when sealant or primer and top coat fully covers the cadmium plating between the nose wheel fork interface and the hard chrome plating on the cylinder pipe. Continue with the close up instructions in Step 4.E. C. Repair (1) Do the repair procedures given in Step 3.C. (2) Replace the nose-wheel fork assembly in accordance with Step 4.D. when the outside diameter ‘X’ of the cylinder pipe is less than 55,8 mm (2.197 in) when measured during Step 3.D.(14). Service Bulletin No: 32-029 Date: Feb 08/21 Rev. No. 1 Date: Aug 06/21 Page 19 of 26 SERVICE BULLETIN D. Replacement (1) Replace the nose-wheel fork assembly with a new nose-wheel fork assembly (P/N 532.20.12.240). (2) Obey the instructions for disassembly, cleaning, check, repair (if necessary), assembly and test in CMM 32-20-05 as necessary. E. Documentation (1) Make an entry on the two service labels for the NLG strut assembly that this Service Bulletin is incorporated. (2) Prepare the NLG strut assembly for storage, Ref. CMM 32-20-05, Page Block 15001. (3) If the fork assembly was replaced, return the completed feedback sheet and the fork assembly to Pilatus Aircraft Ltd., CH-6371 Stans, Switzerland. (4) Inform CAMP of the incorporation of this Service Bulletin and any new Pilatus Part Number(s) and/or Serial Number(s), as applicable. Send the completed feedback sheet to: fax@campsystems.com. Service Bulletin No: 32-029 Date: Feb 08/21 Rev. No. 1 Date: Aug 06/21 Page 20 of 26 SERVICE BULLETIN Nose Landing Gear Fork Assembly - Inspection Figure 1 A A B B INSPECTION AREA B INSPECTION AREA CYLINDER PIPE CORROSION OF CYLINDER PIPE PARTIAL CORROSION OF CYLINDER PIPE NOSE WHEEL FORK NOSE WHEEL FORK CYLINDER PIPE SB4110 Service Bulletin No: 32-029 Date: Feb 08/21 Rev. No. 1 Date: Aug 06/21 Page 21 of 26 SERVICE BULLETIN Nose Landing Gear - Disassembly/Assembly Figure 2 Sheet 1 SB3782 A B 3 C A B C D 11 13 12 10 8 6 6 9 5 7 1 2 4 9 14 15 16 17 16 18 19 Service Bulletin No: 32-029 Date: Feb 08/21 Rev. No. 1 Date: Aug 06/21 Page 22 of 26 SERVICE BULLETIN Nose Landing Gear - Disassembly/Assembly Figure 2 Sheet 2 D 22 23 24 25 26 26 26 27 28 29 30 31 32 33 SB3783 Service Bulletin No: 32-029 Date: Feb 08/21 Rev. No. 1 Date: Aug 06/21 Page 23 of 26 SERVICE BULLETIN Nose Landing Gear - Cylinder Pipe - Repair Figure 3 SB4103 A B C A B C 1 mm (0.04 in) MASKING MASKING CYLINDER PIPE HARD CHROME PLATE NOSE WHEEL FORK CYLINDER PIPE HARD CHROME PLATE SEALANT CYLINDER PIPE OUTSIDE DIAMETER 'X' MASKING C APPLICATION OF SEALANT NOSE WHEEL FORK NOSE WHEEL FORK 1 1 1 THE HARD CHROME PLATE CAN PROTRUDE OR BE FLUSH NOTE: Service Bulletin No: 32-029 Date: Feb 08/21 Rev. No. 1 Date: Aug 06/21 Page 24 of 26 SERVICE BULLETIN Nose Landing Gear - Cylinder Pipe - Repair Figure 4 SB4111 A B A B USE OF ABRASIVE CLOTH B B PRIMED SEALANT APPLICATION MASKING TAPE MASKING TAPE MATERIAL No. P02-009 OR P02-011 MATERIAL No. P07-001 MATERIAL No. P08-018 OR P08-071 Service Bulletin No: 32-029 Date: Feb 08/21 Rev. No. 1 Date: Aug 06/21 Page 25 of 26 SERVICE BULLETIN Feedback sheet for accomplishment of SB 32-029 The purpose of this feedback sheet is to provide CAMP with the current information on each individual PC-12/47E series aircraft. Please complete the grey cells as appropriate using black ink and block letters. Print out and send the completed feedback sheet to: fax@campsystems.com Information Please identify your aircraft status by ticking the correct option We have embodied/accomplished this SB Fully We will not embody/accomplish this SB Partially The undersigned confirms the accomplishment of this Service Bulletin Date of accomplishment Name Signature Comments (procedure, kit quality, suggested improvements, etc.) Service Bulletin No: 32-029 Date: Feb 08/21 Rev. No. 1 Date: Aug 06/21 Page 26 of 26 SERVICE BULLETIN INTENTIONALLY BLANK