Service Bulletin - Nose Landing Gear Actuator Downlock Pin Inspection

thru R18201999 thru R18202031 thru R18202039 thru 57575 thru 21057840 thru 21058085 thru 21058139 thru 21058220 thru 21058510 thru 21058715 thru 21058818 thru 21058936 thru 21059061 thru 21059199 thru 21059351 thru 21059502 thru 21059719 thru 21060089 thru 21060539 Page 1 of 4 - To obtain satisfactory results, procedures specified in this publication must be accomplished in accordance with accepted methods and prevailing government regulations. The Cessna Aircraft Company cannot be responsible for the quality of work performed in accomplishing the requirements of this publication. The Cessna Aircraft Company, Product Support, P.O. Box 7706, Wichita, Kansas 67277, U S A . (316) 941 -7550, Facsimile (316) 942-9006 COPYRIGHT @ 1995 ACCOMPLISHMENT INSTRUCTIONS thru 21061039 thru 21061041 thru 21061573 thru 21062273 thru 21062954 thru 21063640 thru 21064135 thru 21064535 thru 21064772 thru 21064822 thru 21064897 thru 21064949 thru 21065009 thru T210-0197 thru T210-0307 thru T210-0392 thru T210-0454 thru P21000150 thru P21000385 thru P21000590 thru P21000760 thru P21000811 thru P21000834 thru P21000866 thru P21000874 FRl82OOOOl thru FRl8200020 FRl82OOO2l thru FRl82OOO45 FRl82OOO46 thru FRl82OOO7O DESCRIPTION The following procedures provide instructions to inspect the nose landing gear actuator downlock pins for looseness and wear. APPROVAL FAA approval has been obtained on technical data in this publication that affects airplane type design. For Reims Aviation airplanes: DGAC approval has been obtained on technical data in this publication that affects airplane type design. Page 2 ACCOMPLISHMENT INSTRUCTIONS REFERENCE CHANGE IN WEIGHT AND BALANCE MODEL . . . . . . . . . . . . . . . . . . . . . . 172RG, R182, TR182, F182RG, 210B, 210C, 210D, 210E, 21OF, 21OG, 21OH, 21OJ, 21OK, 21OL, 21OM, 21ON, 21OR, T21OF, T21OG, T21OH, T21OJ, P21ON, P21OR. WEIGHT INCREASE . . . . . . . . . . . . No Change. MATERIAL INFORMATION None. ACCOMPLISHMENT INSTRUCTIONS 1. Inspect Nose Landing Gear Actuator Pins : - A. Jack the airplane off the ground in accordance with the airplane service manual. B. With Master Switch in the OFF position and the hydraulic pump circuit breaker disengaged, select GEAR UP on the gear handle. Turn the Master Switch to the ON position and momentarily engage hydraulic pump circuit breaker. When gear begins to retract, disengage hydraulic pump circuit breaker and place Master Switch to the OFF position. C. Disconnect all electrical power from the airplane. Attach maintenance warning tags to the battery connector and external power receptacle stating: - WARNING: DO NOT CONNECT ELECTRICAL POWER - MAINTENANCE IN PROGRESS. D. Support nose wheel so pressure is off the actuator pins. E. (Refer to Figure 1, Sheet 1, Detail A.) Visually inspect actuator pins while physically attempting to rotate and/or move actuator pins about all three axes in the bearing end. No movement is allowed, as pins are a press fit. NOTE: It is permissible to use locking-type needle nose pliers to check for actuator pin looseness/movement, provided serrated teeth are removed from pliers and no galling marks are transmitted to the actuator pins. F. If any looseness or movement is observed: (1) Install SK210-55 prior to further flight. G. If looseness or movement is not observed, repetitive inspections of the nose gear actuator pins shall be accomplished per the compliance section of this service bulletin. 2. Make an entry in the airplane logbook stating compliance with this service bulletin and method of compliance, and if applicable, when the next inspection is due. Page 3 ACCOMPLISHMENT INSTRUCTIONS * NOTE: ILLUSTRATION SHOWS 182RG NOSE GEAR. ACTUATOR ATTACHES IN SIMILAR MANNER FOR ALL 172RG AND 210 MODELS. * NOSE LANDING GEAR INSPECT ACTUATOR PINS FOR LOOSENESS OR MOVEMENT WHILE STILL ON AIRPLANE DETAIL A Figure 1. Downlock Actuator Pin Inspection (Sheet 1) Page 4 w ' I single-~ngine SERVICE KIT dCessna ATextmn Company TITLE DOWNLOCK ACTUATOR PIN REPLACEMENT EFFECTIVITY Model 172RG 172RG 172RG 172RG 172RG 172RG 172RG R182 R182iTR Serial Numbers thru l72RGO57O thru l72RGO89O thru l72RGlO99 thru 172RG1144 thru l 7 2 R G l l 7 7 thru l 7 2 R G l l 9 l thru R18200583 thru R18201313 thru Rl82Ol628 thru Rl82Ol798 thru Rl82Ol928 thru Rl82Ol973 thru Rl82Ol999 thru R18202031 thru R18202039 thru 57575 thru 21057840 thru 21058085 thru 21058139 thru 21058220 thru 21058510 thru 21058715 thru 21058818 thru 21058936 thru 21059061 thru 21059199 thru 21059351 thru 21059502 thru 21059719 thru 21060089 December 29, 1995 Page 1 of 6 To obtain satisfactory results, procedures specified in this publication must be accomplished in accordance with accepted methods and prevailing government regulations. The Cessna Aircraft Company cannot be responsible for the quality of work performed in accomplishing the requirements of this publication. The Cessna Aircraft Company, Product Support, P.O. Box 7706, Wichita, Kansas 67277, U.S.A. (316) 941-7550, Facsimile (316) 942-9006 COPYRIGHT 0 1995 SERVICE KIT Model - SK210-155 Serial Numbers thru thru thru thru thru thru thru thru thru thru thru thru thru thru thru thru thru thru thru thru thru thru thru thru thru thru thru thru thru DESCRIPTION To replace the 1280209-1 pins in the nose landing gear actuator bearing end. APPROVAL FAA approval has been obtained on technical data in this publication that affects airplane type design. For Reims Aviation airplanes: DGAC approval has been obtained on technical data in this publication that affects airplane type design. Page 2 SERVICE KIT REFERENCE CHANGE IN WEIGHT AND BALANCE MODEL . . . . . . . . . . . . . . . . . . . . . . 172RG, R182, TR182, F182RG, 210, T210, P210 WEIGHT INCREASE . . . . . . . . . . . . Negligible. MATERIAL INFORMATION PART NUMBER QUANTITY DESCRIPTION SK210-155 1 Kit, consisting of the following parts: MS24665-134 1 Pin-Cotter MS16562-20 2 Pin-Roll 1290009-2 2 Pin 1290009-3 1 Tool-Drill 1 Instructions - NOTE: Nose gear actuator contains o-rings and packings which must be replaced during reassembly procedures. Refer to the applicable airplane Illustrated Parts Catalog for specific o-ring and packing part numbers. ACCOMPLISHMENT INSTRUCTIONS 1. Remove and Disassemble Nose Gear Actuator From Airplane: A. Jack the airplane off the ground in accordance with the airplane service manual. B. With Master Switch in the OFF position and the hydraulic pump circuit breaker disengaged, select GEAR UP on the gear handle. Turn the Master Switch to the ON position and momentarily engage hydraulic pump circuit breaker. When gear begins to retract, disengage hydraulic pump circuit breaker and place Master Switch to the OFF position. C. Disconnect all electrical power from the airplane. Attach maintenance warning tags to the battery connector and external power receptacle stating: WARNING: DO NOT CONNECT ELECTRICAL POWER - MAINTENANCE IN PROGRESS. D. Disconnect and remove the nose landing gear actuator assembly from the nose landing gear (bearing end) and fuselage (aft attach end). Cap or plug lines and fittings. (Refer to airplane service manual.) E. Disassemble the nose gear actuator to gain access to the bearing end. (Refer to airplane service manual.) F. Drive out existing roll pins (one per side) securing lock pins to bearing end. Remove and discard the existing 1280209-1 lock pins from the bearing end. (Refer to airplane service manual.) Page 3 SERVICE KIT 2. Inspect Bearing End For Out of Tolerance Condition: .- A. lnspect the lock pin holes in the bearing end for excessive wear and or elongation. Measure the diameter of the holes with a micrometer. The maximum allowable hole diameter is 0.3760 inch. B. If either of the holes in the bearing end are out of tolerance, replace the bearing end and proceed to Step 3.1. C. If both of the holes are within tolerance, proceed to step 3. 3. Install The 1290009-2 Lock Pins: A. Insert the 1290009-3 drill tool in pin hole on one side of bearing end. (Refer to Figure 1, Sheet 2, Detail B.) B. Secure the drill tool to the bearing end by inserting a 5/64 inch rod (or equivalent sized drill bit) through drill tool into the existing roll pin hole. NOTE: Drill tool contains three holes. The center hole is used to guide the drill bit when boring a new hole in the bearing end. The left and right holes are used to position the tool in the bearing end. Placement of the 5/64 inch rod in the left or right hole is dependent on which side of the bearing end is being drilled. C. With drill tool in place, drill a 5/64 (0.0781 inch diameter) hole through the center line hole in the drill tool, all the way through the bearing end. Take care to drill with minimum pressure so the drill bit does not wander. (Refer to Figure 1, Sheet 2, Detail B.) D. Using the alignment groove on the 1290009-3 drill tool, place a mark on the bearing end for aligning the pin. E. Remove the drill tool from the bearing end. -F. Repeat steps 3.A. thru 3.E. on the other side of the bearing end. G. Insert the new 1290009-2 pins in the bearing end. (Refer to Figure 1, Sheet 2, Detail C.) Ensure the alignment slot in the pin matches with the alignment mark on the bearing end created in step 3.D. Press the pins in so they protrude through the inside bearing surface 0.325 inch, f 0.005 inch. This will ensure the downlock assembly does not contact the pins when the actuator is retracted. NOTE: The hole in the new pin is larger than the 5/64 inch hole drilled in step 3.C. This is to allow for slight misalignment of the pin with the hole. It may be necessary to heat the bearing end and/or cool the pins to fit them together, as they are nominally an interference fit. H. Secure the pins with MS16562-20 roll pins inserted through the newly drilled 5/64 inch hole. I. Reassemble the actuator using new o-rings. (Refer to airplane service manual.) J. Reinstall the nose landing gear actuator using retained hardware and new MS24665-134 cotter pin. (Refer to airplane service manual.) K. Rig the nose landing gear per the airplane service manual. L. Restore electrical power and cycle the gear up and down a minimum of three times to ensure landing gear has been properly rigged. 4. Remove airplane from jacks and make an entry in the airplane logbook stating this service kit has been installed. Page 4 SERVICE KIT NOSE LANDING GEAR ACTUATOR (REFERENCE) MODEL 172RG SHOWN, OTHER MODELS TYPICAL NOSE LANDING GEA (REFERENCE) DETAIL A Figure 1. Downlock Actuator Pin Replacement (Sheet 1 of 2) Page 5 SERVICE KIT SK210-155 DRILL 5/64 (0.0781) INCH DIAMETER) HOLE (2 REQUIRED) 1280600 BEARING END 1290009-3 DRILL TOOL ALIGNMENT GROOVE AND INDEX MARK DETAIL B (REFERENCE) DRILL TOOL PLACED ON BEARING END 1290009-2 PIN (2 REQUIRED) NOTE: ROTATIONAL TOLERANCE THE ALIGNMENT MARK IS APPROXIMATELY 2 5". IT MAY DETAIL C BENECESSARYTOHEAT THE BEARING END AND/OR NEW HOLE DRILLED, DRILL TOOL REMOVED COOL THE PINS TO FIT THEM TOGETHER AS THEY ARE NOMINALLY AN INTERFERENCE FIT. Figure 1. Downlock Actuator Pin Replacement (Sheet 2) Page 6