# 49600 - 32 - 64 R3



# SERVICE BULLETIN

HIGHLIGHTS Dec 15/11 Page 1 of 1 

### CRJ MAIN LANDING GEAR RETRACTION ACTUATOR ASSEMBLY

– INTRODUCTION OF NEW CONFIGURATION REVISION NO. 3

– December 15 , 2011

Service Bulletin 49600
- 32
- 64 Revision 3 supers edes Service Bulletin 49600
- 32
- 64 R2 dated Jun 1 7 /11 and is reissued in its entirety with the changes listed below. The compliance in the previous issue of this Service Bulletin is not affected by this revision. No additional rework is introduced by this revision. Please destroy all copies of SB 49600
- 32
- 64 R2 dated Jun 17/11

.
Page/Para Change Page 2, Section I, Para 8, Par a 12 Commercial information revised, reference information updated. Page 2 , Section II, Para 1H

. Required c orrosion i nhibiting c ompou nd revised and warning deleted. Page 3 , Section II, Para 2 B. Optional marking method for servi ce bulletin incorporation added.

# 49600 - 32 - 64 R3



# SERVICE BULLETIN

Dec 15 /11 Page 1 of 3 THESE COMMODITIES, SOFTWARE OR TECHNOLOGY WERE EXPORTED/RE
- EXPORTED IN ACCORDANCE WITH U.S. EXPORT ADMINISTRATION REGULATION. DIVERSION CONTRARY TO U.S. LAW IS PROHIBITED. Reference Goodrich CMM for propr ietary information 

### CRJ MAIN LANDING GEAR R ETRACT ION ACTUATOR ASSEMBLY

– INTRODUCTION OF NEW CONFIGURATION

----------------------------------------------------------------------------------------------------------------------------- --------- 

### SECTION I - PLANNING INFORMATION 1. EFFECTIVITY Retract ion Actuator Assembly PN 49600
- 5/
- 7/
- 11, SN SPP0001 to SPP 0388 a nd SPP020 389 to SPP 021300 and SPP011 301 to SPP011318 , SPP011355 and SPP011356. 2. CONCURRENT REQUIREMENTS NA 3

. REASON Problem/Condition A p otential exists for rod end play and subsequent wear on rod end threads on the r etract ion a ctuator a s sembly

. Enhanced corrosion protection is required at mating threads of lock nut/ gland nut interface

. Objective/Benefit This service bulletin is issued to introduce retract actuator assembly PN 49600
- 13 with rod end jam nut made from CRES and includes assembly wit h corrosion inhibiting compound applied to the gland nut threads

. 4 . DESCRIPTION The retract actuator assembly is reworked and reidentified. 5 . COMPLIANCE Goodrich Landing Gear recommends incorporation of this bulletin at operator’s earliest convenience

. 6 . APPROVAL The technical content of this Service Bulletin has been approved under the authority of the TCCA Design Approval Organization No

. DAO#93
- Q
- 02. 7 . MANPOWER No additional man
- hours are required to accomplish this Service Bulletin at next shop visit. Approximately 2 .0 man
- hours are required to do this Service Bulletin.

# 49600 - 32 - 64 R3 Goodrich Landing Gear Division Goodrich Aerospace Canada Ltd.

Dec 15 /11 Page 2 of 3 Reference Goodrich CMM for proprietary information 8 . MATERIAL COST AND AVAILABILITY Refer to Goodrich Landing Gear Service Information Letter (SIL 02121
- 32
- 51) for commercial terms related to this Service Bulletin. Order parts as required from : Goodrich Landing Gear Tel: 1
- 905
- 827
- 7777 1400 South Service Rd, Fax: 1
- 905
- 825
- 1583 Oakville, Ontario, Canada L6L 5Y7 Att: Spares Administrator 9 . TOOLING Goodrich Landing Gear has a rotable pool of Assembly Fixture AT
- 56761 and Test Fixture TF 57376 available from the address shown in Para. 8 above. 10 . WEIGHT AND BALANCE NA 1 1 . ELECTRICAL LOAD DATA NA 1 2 . REFERENCES Goodrich Landing Gear Component Maintenance Manual 32
- 1 1
- 28 Goodrich Landing Gear Service Information Letter (SIL) 02121
- 32
- 51 1 3 . OTHER PUBLICATIONS AFFECTED Goodrich Landing Gear Component Maintenance Manual 32
- 11
- 28

------------------------ --------------------------------------------------------------------------------------------------------------



### SECTION II - ACCOMPLISHMENT INSTRUCTIONS NOTE: Item numbers in parenthesis () refer to CMM 32
- 1 1
- 28 IPL Figure
- Item number

. 1. Rework A. Install retraction actuator assembly in fixture (AT
- 56761), unlock cup washer (1
- 110)

. B. Loosen and r emove lock nut (1
- 100)

. NOTE: Do not remove gland nut (1
- 130) from cylinder (1
- 280). C. Remove jam nut (1
- 70) from rod end (1
- 80). Discard jam nut (1
- 70) (Ref. CMM 32
- 11
- 28 DISASSEMBLY)

. D. Clean threads with solvent and a lint free cloth. E. Apply corrosion inhibiting compound (CA1000) t o gland nut (1
- 130) threads. F. Apply dry film lubricant to rod end threads per MIL
- L
- 23398 or MIL
- PRF
- 46010. WARNING : DELETED G. Apply corrosion inhibiting compound ( CA 1000 ) to threads of piston (1
- 1 9 0). H. Install jam nut PN 49606
- 5 on rod end

. I. Coat cup washer (1
- 110) with lubricant ( skydrol lube, MCS 352) on face that contacts lock nut (1
- 100) and assemble retraction actuator assembly (R ef. CMM 32
- 11
- 28 ASSEMBLY).

# 49600 - 32 - 64 R3 Goodrich Landing Gear Division Goodrich Aerospace Canada Ltd.

Dec 15 /11 Page 3 of 3 Reference Goodrich CMM for proprietary information NOTE: Do not torque jam nut at this time. J

. Use tool TF 57376 to set actuator assembly retracted length per CMM requirements (Ref. CMM 32
- 11
- 28 TESTING AND FAULT ISOLATION). K

. Torque jam nut PN 49606
- 5 and safety with lockwire per CMM requirements. L

. Apply torque seal (F925) at lock nut/gland nut interface and rod end/jam nut/piston interface. M

. Fillet seal all around both sides of jam nut using sealant per MIL
- A
- 461 46, MIL
- PRF
81733 Type II, AMS

– S
- 8802 Cl ass B (DC 3145, DC738 or RTV162 )

. 2

. Re - identif ication A. Reidentify retraction actuator assembly PN 49600
- 11 as retraction actuator assembly PN 49600
- 13. B. For all other configurations record incorporation of this service b ulletin and date accomplished in MOD STATUS field of nameplate (1
- 60). NOTE: As an option for all other configurations, it is acceptable , in addition to the MOD STATUS to record incorporation of this service bulletin by adding letter ‘A’ after the serial number on nameplate (1
- 60). Apply clear lacquer (Akzo 683
- 3
- x or equivalent) over ink stamp. The optional marking method does not alter the OEM serial number and facilitates operator tracking.



### ----------------------------------------------------------------------------------------------------------------------- -- SECTION III - MATERIAL INFORMATION New PN Qty * Keyword Old PN Qty Disposition 49600
- 13 1 Retraction Actuator 49600
- 11 1 Rework 49606
- 5 1 Jam Nut 49606
- 3 1 Discard 49620
- 1 1 Cup Washer 49620
- 1 1 Discard