Installation of the One or Eleven O'clock Strut and Strut Bushing [CFMB]

TASK 78-32-11-400-001-A
Installation of the One or Eleven O'clock Strut and Strut Bushing

FIN: 1000EM1 ** ON A/C NOT FOR ALL
FIN: 1000EM2 ** ON A/C NOT FOR ALL

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 1M(3 FT)
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 40 and 31 lbf.in (0.45 and 0.35 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CP2242)	RTV 732
(Material No.CP2243)	sealant
(Material No.CP2267)	RTV 106

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
437AL, 438AR, 451AL, 452AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR, 461AL, 462AR

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
31	PIN ASSEMBLY	AIPC 78-32-01-02-080
20	NUTS	AIPC 78-32-01-02-100
40	BUSHING	AIPC 78-32-01-02-110

E. Referenced Information

REFERENCE	DESIGNATION
TASK 71-13-00-010-040-B	Opening of the Fan Cowl Doors
TASK 71-13-00-410-040-B	Closing of the Fan Cowl Doors
TASK 78-30-00-081-041-B	Make the Thrust Reverser Serviceable after Maintenance
TASK 78-30-00-481-041-B	Make the Thrust Reverser Unserviceable for Maintenance
TASK 78-36-00-010-040-B	Opening of the Thrust Reverser Doors
TASK 78-36-00-410-040-B	Closing of the Thrust Reverser Doors
Replacement of the One or Eleven O'clock Strut and Strut Bushing

3. Job Set-up
Subtask 78-32-11-860-050-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) On the center pedestal, on the ENG panel 115VU, make sure that a WARNING NOTICE(S) is in position to tell persons not to start the engine.
(2) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off. Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).
(3) Make sure that:

the slats and flaps are retracted,
the throttle control levers operate at minimum power (0 degree).

(4) On the slats and flaps control levers, make sure that a WARNING NOTICE(S) is in position to prevent use of them.
(5) Make sure that the ACCESS PLATFORM 1M(3 FT) is in position.

Subtask 78-32-11-010-061-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Make sure that the fan cowl doors are open: (Ref. AMM TASK 71-13-00-010-040)
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Make sure that the thrust reverser doors are open: (Ref. AMM TASK 78-36-00-010-040)
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR

Subtask 78-32-11-040-055-A ** ON A/C NOT FOR ALL

C. Make sure that the thrust reverser is unserviceable (Ref. AMM TASK 78-30-00-481-041).

4. Procedure
Subtask 78-32-11-420-050-A ** ON A/C NOT FOR ALL

A. Installation of the One or Eleven O'clock Strut and Strut Bushing on the Left or Right Half Door as follows:
(1) Installation of the one or eleven o'clock strut:
(a) Attach the strut to the 12 o'clock inner cut corner with four screws (80), four screws (90) and eight nuts (100). Do not torque at this time.
(2) Installation of the one or eleven o'clock strut bushing:

PRE SB RA32078-72

(a) Install the bushing (40) on the pin assembly (30).

NOTE: If the bushing is worn or damaged, you must replace the AIPC 78-32-01-02-110 BUSHING (40).

(b) Install the pin assembly (30) on the strut (70).

END OF PRE SB RA32078-72

POST SB RA32078-72

(c) Install the pin assembly (31) on the strut (70).

NOTE: If the pin assembly (31) is worn or damaged you must replace the entire AIPC 78-32-01-02-080 PIN ASSEMBLY (31).

END OF POST SB RA32078-72

(d) Install the two screws (10) and two new nuts (20).
(e) TORQUE the nuts (100) and the AIPC 78-32-01-02-100 NUTS (20) to between 40 and 31 lbf.in (0.45 and 0.35 m.daN )

.
(3) Apply sealant:

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

(a) Apply a bead of sealant (Material No.CP2243) around the edges of the angle fittings (2 places) on the 12 o'clock inner cut corner and on the strut. Let the sealant dry for 30 to 48 hours at 20-25°C (68-76°F).
(b) Apply a bead of RTV 732 (Material No.CP2242) to fill the clearance between the strut and the core cowl. Let cure for 24 hours at 20-25°C (68-76°F).
(c) Apply a layer of RTV 106 (Material No.CP2267) on the pin (IPL 5-10) and nuts to make the joint with the MA25S layer. Make the sealant smooth with the aerodynamic surfaces. Let cure for 2 hours at 20-25°C (68-76°F).
(4) Install the access door (50) with screws (60) (5 positions).

5. Close-up
Subtask 78-32-11-410-050-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the thrust reverser cowl doors: (Ref. AMM TASK 78-36-00-410-040)
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR

Subtask 78-32-11-440-050-A ** ON A/C NOT FOR ALL

B. Make the thrust reverser serviceable: (Ref. AMM TASK 78-30-00-081-041).

Subtask 78-32-11-410-051-A ** ON A/C NOT FOR ALL

C. Close Access
(1) Close the fan cowl doors: (Ref. AMM TASK 71-13-00-410-040)
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Remove the access platform(s).
(3) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 03:25:46 UTC