Inspection/Check of the Latch Fitting Pin and Roller [CFMB]

TASK 78-32-41-200-041-A
Inspection/Check of the Latch Fitting Pin and Roller

1. Reason for the Job
This procedure gives instructions for the inspection, cleaning and the lubricating of the latch fitting pin and roller in case of seizing on the upper and lower pivoting door.
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)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CP1040)	methyl ethyl ketone
(Material No.CP5062)	MoS_2 dry film lubricant

C. Work Zones and Access Panels

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

D. 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 78-32-41-000-003-A	Removal of the Latch Fitting and Latch Back Plate
TASK 78-32-41-080-001-A	Removal of the Safety Sleeve from Blocker Door Actuator
TASK 78-32-41-400-003-A	Installation of the Latch Fitting and Latch Back Plate
TASK 78-32-41-480-001-A	Installation of the Safety Sleeve on Blocker Door Actuator
TASK 78-32-41-860-001-A	Manual Deployment of the Blocker Door
TASK 78-32-41-860-002-A	Manual Stowing of the Blocker Door
Inspection/Check of the Latch Fitting Pin and Roller
Lubrication of the Latch Fitting Pin and Roller

3. Job Set-up
Subtask 78-32-41-941-079-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) On the overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).

Subtask 78-32-41-010-107-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-040):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Put an ACCESS PLATFORM 1M(3 FT) in position.

Subtask 78-32-41-040-092-A ** ON A/C NOT FOR ALL

C. Make the thrust reverser unserviceable for maintenance (Ref. AMM TASK 78-30-00-481-041).

Subtask 78-32-41-010-109-A ** ON A/C NOT FOR ALL

D. Manually deploy the blocker door (Ref. AMM TASK 78-32-41-860-001).

Subtask 78-32-41-480-059-A ** ON A/C NOT FOR ALL

E. Install the safety sleeve on the blocker door actuator (Ref. AMM TASK 78-32-41-480-001).

Subtask 78-32-41-020-063-A ** ON A/C NOT FOR ALL

F. Removal of the pin and roller from the latch fitting
(1) Remove the pin and roller from the latch fitting (Ref. AMM TASK 78-32-41-000-003).

Subtask 78-32-41-110-053-A ** ON A/C NOT FOR ALL

G. Cleaning of the pin and roller
(1) Use a cotton cloth with methyl ethyl ketone (Material No.CP1040) to clean the pin and roller.

4. Procedure
Subtask 78-32-41-220-054-A ** ON A/C NOT FOR ALL

A. Do an inspection/check of the latch fitting pin and roller as follows:

INSPECT/CHECK	MAXIMUM SERVICEABLE LIMITS	REMARKS
1.Inspect the latch fitting pin for:
A.Wear	Refer to CFM56-5B Nacelle SRM 54-30-00 REPAIR 21 (Cage Code 51563).	Refer to CFM56-5B Nacelle SRM 54-30-00 REPAIR 21 (Cage Code 51563).
2.Inspect the latch fitting roller for:
A.Wear	Refer to CFM56-5B Nacelle SRM 54-30-00 REPAIR 21 (Cage Code 51563).	Refer to CFM56-5B Nacelle SRM 54-30-00 REPAIR 21 (Cage Code 51563).

5. Close-up
Subtask 78-32-41-640-052-A ** ON A/C NOT FOR ALL

A. Lubrication of the pin and roller

Lubrication of the Latch Fitting Pin and Roller ** ON A/C NOT FOR ALL

(1) Apply a thin coat of MoS_2 dry film lubricant (Material No.CP5062) on the pin and the internal diameter of the roller.
(2) Let the MoS_2 dry film lubricant (Material No.CP5062) dry for 5 minutes at ambient temperature.

Subtask 78-32-41-420-062-A ** ON A/C NOT FOR ALL

B. Installation of the latch fitting pin and roller
(1) Install the pin and roller on the latch fitting (Ref. AMM TASK 78-32-41-400-003).

NOTE: Make sure that the MoS_2 dry film lubricant (Material No.CP5062) is dry.

Subtask 78-32-41-080-059-A ** ON A/C NOT FOR ALL

C. Remove the safety sleeve from the blocker door actuator (Ref. AMM TASK 78-32-41-080-001).

Subtask 78-32-41-410-085-A ** ON A/C NOT FOR ALL

D. Manually stow the blocker door (Ref. AMM TASK 78-32-41-860-002).

Subtask 78-32-41-440-077-A ** ON A/C NOT FOR ALL

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

Subtask 78-32-41-410-083-A ** ON A/C NOT FOR ALL

F. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) 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
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 03:26:13 UTC