General Visual Inspection of Fan Cowl Door Hinge Fittings [CFMI]

TASK 71-13-13-220-040-A
General Visual Inspection of Fan Cowl Door Hinge Fittings

1. Reason for the Job
Refer to the MPD TASK: 711300-01
GENERAL VISUAL INSPECTION OF FAN COWL DOOR HINGE FITTINGS
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	FLASHLIGHT
No specific	AR	MIRROR - INSPECTION
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

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

C. Referenced Information

REFERENCE	DESIGNATION
TASK 71-13-00-010-040-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-040-A	Closing of the Fan Cowl Doors
TASK 71-13-13-000-040-A	Removal of the Fan Cowl Door Latches and Keepers
TASK 71-13-13-220-041-A	Detailed Inspection of the Keeper Assy Fan Cowl Locking Device
TASK 71-13-13-400-040-A	Installation of the Fan Cowl Door Latches and Keepers

3. Job Set-up
Subtask 71-13-13-941-053-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 71-13-13-010-053-A ** ON A/C NOT FOR ALL

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

4. Procedure
Subtask 71-13-13-220-051-B ** ON A/C NOT FOR ALL

A. Do a visual inspection of the Fan Cowl Latches, Fittings and Hinges as follows:
(1) Visual Inspection of the Left Hand Fan Cowl Latches
(a) Examine the fan cowl latches for damage and distortion. If damage is found, replace the damaged part (Ref. AMM TASK 71-13-13-000-040) and (Ref. AMM TASK 71-13-13-400-040).
(b) Visually inspect the fan cowl latches for cracks. If any cracks are found, replace the latch (Ref. AMM TASK 71-13-13-000-040) and (Ref. AMM TASK 71-13-13-400-040).
(c) Examine the fan cowl latches for nicks, scratches, gouges, or excessive wear. If damage or wear is more than 0.01 in. (0.25 mm) in depth, replace the latch (Ref. AMM TASK 71-13-13-000-040) and (Ref. AMM TASK 71-13-13-400-040).
(d) Examine the fan cowl latches for a weak spring. If a weak spring is found, replace the latch (Ref. AMM TASK 71-13-13-000-040) and (Ref. AMM TASK 71-13-13-400-040).

NOTE: A weak handle spring has no effect on the latching mechanism, however it reduces the handle opening angle and its visibility when hanging down.

NOTE: You should use a FLASHLIGHT and an MIRROR - INSPECTION to examine areas of the fan cowl latches that are hard to see.

(e) Make sure that the fan cowl latches are attached correctly. Tighten or replace the attachment hardware, as necessary (Ref. AMM TASK 71-13-13-000-040) and (Ref. AMM TASK 71-13-13-400-040).
(2) Visual inspection of the key and flag and latch bracket

CAUTION: DO NOT USE A KEY WITHOUT FLAG TO OPERATE THE FAN COWL DOOR. DO NOT STOW A KEY WITHOUT FLAG IN THE COCKPIT. WHEN YOU USE AND STOW THE KEY, MAKE SURE THAT IT HAS A FLAG ATTACHED TO IT. IF THE FLAG IS MISSING OR DAMAGED, IT MUST BE REPLACED BEFORE THE KEY CAN BE USED OR STOWED AGAIN.

(a) Make sure that the key and flag assembly is not damaged in any way.
(b) Make sure that there are no signs of corrosion, cracks or damage on the latch bracket.
(c) If one or more of these parts are damaged, replace as necessary.
(3) Visual Inspection of the Right Hand Fan Cowl Adjustable Keepers (Ref. AMM TASK 71-13-13-220-041)
(4) Visual Inspection of the Left and Right Hand Fan Cowl Hinges
(a) Visually inspect the fan cowl hinges for cracks. If any cracks are found, replace the hinge.
(b) Make sure that the fan cowl hinges are attached correctly. Tighten or replace the attachment hardware, as necessary.

5. Close-up
Subtask 71-13-13-410-053-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 fan cowl doors (Ref. AMM TASK 71-13-00-410-040):
(3) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(4) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(5) Remove the access platform(s).
(6) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 02:22:32 UTC