Functional Check of Fan Cowl Latch Tension [IAE]

TASK 71-13-00-800-010-A
Functional Check of Fan Cowl Latch Tension

1. Reason for the Job
Refer to the MPD TASK: 711300-I2
FUNCTIONAL CHECK OF FAN COWL LATCH TENSION

NOTE: SBN71-0331 (equivalent to Airbus service bulletin SB 71-1069) introduces a lockable latch in the forward position (latch number 1) that must be opened and closed and locked with a key and flag assembly. The key and flag assembly are stowed in the cockpit and must not be used if there is damage to the key or flag.

2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
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 71-13-00-010-010-A	Opening of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 71-13-00-410-010-A	Closing of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 71-13-00-800-011-A	Adjustment of the Fan Cowl Spigots and Bumpers
TASK 71-13-00-800-011-A	Adjustment of the Fan Cowl Spigots and Bumpers (for corrective action)
Spigot and Bumper Adjustment

3. Job Set-up
Subtask 71-13-00-941-054-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).

4. Procedure
Subtask 71-13-00-720-050-A ** ON A/C NOT FOR ALL

A. Do this test:

ACTION	RESULT
Use feeler gages to measure Dimension X.	Dimension X should be 0 in. (0.0 mm).
If Dimension X is not 0 in. (0.0 mm) adjustment is necessary (Ref. AMM TASK 71-13-00-800-011).

Subtask 71-13-00-010-053-A ** ON A/C NOT FOR ALL

B. Open each of the four latches on the fan cowls (Ref. AMM TASK 71-13-00-010-010)

NOTE: The tension on each latch is measured with the other three latches in the closed position.

(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR.

Subtask 71-13-00-720-051-B ** ON A/C NOT FOR ALL

C. Do this test:

Spigot and Bumper Adjustment ** ON A/C NOT FOR ALL

ACTION	RESULT
Use the SPRING BALANCE 30 DAN (72 LBF) on the end of the latch handle (15) and measure the force necessary to close each of the four latches.	The force necessary to close each of the four latches must be between 30 lbf (13.34 daN) and 40 lbf (17.79 daN). If the force is not in the limits given, adjustment is necessary (Ref. AMM TASK 71-13-00-800-011).

5. Close-up
Subtask 71-13-00-410-053-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) Make sure the fan cowls are closed correctly (Ref. AMM TASK 71-13-00-410-010).
(3) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(4) FOR [1000EM2] (ENGINE-2)
447AL 448AR.
(5) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 02:29:12 UTC