Installation of the Open Latch Indicator [IAE]

TASK 78-32-56-400-010-A
Installation of the Open Latch Indicator

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE PARTS AFTER THE ENGINE SHUTDOWN. USE APPLICABLE THERMAL GLOVES. THE ENGINE PARTS CAN STAY HOT FOR ONE HOUR AFTER SHUTDOWN AND CAN BURN YOU.

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	Torque wrench: range to between 105 and 85 lbf.in (1.19 and 0.96 m.daN )

B. 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

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 78-30-00-040-012-A	Deactivation of the Thrust Reverser Hydraulic Control Unit (HCU) for Ground Maintenance
TASK 78-30-00-440-012-A	Re-activation of the Thrust Reverser Hydraulic Control Unit (HCU) after Ground Maintenance
TASK 78-31-00-710-041-A	Operational Test of the Thrust Reverser System with the CFDS
TASK 78-31-00-710-041-A-02	Operational test of the Thrust Reverser without the CFDS and Engine Running
TASK 78-32-00-010-010-A	Opening of the Thrust Reverser Halves
TASK 78-32-00-410-010-A	Closing of the Thrust Reverser Halves
Open Latch Indicator Removal/Installation

3. Job Set-up
Subtask 78-32-56-941-054-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) On the ENG panel 115VU center pedestal:
(a) Put a warning notice to tell persons not to start the engine.
(b) Make sure that the engine shutdown occurred not less than 5 minutes before you do this procedure.
(2) 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 to tell persons not to energize the FADEC 1(2).

Subtask 78-32-56-010-052-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Open the fan cowls (Ref. AMM TASK 71-13-00-010-010):
(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 78-32-00-010-010):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR.
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR.

Subtask 78-32-56-941-055-A ** ON A/C NOT FOR ALL

C. Make sure that the thrust reverser hydraulic control unit is deactivated (Ref. AMM TASK 78-30-00-040-012)

4. Procedure
Subtask 78-32-56-020-052-A ** ON A/C NOT FOR ALL

A. Install the Open Latch Indicator
(1) Put the shims (4) and the open latch indicator (5) into position on the No. 6 strut fairing panel.
(2) Install the bolts (1) and (2) and washers (3) that attach the open latch indicator (5) to the No. 6 strut fairing panel.
(3) TORQUE the bolts (2) to between 105 and 85 lbf.in (1.19 and 0.96 m.daN )

.
(4) TORQUE the bolts (1) to between 105 and 85 lbf.in (1.19 and 0.96 m.daN )

Subtask 78-32-56-410-052-A ** ON A/C NOT FOR ALL

B. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the thrust reverser halves (Ref. AMM TASK 78-32-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR.
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR.
(3) Activate the thrust reverser hydraulic control unit (HCU) (Ref. AMM TASK 78-30-00-440-012).
(4) Close the fan cowls (Ref. AMM TASK 71-13-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR.
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR.
(5) Remove the warning notice.

Subtask 78-32-56-710-051-A ** ON A/C NOT FOR ALL

C. Operational Test
(1) Do an operational test of the thrust reverser system (Ref. AMM TASK 78-31-00-710-041).

NOTE: As an alternative procedure, you can do the operational test without the CFDS (Ref. AMM TASK 78-31-00-710-041).

[Rev.10 from 2021] 2026.04.01 03:29:14 UTC