Installation Blocker Door Stow-switch [CFMI]

TASK 78-31-18-400-040-A
Installation Blocker Door Stow-switch

FIN: 4104KS1 ** ON A/C NOT FOR ALL
FIN: 4104KS2 ** ON A/C NOT FOR ALL
FIN: 4104KS3 ** ON A/C NOT FOR ALL
FIN: 4104KS4 ** 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	PLIERS - NOSE, SOFT, LONG
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 70 and 61 lbf.in (0.79 and 0.69 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CP2267)	RTV 106

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-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-040-A	Closing of the Fan Cowl Doors
TASK 78-30-00-081-041-A	Make the Thrust Reverser Serviceable after Maintenance
TASK 78-30-00-481-041-A	Make the Thrust Reverser Unserviceable for Maintenance
TASK 78-31-00-710-040-A	Operational Test of the Thrust Reverser System
TASK 78-31-00-710-040-A-01	Operational Test of the Thrust Reverser without CFDS - Engine not Running
TASK 78-31-00-710-040-A-02	Operational Test of the Thrust Reverser without CFDS - Engine Running
TASK 78-32-41-080-040-A	Removal of the Safety Sleeve from Blocker Door Actuator
TASK 78-32-41-860-041-A	Manual Stowing of the Blocker Door
Blocker Door Stow Switch

3. Job Set-up
Subtask 78-31-18-860-059-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 ACCESS PLATFORM 1M(3 FT) is in position.

Subtask 78-31-18-010-057-A ** ON A/C NOT FOR ALL

B. Make sure that the fan cowl doors are open: (Ref. AMM TASK 71-13-00-010-040)
(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR

Subtask 78-31-18-040-055-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 78-31-18-420-051-A ** ON A/C NOT FOR ALL

A. Installation of the blocker door stow-switch.
(1) Put the blocker door stow-switch on to the aft side of the forward frame.

Blocker Door Stow Switch ** ON A/C NOT FOR ALL

(2) Install the bolts and nuts which attach the stow-switch.
(3) TORQUE the bolts to between 70 and 61 lbf.in (0.79 and 0.69 m.daN )

.
(4) Apply sealant.

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

(a) Apply RTV 106 (Material No.CP2267) between the stow-switch and the forward frame.
(5) Connect the electrical harness on to the connector of the blocker door stow-switch.
(6) Tighten the coupling nuts of the stow-switch connector with the PLIERS - NOSE, SOFT, LONG.

5. Close-up
Subtask 78-31-18-080-051-A ** ON A/C NOT FOR ALL

A. Remove the safety sleeve (HIX-3005) from the blocker door actuator (Ref. AMM TASK 78-32-41-080-040).

Subtask 78-31-18-860-058-A ** ON A/C NOT FOR ALL

B. Bring blocker doors :

CAUTION: BLOCKER DOOR LATCH MUST BE OPENED WHEN YOU CLOSE THE BLOCKER DOOR OR DAMAGE CAN OCCUR.

(1) Manually bring blocker doors to stow position (Ref. AMM TASK 78-32-41-860-041).

Subtask 78-31-18-440-052-A ** ON A/C NOT FOR ALL

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

Subtask 78-31-18-410-053-A ** ON A/C NOT FOR ALL

D. 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).

Subtask 78-31-18-710-051-A ** ON A/C NOT FOR ALL

E. Do an operational test of the thrust reverser system from the CFDS (Ref. AMM TASK 78-31-00-710-040)

[Rev.10 from 2021] 2026.04.01 03:20:44 UTC