Installation of the Upper Blocker Door [CFMB]

TASK 78-32-41-400-002-A
Installation of the Upper Blocker Door

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	AR	ACCESS PLATFORM 1M(3 FT)
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 45 and 35 lbf.in (0.51 and 0.40 m.daN )
No specific	Torque wrench: range to between 80 and 70 lbf.in (0.90 and 0.79 m.daN )
No specific	Torque wrench: range to between 797 and 531 lbf.in (9.01 and 6.00 m.daN )
No specific	Torque wrench: range to between 1022.7 and 925.3 lbf.in (11.56 and 10.46 m.daN )
HIX1003	1	HANDLING BRACKET-PIVOTING DOOR

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CP2104)	molykote G rapid
(Material No.CP2245)	finish paint EA4 blue 5991

C. Work Zones and Access Panels

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

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
20	COTTER PIN	AIPC 78-32-41-01-022
30	COTTER PIN	AIPC 78-32-41-01-022
20	COTTER PIN	AIPC 78-32-41-01-372
30	COTTER PIN	AIPC 78-32-41-01-372

E. 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 78-31-00-710-042-A	Operational Test of the Thrust Reverser System
TASK 78-31-00-710-043-A-01	Operational Test of the Thrust Reverser without CFDS - Engine Running
TASK 78-31-00-710-043-A	Operational Test of the Thrust Reverser without CFDS - Engine Not Running
TASK 78-31-00-710-043-A-01	Operational Test of the Thrust Reverser without CFDS - Engine Running
TASK 78-32-41-820-001-A	Alignment of the Blocker Door
TASK 78-32-41-860-002-A	Manual Stowing of the Blocker Door
Hydraulic Actuator
Deploy-Switch Access Door
Half Door Hinge Pins Access
Blocker Door Handling Sling (HIX1003)
Upper Blocker Door
Blocker Door

3. Job Set-up
Subtask 78-32-41-860-054-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 78-32-41-010-063-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 78-32-41-040-062-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 78-32-41-420-051-A ** ON A/C NOT FOR ALL

A. Installation of the Upper Blocker Door

CAUTION: DO NOT PUSH ON THE STOW SWITCH LEVER WHEN BLOCKER DOOR IS OPENED OR DAMAGE COULD OCCUR.

(1) Install the HIX1003 HANDLING BRACKET-PIVOTING DOOR:

Blocker Door Handling Sling (HIX1003) ** ON A/C NOT FOR ALL

(a) Install the handling sling on the blocker door where the actuator clevis was removed.
(b) Tighten the knurled knob to attach the sling.

NOTE: Apply a witness line of finish paint EA4 blue 5991 (Material No.CP2245) on all nuts and connections when you have done the check of their torques.

(2) Apply a thin layer of molykote G rapid (Material No.CP2104) on the pivot bolts.
(3) Put the blocker door in deployed position with a crane.
(4) Install the two pivot bolts, washers and the castellated nuts.

Upper Blocker Door ** ON A/C NOT FOR ALL

(5) Measure the breakaway torques (A) of the two castellated nuts.
(6) TORQUE each nut to between 1022.7 and 925.3 lbf.in (11.56 and 10.46 m.daN )

plus torque A.
(7) Loosen the two nuts.
(8) Measure the breakaway torques (B) of the two nuts again.
(9) TORQUE each nut to between 797 and 531 lbf.in (9.01 and 6.00 m.daN )

plus torque B.
(10) Install new AIPC 78-32-41-01-022 COTTER PIN (30) or AIPC 78-32-41-01-372 COTTER PIN (30) and AIPC 78-32-41-01-022 COTTER PIN (20) or AIPC 78-32-41-01-372 COTTER PIN (20).
(11) Apply a thin layer molykote G rapid (Material No.CP2104) on the contact finger pin.
(12) Attach the contact finger pin with the bolts.
(13) TORQUE the bolts to between 45 and 35 lbf.in (0.51 and 0.40 m.daN )

.
(14) Install the pivot access doors:
(a) Attach the two pivot access doors to the blocker door with the screws.
(b) TORQUE screws to between 45 and 35 lbf.in (0.51 and 0.40 m.daN )

.
(15) Install the hinge access panel:

Half Door Hinge Pins Access ** ON A/C NOT FOR ALL

(a) Attach the access panel to the top of the thrust reverser with the 12 screws.
(b) TORQUE the screws to between 45 and 35 lbf.in (0.51 and 0.40 m.daN )

.
(16) Remove the HIX1003 HANDLING BRACKET-PIVOTING DOOR:

Blocker Door Handling Sling (HIX1003) ** ON A/C NOT FOR ALL

(a) Loosen the knurled knob.
(b) Remove the blocker door handling sling.
(17) Install the hydraulic actuator clevis on the blocker door:

Hydraulic Actuator ** ON A/C NOT FOR ALL

(a) Attach the clevis on the blocker door with the four bolts and the washers.
(b) TORQUE the bolts to between 80 and 70 lbf.in (0.90 and 0.79 m.daN )

.
(18) Install the clevis access door on the blocker door:

Hydraulic Actuator ** ON A/C NOT FOR ALL

(a) Attach the clevis access door to the upper blocker door with the eight screws.
(b) TORQUE the screws to between 45 and 35 lbf.in (0.51 and 0.40 m.daN )

.
(19) Install the deploy-switch access door:

Deploy-Switch Access Door ** ON A/C NOT FOR ALL

(a) Attach the deploy-switch access door with the three screws.
(b) TORQUE the screws to between 45 and 35 lbf.in (0.51 and 0.40 m.daN )

.
(20) Stow the blocker door:

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

(a) Manually move the blocker door to the closed position (Ref. AMM TASK 78-32-41-860-002).
(21) Make sure that the blocker door is correctly aligned (Ref. AMM TASK 78-32-41-820-001).

Blocker Door ** ON A/C NOT FOR ALL

(a) Make sure that the lockout bolt hole in the blocker door is aligned with the fitting hole.

5. Close-up
Subtask 78-32-41-440-056-A ** ON A/C NOT FOR ALL

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

Subtask 78-32-41-410-057-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 fan cowls 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).

Subtask 78-32-41-710-058-A ** ON A/C NOT FOR ALL

C. Do an operational test:
(1) Do an operational test of the thrust reverser system (Ref. AMM TASK 78-31-00-710-042).

NOTE: As an alternative procedure you can do this operational test without the CFDS:

first method with engine not running (Ref. AMM TASK 78-31-00-710-043)
second method with engine running (Ref. AMM TASK 78-31-00-710-043).

[Rev.10 from 2021] 2026.04.01 13:11:41 UTC