Detailed Visual Inspection of the Blocker Door Actuator [CFMI]

TASK 78-31-41-210-040-A
Detailed Visual Inspection of the Blocker Door Actuator

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
FIN: 3001KM1 ** ON A/C NOT FOR ALL
FIN: 3001KM2 ** ON A/C NOT FOR ALL
FIN: 3001KM3 ** ON A/C NOT FOR ALL
FIN: 3001KM4 ** 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)
HIX3005	1	SAFETY SLEEVE - PIVOTING DOOR ACTUATOR

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 71-13-00-010-040-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 78-31-41-000-040-A	Removal of the Blocker Door Hydraulic Actuators
TASK 78-31-41-400-040-A	Installation of the Blocker Door Hydraulic Actuators
TASK 78-32-41-080-040-A	Removal of the Safety Sleeve from Blocker Door Actuator
TASK 78-32-41-480-040-A	Installation of the Safety Sleeve on Blocker Door Actuator
TASK 78-32-41-860-040-A	Manual Deployment of the Blocker Door
TASK 78-32-41-860-041-A	Manual Stowing of the Blocker Door
TASK 78-36-00-010-040-A	Opening of the Thrust Reverser Doors
TASK 78-36-00-410-040-A	Closing of the Thrust Reverser Doors
AIPC 78-31-41-02
Blocker Door Actuator
Clevis Access Doors

3. Job Set-up
Subtask 78-31-41-941-058-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 78-31-41-010-062-A ** ON A/C NOT FOR ALL

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

Subtask 78-31-41-040-058-A ** ON A/C NOT FOR ALL

C. Make the thrust reverser system unserviceable (Ref. AMM TASK 78-30-00-481-041).

Subtask 78-31-41-010-065-A ** ON A/C NOT FOR ALL

D. Open the thrust reverser doors (Ref. AMM TASK 78-36-00-010-040):
(1) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR

Subtask 78-31-41-860-057-A ** ON A/C NOT FOR ALL

E. Deploy the blocker door manually (Ref. AMM TASK 78-32-41-860-040).

Subtask 78-31-41-480-054-A ** ON A/C NOT FOR ALL

F. Install the HIX3005 SAFETY SLEEVE - PIVOTING DOOR ACTUATOR on blocker door actuator (Ref. AMM TASK 78-32-41-480-040) .

4. Procedure
Subtask 78-31-41-210-055-A ** ON A/C NOT FOR ALL

A. Do a visual inspection of the clevis, the clevis access door and the blocker door actuator as follows :

INSPECT/CHECK	MAXIMUM SERVICEABLE LIMITS	REMARKS
1.Do the inspection of the clevis for:
A.Damage	No damage permitted	If you find some damage, replace the clevis. (Ref. AMM TASK 78-31-41-000-040) and (Ref. AMM TASK 78-31-41-400-040).
B.Crack	No crack permitted	If you find crack, replace the clevis. (Ref. AMM TASK 78-31-41-000-040) and (Ref. AMM TASK 78-31-41-400-040).
2.Inspect the related hardware of the clevis for :
A.Damage	No damage permitted	If you find some damage, replace the defective part. (Ref. AMM TASK 78-31-41-000-040) and (Ref. AMM TASK 78-31-41-400-040).
B.Bolts protrusion through the locking feature of the nut	Bolt must protrude a minimum of 1.5 threads through nut.	Replace bolt with the bolt with correct AIPC 78-31-41-02 .
3.Inspect the clevis access door and the related hardware for:
A.Damage	No damage permitted	If you find some damage, replace the defective part. (Ref. AMM TASK 78-31-41-000-040) and (Ref. AMM TASK 78-31-41-400-040).
B.Missing	No missing permitted	If you find missing, replace the defective part. (Ref. AMM TASK 78-31-41-000-040) and (Ref. AMM TASK 78-31-41-400-040).
4.Do the inspection of the related hardware of the blocker door actuator for:
A.Damage	No damage permitted	If you find some damage, replace the defective part. (Ref. AMM TASK 78-31-41-000-040) and (Ref. AMM TASK 78-31-41-400-040).
5.Do the inspection of the blocker door actuator for:
A.Crack	No crack permitted	If there is a crack, replace the blocker door actuator. (Ref. AMM TASK 78-31-41-000-040) and (Ref. AMM TASK 78-31-41-400-040).
B.Hydraulic leakage
(1)Static seals	More than 2 drops/10 min	Replace the actuator (Ref. AMM TASK 78-31-41-000-040) and (Ref. AMM TASK 78-31-41-400-040).
(2)Rod seals (system pressurized)	More than 30 drops/1 min	Replace the actuator (Ref. AMM TASK 78-31-41-000-040) and (Ref. AMM TASK 78-31-41-400-040).
(3)Rod seals (in operation)	More than 2 drops/cycle	Replace the actuator (Ref. AMM TASK 78-31-41-000-040) and (Ref. AMM TASK 78-31-41-400-040).
6.Do the inspection of the blocker door actuator rod for:
A.Scratch	No scratch permitted	If there is scratch, replace the actuator (Ref. AMM TASK 78-31-41-000-040) and (Ref. AMM TASK 78-31-41-400-040).

Subtask 78-31-41-210-058-A ** ON A/C NOT FOR ALL

B. Do a visual inspection of the locking indicator as follows :

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

INSPECT/CHECK	MAXIMUM SERVICEABLE LIMITS	REMARKS
1.Do the inspection of the locking indicator for:
A.Position	The locking indicator must be in unlock position	If the locking indicator is not in unlock position, replace the actuator (Ref. AMM TASK 78-31-41-000-040) and (Ref. AMM TASK 78-31-41-400-040)

Subtask 78-31-41-480-055-A ** ON A/C NOT FOR ALL

C. Remove the safety sleeve (HIX3005) from the blocker door actuator (Ref. AMM TASK 78-32-41-080-040).

Subtask 78-31-41-860-059-A ** ON A/C NOT FOR ALL

D. Move the blocker doors to

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

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

Subtask 78-31-41-210-059-A ** ON A/C NOT FOR ALL

E. Do a visual inspection of the locking indicator as follows :

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

INSPECT/CHECK	MAXIMUM SERVICEABLE LIMITS	REMARKS
1.Do the inspection of the locking indicator for:
A.Position	The locking indicator must be in lock position	If the locking indicator is not in lock position, replace the actuator (Ref. AMM TASK 78-31-41-000-040) and (Ref. AMM TASK 78-31-41-400-040)

5. Close-up
Subtask 78-31-41-410-064-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 thrust reverser doors: (Ref. AMM TASK 78-36-00-410-040)
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR

Subtask 78-31-41-440-060-A ** ON A/C NOT FOR ALL

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

Subtask 78-31-41-410-060-A ** ON A/C NOT FOR ALL

C. 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).

[Rev.10 from 2021] 2026.04.02 06:38:00 UTC