Detailed Inspection of Actuator Rod End Attachments (Blocker Doors Deployed) [CFMB]

TASK 78-31-41-210-042-B
Detailed Inspection of Actuator Rod End Attachments (Blocker Doors Deployed)

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.

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

ZONE: 400
FIN: 1000EM1 ** ON A/C NOT FOR ALL
FIN: 1000EM2 ** ON A/C NOT FOR ALL

1. Reason for the Job
Refer to the MPD TASK: 783100-C5
DETAILED INSPECTION OF ACTUATOR ROD END ATTACHMENTS (BLOCKER DOORS DEPLOYED)
This task is available only for A/C equipped with actuator fitting assembly P/N 321-322-900-0, P/N 321-322-900-6 or P/N 321-360-801-0 which contains fitting P/N 321-313-500-6 or P/N 321-360-901-6. For further information, please refer to Airbus SB 78-1032/VSBRA32078-127.

NOTE: P/N 321-322-900-0, P/N 321-322-900-6 or P/N 321-360-801-0 are P/N of the fitting assembly itself. P/N 321-313-500-6 or P/N 321-360-901-6 are P/N of the fitting.

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

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 1M(3 FT)
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
400	POWER PLANT, NACELLES AND PYLONS
FOR [1000EM1] (ENGINE-1)
437AL, 438AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR

C. 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	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 78-31-41-000-001-A	Removal of the Blocker Door Hydraulic Actuator
TASK 78-31-41-000-803-A	Removal of the Blocker Door Hydraulic Actuator Clevis
TASK 78-31-41-400-001-A	Installation of the Blocker Door Hydraulic Actuator
TASK 78-31-41-400-803-A	Installation of the Blocker Door Hydraulic Actuator Clevis
TASK 78-32-41-860-002-A	Manual Stowing of the Blocker Door
SRM 512100
SRM 517400
NSRM 540101
AIPC 78-31-41-02
Hydraulic Actuator Clevis
Hold-Open Rod, Blocker Door (HIX3002)

3. Job Set-up
Subtask 78-31-41-941-054-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) On the center pedestal, on ENG panel 115VU:
(a) Put a WARNING NOTICE(S) to tell persons not to start the engine.
(2) Make sure that engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) On 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 78-31-41-010-055-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 78-31-41-040-053-A ** ON A/C NOT FOR ALL

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

4. Procedure
Subtask 78-31-41-010-081-A ** ON A/C NOT FOR ALL

A. Removal for Access
(1) Remove the blocker door hydraulic actuator clevis for access (Ref. AMM TASK 78-31-41-000-803).

Subtask 78-31-41-210-051-A ** ON A/C NOT FOR ALL

B. Do an inspection of the clevis and the related hardware as follows:

INSPECT/CHECK	MAXIMUM SERVICEABLE LIMITS	REMARKS
1.Examine the clevis and the related hardware for:
A.Damage (Base and Radius only)	No damage permitted	If you find damage, replace the defective part (Ref. AMM TASK 78-31-41-000-803) and (Ref. AMM TASK 78-31-41-400-803).
B.Missing	None permitted	If parts are missing, replace them (Ref. AMM TASK 78-31-41-000-803) and (Ref. AMM TASK 78-31-41-400-803).
C.Corrosion the clevis	0.060 in. (1.52 mm) deep ( 0.256 in. (6.50 mm) remaining lug thickness)	Inspect the clevis lugs for corrosion damage. If the actuator clevis lug is corroded, remove the corrosion SRM 517400. Apply chemical conversion coating plus paint to all blended areas per SRM 512100.
D.Corrosion found within the clevis bore area.	No corrosion permitted	If corrosion is found within the bore area, either replace with the new clevis (Ref. AMM TASK 78-31-41-000-803) and (Ref. AMM TASK 78-31-41-400-803), or contact UTC Aerospace Systems, Service Bulletin No. RA32078-127.
E.Bolts protrusion through the locking feature of the nut	Bolt must protrude a minimum of 1.5 threads through nut.	Replace the bolt with the bolt of the correct length AIPC 78-31-41-02 .
F.Surface damage including but not limited to nick, scratch, gouge, chafe, wear, abrasion;(Tangs only).	0.315 in. (8.00 mm) minimum remaining thickness	Determine the surface cleanup NSRM 540101.
2.Examine the blocker door actuator rod for:
A.Scratch	No scratch permitted	If there is a scratch, replace the actuator (Ref. AMM TASK 78-31-41-000-001) and (Ref. AMM TASK 78-31-41-400-001).

Subtask 78-31-41-420-061-A ** ON A/C NOT FOR ALL

C. Installation of the Blocker Door Hydraulic Actuator Clevis
(1) Install the blocker door hydraulic actuator clevis (Ref. AMM TASK 78-31-41-400-803).

5. Close-up
Subtask 78-31-41-860-054-A ** ON A/C NOT FOR ALL

A. Close the blocker doors.

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

(1) Move the blocker doors to the closed position manually (Ref. AMM TASK 78-32-41-860-002).

Subtask 78-31-41-440-053-A ** ON A/C NOT FOR ALL

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

Subtask 78-31-41-410-056-A ** ON A/C NOT FOR ALL

C. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) 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.
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).

Subtask 78-31-41-710-053-A ** ON A/C NOT FOR ALL

D. 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 03:24:26 UTC