Detailed Visual Inspection of the Blocker Door [CFMB]

TASK 78-32-41-210-002-A
Detailed Visual Inspection of the Blocker Door

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

1. Reason for the Job

NOTE: This task can contribute to fuel savings.

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. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CP2517)	aerodynamic tape

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-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 78-32-41-000-001-A	Removal of the Lower Blocker Door
TASK 78-32-41-000-002-A	Removal of the Upper Blocker Door
TASK 78-32-41-000-003-A	Removal of the Latch Fitting and Latch Back Plate
TASK 78-32-41-000-004-A	Removal of the Kicker Plate from the Blocker Door
TASK 78-32-41-080-001-A	Removal of the Safety Sleeve from Blocker Door Actuator
TASK 78-32-41-200-041-A	Inspection/Check of the Latch Fitting Pin and Roller
TASK 78-32-41-400-001-A	Installation of the Lower Blocker Door
TASK 78-32-41-400-002-A	Installation of the Upper Blocker Door
TASK 78-32-41-400-003-A	Installation of the Latch Fitting and Latch Back Plate
TASK 78-32-41-400-004-A	Installation of the Kicker Plate from the Blocker Door
TASK 78-32-41-480-001-A	Installation of the Safety Sleeve on Blocker Door Actuator
TASK 78-32-41-820-001-A	Alignment of the Blocker Door
TASK 78-32-41-860-001-A	Manual Deployment of the Blocker Door
TASK 78-32-41-860-002-A	Manual Stowing of the Blocker Door
Permissible Wear - Blocker Door

3. Job Set-up
Subtask 78-32-41-941-052-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 78-32-41-010-051-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 78-32-41-040-052-A ** ON A/C NOT FOR ALL

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

Subtask 78-32-41-010-052-A ** ON A/C NOT FOR ALL

D. Deploy the blocker door manually (Ref. AMM TASK 78-32-41-860-001).

Subtask 78-32-41-480-051-A ** ON A/C NOT FOR ALL

E. Install the HIX3005 SAFETY SLEEVE - PIVOTING DOOR ACTUATOR on the blocker door (Ref. AMM TASK 78-32-41-480-001).

4. Procedure
Subtask 78-32-41-210-050-A ** ON A/C NOT FOR ALL

A. Do a visual inspection of the blocker door as follows:

INSPECT/CHECK	MAXIMUM SERVICEABLE LIMITS	REMARKS
1.Examine the blocker door for:
A.Delamination	1.5 in. (38.1 mm) maximum length.	Monitor at 750 Flight Hours / 750 Flight Cycles / 4 calendar months (whichever the earliest)
	7.4 in. (188 mm) minimum distance from other delaminations, holes or cracks.	It is recommended that all delaminations be repaired no later than 7500 Flight Hours / 5000 Flight Cycles / 24 calendar months (whichever the earliest)
	Five delaminations maximum per blocker door.	If the delaminations are not in the serviceable limits, replace the blocker door. (Ref. AMM TASK 78-32-41-000-001) or (Ref. AMM TASK 78-32-41-000-002) and (Ref. AMM TASK 78-32-41-400-001) or (Ref. AMM TASK 78-32-41-400-002).
B.Abrasion	No carbon fiber damage permitted.	Monitor at 750 Flight Hours / 750 Flight Cycles / 4 calendar months (whichever the earliest)
		Seal surface damage (Paint and surface resin only) with aerodynamic tape (Material No.CP2517) .
		Replace tape if peeled.
		If there is carbon fiber damage, replace the blocker door. (Ref. AMM TASK 78-32-41-000-001) or (Ref. AMM TASK 78-32-41-000-002) and (Ref. AMM TASK 78-32-41-400-001) or (Ref. AMM TASK 78-32-41-400-002).
C.Crack	1.0 in. (25.4 mm) maximum length in any direction.	Monitor at 750 Flight Hours / 750 Flight Cycles / 4 calendar months (whichever the earliest)
	7.4 in. (188 mm) minimum distance from other cracks, holes or delaminations.	Seal damaged area from entrance of moisture with aerodynamic tape (Material No.CP2517) .
	Five cracks maximum per blocker door.	If the crack is not in the serviceable limits, replace the blocker door. (Ref. AMM TASK 78-32-41-000-001) or (Ref. AMM TASK 78-32-41-000-002) and (Ref. AMM TASK 78-32-41-400-001) or (Ref. AMM TASK 78-32-41-400-002).
D.Gouge	0.008 in. (0.2 mm) maximum depth over a 8.0 in. (203.2 mm) length	Monitor at 750 Flight Hours / 750 Flight Cycles / 4 calendar months (whichever the earliest)
		Seal damaged area from entrance of moisture with aerodynamic tape (Material No.CP2517) .
		Replace tape if peeled or damaged.
		If gouge is not in the serviceable limits, replace the blocker door. (Ref. AMM TASK 78-32-41-000-001) or (Ref. AMM TASK 78-32-41-000-002) and (Ref. AMM TASK 78-32-41-400-001) or (Ref. AMM TASK 78-32-41-400-002).
E.Hole	1.0 in. (25.4 mm) maximum diameter.	Monitor at 750 Flight Hours / 750 Flight Cycles / 4 calendar months (whichever the earliest)
	7.4 in. (188 mm) minimum distance from other holes, cracks or delaminations.	Seal damaged area from entrance of moisture with aerodynamic tape (Material No.CP2517) .
	Five holes maximum per blocker door.	If the hole is not in the serviceable limits, replace the blocker door. (Ref. AMM TASK 78-32-41-000-001) or (Ref. AMM TASK 78-32-41-000-002) and (Ref. AMM TASK 78-32-41-400-001) or (Ref. AMM TASK 78-32-41-400-002).
F.Nick, scratch	0.008 in. (0.2 mm) maximum depth over a 8.0 in. (203.2 mm) length.	Monitor at 750 Flight Hours / 750 Flight Cycles / 4 calendar months (whichever the earliest) Seal damaged area from entrance of moisture with aerodynamic tape (Material No.CP2517) .
		Replace tape if peeled or damaged.
		If the nick or scratch is not in the serviceable limits, replace the blocker door. (Ref. AMM TASK 78-32-41-000-001) or (Ref. AMM TASK 78-32-41-000-002) and (Ref. AMM TASK 78-32-41-400-001) or (Ref. AMM TASK 78-32-41-400-001).
2.Examine the kicker plate for:
A.Damage	No damage permitted.	If there is damage, replace the kicker plate. (Ref. AMM TASK 78-32-41-000-004) and (Ref. AMM TASK 78-32-41-400-004).
3.Inspect the latch fitting and the roller for:
A.Damage	No damage permitted.	If there is damage, replace the latch fitting. (Ref. AMM TASK 78-32-41-000-003) and (Ref. AMM TASK 78-32-41-400-003).
B.Crack	No crack permitted.	If there is a crack, replace the latch fitting. (Ref. AMM TASK 78-32-41-000-003) and (Ref. AMM TASK 78-32-41-400-003).
C.Jamming	The roller must be free to turn.	If the roller is not free to turn inspect it, (Ref. AMM TASK 78-32-41-200-041) and reinstall it. (Ref. AMM TASK 78-32-41-400-003).
4.Examine the pivot access door for:
A.Damage	No damage permitted.	If you find some damage or missing, replace the defective part. (Ref. AMM TASK 78-32-41-000-001) or (Ref. AMM TASK 78-32-41-000-002) and (Ref. AMM TASK 78-32-41-400-001) or (Ref. AMM TASK 78-32-41-400-002).
5.Examine the access door for:
A.Damage	No damage permitted.	If you find some damage or missing, replace the defective part. (Ref. AMM TASK 78-32-41-000-001) or (Ref. AMM TASK 78-32-41-000-002) and (Ref. AMM TASK 78-32-41-400-001) or (Ref. AMM TASK 78-32-41-400-002).

5. Close-up
Subtask 78-32-41-080-051-A ** ON A/C NOT FOR ALL

A. Remove the HIX3005 SAFETY SLEEVE - PIVOTING DOOR ACTUATOR from the blocker door actuator without making thrust reverser operational (Ref. AMM TASK 78-32-41-080-001).

Subtask 78-32-41-410-052-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) Stow the blocker door:

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

(3) Move the blocker door to the stow position manually (Ref. AMM TASK 78-32-41-860-002).

Subtask 78-32-41-820-051-A ** ON A/C NOT FOR ALL

C. Make sure of the alignment of the blocker door (Ref. AMM TASK 78-32-41-820-001).

Subtask 78-32-41-440-052-A ** ON A/C NOT FOR ALL

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

Subtask 78-32-41-410-053-A ** ON A/C NOT FOR ALL

E. 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] 2026.04.01 03:26:09 UTC