Detailed Visual Inspection of the Engine Outer Flanges and the Thrust Reverser "J" Ring [CFMB]

TASK 78-36-42-210-002-A
Detailed Visual Inspection of the Engine Outer Flanges and the Thrust Reverser "J" Ring

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)
HIX3010-0	1	CHECK TOOL - J-RING
HIX3011-0	1	CHECK TOOL-OUTER FLANGE

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-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 78-36-00-010-040-B	Opening of the Thrust Reverser Doors
TASK 78-36-00-410-040-B	Closing of the Thrust Reverser Doors
TASK 78-36-42-000-001-A	Removal of the Adaptor Ring Assembly
ESM 710001
CMM 783236
Adapter Ring Outer Flange Locator
Location of "J" Ring
Check "V" Outer Flange of "J" Ring with Tool
Check "V" Shape of the Outer Flange with Tool

3. Job Set-up
Subtask 78-36-42-941-058-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 78-36-42-010-066-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 an ACCESS PLATFORM 1M(3 FT) in position.

Subtask 78-36-42-040-059-A ** ON A/C NOT FOR ALL

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

Subtask 78-36-42-010-067-A ** ON A/C NOT FOR ALL

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

4. Procedure
Subtask 78-36-42-860-053-A ** ON A/C NOT FOR ALL

A. Cleaning:

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

(1) Clean the mating surfaces with a cloth soaked with MIBK/MEK Blend.
(2) Dry all surfaces with a clean cloth before the solvent becomes gas.

Subtask 78-36-42-210-055-A ** ON A/C NOT FOR ALL

B. Do a visual inspection of the "J" Ring and outer flange as follows:

INSPECT/CHECK	MAXIMUM SERVICEABLE LIMITS	REMARKS
1.Inspect the "J" ring for:
A.Damage		If damage is less than the check tool length, refer to 4.C., "J" Ring Check. If damage is more than the check tool length, remove the Adaptor Ring Assembly (Ref. AMM TASK 78-36-42-000-001) and after in shop refer to CMM 783236, Repair n°52.
2.Inspect the outer flange for:
A.Damage		If damage is less than the check tool length, refer to 4.D., Outer Flange Check. If damage is more than the check tool length, remove the Adaptor Ring Assembly (Ref. AMM TASK 78-36-42-000-001) and after in shop refer to ESM 710001.

Subtask 78-36-42-220-052-A ** ON A/C NOT FOR ALL

C. "J" Ring" Check
(1) Damage less than the check tool length.

NOTE: Only the damages under check tool length can be checked with check tool. A "V" outer flange clear area is necessary at each extremity of the check tool.

(a) Check the "V" Blade.

Check "V" Outer Flange of "J" Ring with Tool ** ON A/C NOT FOR ALL

1 Place the "J" Ring Check Tool HIX3010-0 CHECK TOOL - J-RING onto the "V" Blade of the "J" Ring.
2 Check the gap between the tool and the forward face of the "V" blade using 0.010 in. (0.250 mm) thickness gauge. If it is greater than 0.010 in. (0.250 mm) replace the "J" Ring CMM 783236.
3 Check the gap between the tool and the rear face of the "V" blade using 0.005 in. (0.125 mm) thickness gauge. If it is greater than 0.005 in. (0.125 mm) replace the "J" Ring CMM 783236.

Subtask 78-36-42-220-053-A ** ON A/C NOT FOR ALL

D. Outer Flange Check
(1) Damage less than the check tool length.

NOTE: Only the damages under check tool length can be checked with check tool. A "V" groove clear area is necessary at each extremity of the check tool.

(a) Place the Outer Flange Check Tool HIX3011-0 CHECK TOOL-OUTER FLANGE into the "V" groove of the outer flange.

Check "V" Shape of the Outer Flange with Tool ** ON A/C NOT FOR ALL

1 Check the gap between the tool and the forward face of the "V" groove using 0.010 in. (0.250 mm) thickness gauge. If it is greater than 0.010 in. (0.250 mm), replace the adapter ring outer flange (Ref. AMM TASK 78-36-42-000-001).

NOTE: If more than three outer flanges are affected by half thrust reverser, replace the five outer flanges (Ref. AMM TASK 78-36-42-000-001).

2 Check the gap between the tool and the rear face of the "V" groove using 0.005 in. (0.125 mm) thickness gauge. If it is greater than 0.005 in. (0.125 mm) replace the adapter ring outer flange (Ref. AMM TASK 78-36-42-000-001), or repair the adapter ring outer flange ESM 710001.

NOTE: If more than three outer flanges are affected by half thrust reverser, replace the five outer flanges (Ref. AMM TASK 78-36-42-000-001).

5. Close-up
Subtask 78-36-42-410-062-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 cowl doors: (Ref. AMM TASK 78-36-00-410-040)
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR

Subtask 78-36-42-440-056-A ** ON A/C NOT FOR ALL

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

Subtask 78-36-42-410-063-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] 2026.04.01 03:26:43 UTC