Detailed Visual Inspection of the Adaptor Ring Assembly [CFMB]

TASK 78-36-42-210-001-A
Detailed Visual Inspection of the Adaptor Ring Assembly

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)

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 27-80-00-866-005-A	Retracting the Slats on the Ground
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
TASK 78-36-42-400-001-A	Installation of the Adaptor Ring Assembly
ESM 710001
Adapter Ring Assembly
Adapter Ring Assembly
Adapter Ring Assembly

3. Job Set-up
Subtask 78-36-42-941-050-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 78-36-42-010-050-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 78-36-42-040-050-A ** ON A/C NOT FOR ALL

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

Subtask 78-36-42-866-050-A ** ON A/C NOT FOR ALL

D. Retract the slats (Ref. AMM TASK 27-80-00-866-005) and install a WARNING NOTICE(S).

Subtask 78-36-42-010-051-A ** ON A/C NOT FOR ALL

E. Open the thrust reverser doors to 45 degrees position (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 78-36-42-210-050-A ** ON A/C NOT FOR ALL

A. Do a visual inspection of the adaptor ring, inner and outer flanges, struts, lower stop fitting, upper outer and forward seal fittings, splice assembly, and hold open rod as follows:

INSPECT/CHECK	MAXIMUM SERVICEABLE LIMITS	REMARKS
1.Inspect the adaptor ring and the related hardware for:
A.Damage	No damage permitted	If you find some damage, replace the defective part (Ref. AMM TASK 78-36-42-000-001) and (Ref. AMM TASK 78-36-42-400-001)
2.Inspect the outer flange for:
A.Crack	No crack permitted	If there is a crack, replace the outer flange (Ref. AMM TASK 78-36-42-000-001) and (Ref. AMM TASK 78-36-42-400-001)
B.Fretting	The fretting must not be felt with a radius scribe (radius equal to 0.0314 in. (0.80 mm))	If the fretting is not in the seviceable limits, replace the outer flange (Ref. AMM TASK 78-36-42-000-001) and (Ref. AMM TASK 78-36-42-400-001) NOTE: Repair the damaged outer flange(s) in a shop environment ESM 710001.
3.Inspect the inner flange for:
A.Crack	2 in. (50.8 mm) maximum length, 1 in. (25.4mm) minimum between two cracks, 12 in. (304.8 mm) maximum total length of cracks	If the crack is in the serviceable limits, stop drill crack 0.5 in. (12.7 mm) long and over. If the crack is not in the serviceable limits, replace the inner flange (Ref. AMM TASK 78-36-42-000-001) and (Ref. AMM TASK 78-36-42-400-001)
B.Fretting	The fretting must not be felt with a radius scribe (radius equal to 0.0314 in. (0.8 mm))	If the fretting is not in the serviceable limits, replace the inner flange (Ref. AMM TASK 78-36-42-000-001) and (Ref. AMM TASK 78-36-42-400-001)
4.Inspect the struts for:
A.Crack	0.5 in. (12.7 mm) maximum length, 3 in. (76.2 mm) minimum between two cracks, 4.17 in. (105.92 mm) maximum total length of cracks	If the crack is not in the serviceable limits, replace the struts (Ref. AMM TASK 78-36-42-000-001) and (Ref. AMM TASK 78-36-42-400-001)
5.Inspect the lower stop fitting for:
A.Crack	No crack permitted	If there is crack, replace the lower stop fitting (Ref. AMM TASK 78-36-42-000-001) and (Ref. AMM TASK 78-36-42-400-001)
B.Fretting	Maximum depth 0.039 in. (0.99 mm)	If the fretting is not in the serviceable limits, replace the lower stop fitting (Ref. AMM TASK 78-36-42-000-001) and (Ref. AMM TASK 78-36-42-400-001)
6.Inspect the upper outer and forward seal fitting for:
A.Crack	No crack permitted	It there is a crack, replace the seal fitting (Ref. AMM TASK 78-36-42-000-001) and (Ref. AMM TASK 78-36-42-400-001)
7.Inspect the splice assembly for:
A.Crack	No crack permitted	If there is a crack, replace the splice (Ref. AMM TASK 78-36-42-000-001) and (Ref. AMM TASK 78-36-42-400-001)
8.Inspect the hold-open rod support for:
A.Crack, bend, wear	No crack, bend nor wear permitted	If there is a crack and/or bend and/or wear, replace the hold-open rod support (Ref. AMM TASK 78-36-42-000-001) and (Ref. AMM TASK 78-36-42-400-001).
9.Inspect the hold-open rod for:
A.Crack	No crack permitted	If there is a crack, replace the hold-open rod (Ref. AMM TASK 78-36-42-000-001) and (Ref. AMM TASK 78-36-42-400-001)
B.Fretting	Maximum depth 0.039 in. (0.99 mm)	If the fretting is not in the serviceable limits, replace the hold-open rod (Ref. AMM TASK 78-36-42-000-001) and (Ref. AMM TASK 78-36-42-400-001)
10.Inspect the hold-open quick release rod pins for:
A.Distorted or broken pin	No defects permitted	Replace if defective If there is swag, replace the hold-open rod (Ref. AMM TASK 78-36-42-000-001) and (Ref. AMM TASK 78-36-42-400-001)

5. Close-up
Subtask 78-36-42-410-050-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
(3) Remove the access platform(s).

Subtask 78-36-42-440-050-A ** ON A/C NOT FOR ALL

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

Subtask 78-36-42-410-051-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 WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 03:26:42 UTC