Replacement of the Riveted Self-Locking Nuts for the Attachment of the Forward and/or the Mid Acoustical Panels [CFMB]

TASK 72-23-00-300-045-A
Replacement of the Riveted Self-Locking Nuts for the Attachment of the Forward and/or the Mid Acoustical Panels

ZONE: 400
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	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
400	POWER PLANT, NACELLES AND PYLONS

C. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
70	SELF-LOCKING NUTS	AIPC 72-23-00-25-020
80	SELF-LOCKING NUTS	AIPC 72-23-00-25-040
90	SELF-LOCKING NUTS	AIPC 72-23-00-25-060

D. Referenced Information

REFERENCE	DESIGNATION
TASK 72-21-00-000-005-A	Removal of the Spinner Front Cone
TASK 72-21-00-000-006-A	Removal of the Spinner Rear Cone
TASK 72-21-00-000-007-A	Removal of the Fan Rotor Blades
TASK 72-21-00-400-005-A	Installation of the Spinner Front Cone
TASK 72-21-00-400-006-A	Installation of the Spinner Rear Cone
TASK 72-23-00-000-009-A	Removal of the Forward Acoustical Panels of the Fan
TASK 72-23-00-000-025-A	Removal of the Mid Acoustical Panels
TASK 72-23-00-400-009-A	Installation of the Forward Acoustical Panels of the Fan
TASK 72-23-00-400-025-A	Installation of the Mid Acoustical Panels
TASK 72-23-00-400-028-A	Installation of the Splitter Fairing
SPM 704311390003
SPM 704331390005
SPM 704450320006
Replacement of the Self-Locking Nuts
Dimensional Information for the Replacement of the Self-Locking Nuts

3. Job Set-up
Subtask 72-23-00-941-099-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 72-23-00-010-125-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Put an access platform in position.
(2) Remove the spinner front cone (Ref. AMM TASK 72-21-00-000-005).
(3) Remove the spinner rear cone (Ref. AMM TASK 72-21-00-000-006).
(4) Remove a sufficient number of fan blades to get access to the repair area (Ref. AMM TASK 72-21-00-000-007).
(5) If necessary, remove the forward acoustical panels (Ref. AMM TASK 72-23-00-000-009) and/or the mid acoustical panels (Ref. AMM TASK 72-23-00-000-025).

NOTE: The acoustical panels must be removed only if they are concerned by the repair area.

4. Procedure
Subtask 72-23-00-350-062-A ** ON A/C NOT FOR ALL

A. Replacement of the Riveted Self-Locking Nuts

Dimensional Information for the Replacement of the Self-Locking Nuts ** ON A/C NOT FOR ALL

NOTE: If necessary, for the repair size rivets, drill at the same time the rivet holes in the new nut you install and the rivet holes on the containment case SPM 704311390003 or SPM 704331390005.

(1) Remove the rivet head with a 0.094 in. (2,4 mm) diameter drill SPM 704450320006.
(2) If you cannot remove the rivet head, use a 0.125 in. (3,2 mm) diameter drill related to the repair size rivet SPM 704331390005 or SPM 704450320006.
(3) Do a check of the rivet holes SPM 704331390005.
(4) Install the new AIPC 72-23-00-25-020 SELF-LOCKING NUTS (70) or AIPC 72-23-00-25-040 SELF-LOCKING NUTS (80) or AIPC 72-23-00-25-060 SELF-LOCKING NUTS (90) on the containment case with new rivets (10) or (20) or (30) or (40) or (50) or (60) SPM 704331390005.

5. Close-up
Subtask 72-23-00-410-117-A ** ON A/C NOT FOR ALL

A. Close Access
(1) If necessary, install the forward acoustical panels (Ref. AMM TASK 72-23-00-400-009) and/or the mid acoustical panels (Ref. AMM TASK 72-23-00-400-025).
(2) Install the fan blades (Ref. AMM TASK 72-23-00-400-028).
(3) Install the spinner rear cone (Ref. AMM TASK 72-21-00-400-006).
(4) Install the spinner front cone (Ref. AMM TASK 72-21-00-400-005).
(5) Make sure that the work area is clean and clear of tools and other items.
(6) Remove the access platform(s).
(7) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 02:42:03 UTC