Replace a Captive Nut on the Attach Ring - VRS2934 [IAE]

TASK 71-11-11-300-011-A
Replace a Captive Nut on the Attach Ring - VRS2934

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

1. Reason for the Job
This task gives the procedure for the replacement of a captive nut on the attach ring.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 2M (6 FT)
No specific	AR	DRILL - ELECTRIC OR PNEUMATIC
No specific	AR	GUN - RIVET
No specific	1	HAMMER - FIBER
No specific	AR	PUNCH - PIN
No specific	AR	WARNING NOTICE(S)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.V01-002)	cleaning fluid
(Material No.V04-005)	jointing compound
(Material No.V06-131)	marking pen
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
437AL, 438AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
2	RIVET	AIPC 71-11-11-80-060
1	CAPTIVE NUT	AIPC 71-11-11-80-080
4	RIVET	AIPC 71-11-11-80-090
3	CAPTIVE NUT	AIPC 71-11-11-80-110

E. Referenced Information

REFERENCE	DESIGNATION
TASK 71-11-11-200-010-B	Interface Inspection of the Air Intake Cowl
TASK 71-13-00-010-010-A	Opening of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 71-13-00-410-010-A	Closing of the Fan Cowls 437AL(447AL),438AR(448AR)
Replacement of the Captive Nut on the Attach Ring

3. Job Set-up
Subtask 71-11-11-941-057-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 71-11-11-010-056-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Open the fan cowls (Ref. AMM TASK 71-13-00-010-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR.
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR.
(2) Put the ACCESS PLATFORM 2M (6 FT) in position.

4. Procedure
Subtask 71-11-11-350-053-A ** ON A/C NOT FOR ALL

A. Remove the damaged captive nut from the attach ring.

Replacement of the Captive Nut on the Attach Ring ** ON A/C NOT FOR ALL

(1) Use the applicable DRILL - ELECTRIC OR PNEUMATIC to remove the heads of the rivets (2) or (4) that attach the captive nut.
(2) Use the PUNCH - PIN and the HAMMER - FIBER to remove the two rivets from the captive nut.
(3) Do again steps (1) and (2) to remove the remaining damaged captive nut(s).
(4) Discard the captive nut(s) (1) or (3).

Subtask 71-11-11-110-053-A ** ON A/C NOT FOR ALL

B. Clean the repair area.
(1) Use a Textile-Lint free Cotton - (Material No.14SBA1) made moist with cleaning fluid (Material No.V01-002) to clean the interfaces of the replacement captive nut and the attach ring.
(2) Use a Textile-Lint free Cotton - (Material No.14SBA1) to dry the area before the cleaning fluid dries.
(3) Make sure there is no unwanted material on the interfaces of the parts.

Subtask 71-11-11-210-057-B ** ON A/C NOT FOR ALL

C. Examine the attach ring on the air intake cowl (Ref. AMM TASK 71-11-11-200-010).
Make sure the attach ring is in a serviceable condition.

Subtask 71-11-11-350-054-A ** ON A/C NOT FOR ALL

D. Install the replacement AIPC 71-11-11-80-110 CAPTIVE NUT (3) or AIPC 71-11-11-80-080 CAPTIVE NUT (1).

Replacement of the Captive Nut on the Attach Ring ** ON A/C NOT FOR ALL

(1) Apply a thin layer of the jointing compound (Material No.V04-005) on to the AIPC 71-11-11-80-060 RIVET (2) or AIPC 71-11-11-80-090 RIVET (4).
(2) Align the holes in the captive nut with the holes in the attach ring.
(3) Install a rivet through each hole of the captive nut and the attach ring.
(4) Use the GUN - RIVET to tighten each rivet.

NOTE: The installation procedure is the same for the two types of captive nuts.

Subtask 71-11-11-110-054-A ** ON A/C NOT FOR ALL

E. Clean the area around the replacement captive nut.
(1) Use a Textile-Lint free Cotton - (Material No.14SBA1) made moist with cleaning fluid (Material No.V01-002) to clean the captive nut and the repair area of the attach ring.
(2) Use a Textile-Lint free Cotton - (Material No.14SBA1) to dry the area before the cleaning fluid dries.
(3) Make sure there is no unwanted material on the parts.

Subtask 71-11-11-210-058-A ** ON A/C NOT FOR ALL

F. Examine the repaired attach ring to make sure that the repair is satisfactory and that it agrees with the repair instructions.

Subtask 71-11-11-350-055-A ** ON A/C NOT FOR ALL

G. Write the repair scheme number VRS2934 on the identification plate of the cowl, adjacent to the part number. Use a marking pen (Material No.V06-131) of a different colour than the background.

5. Close-up
Subtask 71-11-11-410-054-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Close the fan cowls (Ref. AMM TASK 71-13-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR.
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR.
(2) Remove the WARNING NOTICE(S).
(3) Remove the access platform(s).

[Rev.10 from 2021] 2026.04.01 02:28:55 UTC