Inspection of the Dedicated Alternator Drive Gear Assembly Retention Nut [IAE]

TASK 72-60-33-200-011-A
Inspection of the Dedicated Alternator Drive Gear Assembly Retention Nut

1. Reason for the Job
This task gives the procedure for the inspection of the engine dedicated alternator (EDA) drive gear retention nut for loosening.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 354 and 309 lbf.in (4.00 and 3.49 m.daN )
IAE1F10170	1	BASE,INSTALL REMOVE
IAE1F10218	1	REACTION,INSTALL REMOVE
IAE1P16486	1	ADAPTER,ANTI TORQUE

B. Work Zones and Access Panels

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

C. Referenced Information

REFERENCE	DESIGNATION
TASK 71-00-00-710-022-B	Test No. 6: Electronic Engine Control (EEC) System Idle Test
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)
TASK 72-60-33-000-010-B	Removal of the Dedicated Alternator Drive Gear Assembly
TASK 72-60-33-400-010-B	Installation of the Dedicated Alternator Drive Gear Assembly
Inspection of Dedicated Alternator Retention Nut

3. Job Set-up
Subtask 72-60-33-941-053-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 72-60-33-010-056-A ** ON A/C NOT FOR ALL

B. Open the fan cowls (Ref. AMM TASK 71-13-00-010-010):
(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR.
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR.

Subtask 72-60-33-020-059-A ** ON A/C NOT FOR ALL

C. Remove the engine dedicated alternator drive gear assembly (Ref. AMM TASK 72-60-33-000-010).

4. Procedure
Subtask 72-60-33-020-060-A ** ON A/C NOT FOR ALL

A. Check the torque of the engine dedicated alternator drive gear retention nut.

Inspection of Dedicated Alternator Retention Nut ** ON A/C NOT FOR ALL

(1) Install the tool (4) IAE1F10170 BASE,INSTALL REMOVE off on the swivel vice (5).
(2) Install the EDA drive gear assembly on the base (4) with EDA drive gear (6) to the top. Safety with the special screws (3).
(3) Install the tool (2) IAE1F10218 REACTION,INSTALL REMOVE or IAE1P16486 ADAPTER,ANTI TORQUE off on the EDA drive gear.
(4) Hold the EDA drive shaft and rotor with the reaction spanner (2).
(5) Make a mark to show the position of the nut (1) relative to the shaft with an approved marker.
(6) Loosen the nut (1) and torque again the nut (1) to the mark.
Read and record the torque value. Do not exceed 354 lbf.in (4.00 m.daN).
(a) If the torque is more than 300 lbf.in (3.39 m.daN), install again the EDA.
(b) If torque is between 75 lbf.in (0.85 m.daN) and 300 lbf.in (3.39 m.daN), remove the nut (1) and install a new Post SBE72-0070 standard nut. Torque the new nut (1) to between 354 and 309 lbf.in (4.00 and 3.49 m.daN )

.
(c) If torque is less than 75 lbf.in (0.85 m.daN), replace the EDA drive gear assembly.
(7) Remove the reaction spanner (2) from the EDA drive gear.
(8) Remove the special screws (3). Remove the EDA drive gear assembly from the base (4).

Subtask 72-60-33-420-058-A ** ON A/C NOT FOR ALL

B. Install the engine dedicated alternator (EDA) drive gear assembly (Ref. AMM TASK 72-60-33-400-010).

5. Close-up
Subtask 72-60-33-410-055-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 fan cowls (Ref. AMM TASK 71-13-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR.
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR.
(3) Remove the WARNING NOTICE(S).

Subtask 72-60-33-790-052-B ** ON A/C NOT FOR ALL

B. Do an electronic engine control (EEC) system idle test (Ref. AMM TASK 71-00-00-710-022).

[Rev.10 from 2021] 2026.04.01 02:47:04 UTC