Installation of the APU Generator

TASK 24-23-51-400-001-A
Installation of the APU Generator

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

FIN: 8XS

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	Torque wrench: range to between 0.480 and 0.370 m.daN (42.48 and 32.74 lbf.in )
No specific	Torque wrench: range to between 0.47 and 0.43 m.daN (41.6 and 38.1 lbf.in )
No specific	Torque wrench: range to between 0.70 and 0.60 m.daN (61.95 and 53.10 lbf.in )
No specific	Torque wrench: range to between 2.5 and 2.3 m.daN (18.44 and 16.96 lbf.ft )
No specific	Torque wrench: range to between 3.3 and 2.6 m.daN (24.34 and 19.17 lbf.ft )
No specific	Torque wrench: range to between 3.25 and 2.95 m.daN (23.97 and 21.76 lbf.ft )
No specific	Torque wrench: range to between 4.4 and 3.9 m.daN (32.45 and 28.76 lbf.ft )
98D49207537001	1	CABLE-SAFETY, APU GENERATOR
FRDH141	1	ADAPTER-TORQUE

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.03ABA1)	Synthetic base Lubricating Oil-Turbine Engine - -
(Material No.03ABB1)	Synthetic base Lubricating Oil-Turbine Engine Low Temp. -
(Material No.04SAB2)	Varnish Polyurethane-- Marking Structure
(Material No.08BAA9)	Non Aqueous Cleaner-General - -
No specific	22swg (0.71 mm (0.028 in) dia) chromium nickel wire

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
315AL, 316AR

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
7	SEAL PLATE	AIPC 24-23-04-01-040
9	O-RING	AIPC 24-23-51-01-010
10	O-RING	AIPC 24-23-51-01-020
13	WASHER	AIPC 24-23-51-01-040
19	NUTS AND CAPTIVE WASHERS	AIPC 24-23-51-01-080
7	SEAL PLATE	AIPC 24-23-84-01-040

E. Referenced Information

REFERENCE	DESIGNATION
TASK 20-21-11-911-001-A	Tightening Torques for Standard Threaded Fasteners
TASK 29-00-00-864-001-A	Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action
TASK 49-00-00-860-005-A	APU Start by External Power
TASK 49-00-00-860-005-A-01	APU Start by Batteries
TASK 49-00-00-860-006-A	APU Shutdown by External Power
TASK 49-00-00-860-006-A-01	APU Shutdown by Batteries
TASK 49-00-00-860-008-A	APU Start by External Power
TASK 49-00-00-860-008-A-01	APU Start by Batteries
TASK 49-00-00-860-009-A	APU Shutdown by External Power (131-9(A))
TASK 49-00-00-860-009-A-01	APU Shutdown by Batteries (131-9(A))
TASK 49-90-00-600-004-A	Check Oil Level and Replenish (APS 3200)
TASK 49-90-00-600-007-A	Check Oil Level and Replenish (131-9(A))
TASK 52-41-00-010-001-A	Open the APU Doors for Access
TASK 52-41-00-410-001-A	Close the APU Doors after Access
APU Generator 8XS (type 5913667 or type BA03604)
APU Generator 8XS (type BA16501)

3. Job Set-up
Subtask 24-23-51-860-055-A

A. Aircraft Maintenance Configuration
(1) On the panel 25VU make sure that the APU MASTER SW pushbutton switch is off.
(2) Make sure that there is a warning notice in the cockpit to tell persons not to start the APU.
(3) Make sure that the hydraulic systems are depressurized
(Ref. AMM TASK 29-00-00-864-001).
(4) Make sure that the ground fire extinguishing equipment is available.
(5) Make sure that the access platform is in position below the APU compartment.
(6) Make sure that the APU access doors are open (Ref. AMM TASK 52-41-00-010-001).
(7) Put an 98D49207537001 CABLE-SAFETY, APU GENERATOR on the generator to get a safe condition when you install the generator.

4. Procedure
Subtask 24-23-51-420-054-B

A. Installation of the APU Generator (type 5913667 or type BA03604)

WARNING: DO NOT CAUSE DAMAGE TO THE THREADS OF THE SET SCREWS WHEN YOU REMOVE OR INSTALL THE GENERATOR. THE GENERATOR WEIGHS APPROXIMATELY 23kg (50.7lb).

(1) Examine the seal plate (7) and the seals (8) and (11), which are part of the seal plate (7).
(2) Replace the AIPC 24-23-04-01-040 SEAL PLATE (7) or AIPC 24-23-84-01-040 SEAL PLATE (7) if you find:

Breaks and/or scratches on the seal plate (7),
Cuts on the seals (8) and/or (11),
The height of the seals (8) and/or (11) above the seal plate (7) is less than 0.25 mm (0.0098 in.).

(a) Remove the countersunk screws (1) and the seal plate (7).
(b) Lubricate the seals (8) and (11) of the new seal plate (7) with a thin layer of Synthetic base Lubricating Oil-Turbine Engine - - (Material No.03ABA1) or Synthetic base Lubricating Oil-Turbine Engine Low Temp. - (Material No.03ABB1) .
(c) Put the seal plate (7) on the flange of the APU generator (4).

NOTE: Make sure that the dowel pin (3) engages correctly with the pilot hole (2).

(d) Lubricate the countersunk screws (1) with Synthetic base Lubricating Oil-Turbine Engine - - (Material No.03ABA1) or Synthetic base Lubricating Oil-Turbine Engine Low Temp. - (Material No.03ABB1) .
(e) Install the countersunk screws (1) and TORQUE to between 0.47 and 0.43 m.daN (41.6 and 38.1 lbf.in )

.
(3) Lubricate the new AIPC 24-23-51-01-020 O-RING (10) and the new AIPC 24-23-51-01-010 O-RING (9) with a thin layer of Synthetic base Lubricating Oil-Turbine Engine - - (Material No.03ABA1) or Synthetic base Lubricating Oil-Turbine Engine Low Temp. - (Material No.03ABB1) .
(4) Install the O-ring (10) on the generator splined drive-shaft (6).
(5) Install the O-ring (9) on the generator mount flange (5).
(6) Install the generator (4) in its position and turn it clockwise to engage the slots.
(7) Make sure that the dowel pin (3) fully engages in the mounting flange of the accessory drive gearbox.
(8) TORQUE the nuts (15)

P/N NAS1291C6M to between 3.3 and 2.6 m.daN (24.34 and 19.17 lbf.ft )
P/N MS21043-6 to between 4.4 and 3.9 m.daN (32.45 and 28.76 lbf.ft ) .

(9) Tighten the nuts (15) behind the generator terminal with the FRDH141 ADAPTER-TORQUE (Ref. AMM TASK 20-21-11-911-001).
(10) Clean the nuts (15) with Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(11) Make a mark on the nuts (15) with Varnish Polyurethane-- Marking Structure (Material No.04SAB2) .
(12) Install the spacer (27), the clamp (26), the washer (25) and the screw (24).
(13) TORQUE the screw (24) to between 0.480 and 0.370 m.daN (42.48 and 32.74 lbf.in )

.
(14) Remove the CAP-BLANKING from each electrical connector and receptacle.
(15) Connect the electrical connector (12) to the APU generator (4).

NOTE: Make sure that you connect the electrical cable connections correctly to the APU generator terminal.

(16) Install the washers (23) and the terminal forks (22) on the APU generator (4).

CAUTION: MAKE SURE THAT THE WASHER IS INSTALLED BETWEEN THE PHASE LEADS AND THE TERMINAL BLOCK. IF NOT, THE TERMINAL BLOCK WILL BURN LOCALLY BECAUSE OF RESISTANCE HEATING.

(17) Connect the electrical cables (21) as follows:

Cable 8XS-T1 to generator terminal T1,
Cable 8XS-T2 to generator terminal T2,
Cable 8XS-T3 to generator terminal T3, and
Cable 8XS- N to generator terminal N.

(18) If necessary, install the new AIPC 24-23-51-01-080 NUTS AND CAPTIVE WASHERS (19).
(19) Install the washers (20) and the nuts and captive washers (19).
(20) TORQUE the nuts and captive washers (19) to between 2.5 and 2.3 m.daN (18.44 and 16.96 lbf.ft )

.
(21) Install the cover plate (18) with the washers (16) and the screws (17).
(22) TORQUE the screws (17) to between 0.47 and 0.43 m.daN (41.6 and 38.1 lbf.in )

.
(23) Installation of the drain plug (14):

NOTE: If you install a new APU generator (4), this step is not necessary.

(a) If you install the APU generator (4) removed from the aircraft:

Install the drain plug (14) with the new AIPC 24-23-51-01-040 WASHER (13).

NOTE: The drain plug (14) has no inscription in the head.

(b) TORQUE the drain plug (14) to between 3.25 and 2.95 m.daN (23.97 and 21.76 lbf.ft )

WARNING: USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.

Safety the drain plug (14) with 22swg (0.71 mm (0.028 in) dia) chromium nickel wire.

Subtask 24-23-51-420-056-B

B. Installation of the APU Generator (type BA16501)

WARNING: DO NOT CAUSE DAMAGE TO THE THREADS OF THE SET SCREWS WHEN YOU REMOVE OR INSTALL THE GENERATOR. THE GENERATOR WEIGHS APPROXIMATELY 23kg (50.7lb).

(1) Examine the seal plate (7) and the seals (8) and (11), which are part of the seal plate (7).
(2) Replace the AIPC 24-23-04-01-040 SEAL PLATE (7) if you find:

Breaks and/or scratches on the seal plate (7),
Cuts on the seals (8) and/or (11),
The height of the seals (8) and/or (11) above the seal plate (7) is less than 0.25 mm (0.0098 in.).

NOTE: Make sure that the dowel pin (3) engages correctly with the pilot hole (2).

.
(3) Lubricate the new AIPC 24-23-51-01-020 O-RING (10) and the new AIPC 24-23-51-01-010 O-RING (9) with a thin layer of Synthetic base Lubricating Oil-Turbine Engine - - (Material No.03ABA1) or Synthetic base Lubricating Oil-Turbine Engine Low Temp. - (Material No.03ABB1) .
(4) Install the O-ring (10) on the generator splined drive-shaft (6).
(5) Install the O-ring (9) on the generator mount flange (5).
(6) Install the APU generator (4) in its position and turn it clockwise to engage the slots.
(7) Make sure that the dowel pin (3) fully engages in the mounting flange of the accessory drive gearbox.
(8) TORQUE the nuts (15)

P/N NAS1291C6M to between 3.3 and 2.6 m.daN (24.34 and 19.17 lbf.ft )
P/N MS21043-6 to between 4.4 and 3.9 m.daN (32.45 and 28.76 lbf.ft ) .

(9) Tighten the nuts (15) behind the generator terminal with an FRDH141 ADAPTER-TORQUE (Ref. AMM TASK 20-21-11-911-001).
(10) Clean the nuts (15) with Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(11) Make a mark on the nuts (15) with Varnish Polyurethane-- Marking Structure (Material No.04SAB2) .
(12) Install the spacer (27), the clamp (26), the washer (25) and the screw (24).
(13) TORQUE the screw (24) to between 0.480 and 0.370 m.daN (42.48 and 32.74 lbf.in )

.
(14) Remove the CAP-BLANKING from each electrical connector and receptacle.
(15) Connect the electrical connector (12) to the APU generator (4).

NOTE: Make sure that you connect the electrical cable connections correctly to the APU generator terminal.

(16) Install the washers (23) and the terminal forks (22) on the APU generator (4).

CAUTION: MAKE SURE THAT THE WASHER IS INSTALLED BETWEEN THE PHASE LEADS AND THE TERMINAL BLOCK. IF NOT, THE TERMINAL BLOCK WILL BURN LOCALLY BECAUSE OF RESISTANCE HEATING.

(17) Connect the electrical cables (21) as follows:

Cable 8XS-T1 to generator terminal T1,
Cable 8XS-T2 to generator terminal T2,
Cable 8XS-T3 to generator terminal T3, and
Cable 8XS- N to generator terminal N.

(18) Install the new AIPC 24-23-51-01-080 NUTS AND CAPTIVE WASHERS (19).
(19) TORQUE the nuts and captive washers (19) to between 2.5 and 2.3 m.daN (18.44 and 16.96 lbf.ft )

.
(20) Install the cover plate (18) with the washers (16) and the screws (17).
(21) TORQUE the screws (17) to between 0.47 and 0.43 m.daN (41.59 and 38.05 lbf.in )

.
(22) Installation of the drain plug:

NOTE: If you install a new APU generator (4), this step is not necessary.

(a) If you install the APU generator (4) removed from the aircraft:

Install the drain plug (14) with the new AIPC 24-23-51-01-040 WASHER (13).

NOTE: The drain plug (14) has the inscription "OIL DRAIN" on the head.

(b) TORQUE the drain plug (14) to between 0.70 and 0.60 m.daN (61.95 and 53.10 lbf.in )

Subtask 24-23-51-210-062-A

C. Visual Check

CAUTION: USE ONLY APPROVED TYPES/BRANDS OF LUBRICANTS. DO NOT MIX TYPES//BRANDS OF LUBRICANTS.

(1) Do a visual check of the oil quantity on the APU oil level. Add oil if the oil level is on or less than the ADD mark on the sight glass

for APU GTCP 36-300
(Ref. AMM D/O 49-90-00-60)
for APU APS 3200
(Ref. AMM TASK 49-90-00-600-004)
for APU 131-9(A)
(Ref. AMM TASK 49-90-00-600-007)

Subtask 24-23-51-865-061-A

D. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
121VU	APU/APU/CTL	2KD	L42
121VU	APU/ECB/SPLY	1KD	L41

Subtask 24-23-51-710-055-A

E. Start and Operate the APU
(1) Start the APU

for APU GTCP 36-300
(Ref. AMM D/O 49-00-00-86)
for APU APS 3200
(Ref. AMM TASK 49-00-00-860-005)
for APU 131-9(A)
(Ref. AMM TASK 49-00-00-860-008)

(2) Allows the APU to run 15 minutes.
(3) Check at 95 % speed of the APU that the generator energizes and begins to indicate voltage and frequency (without the selection of electrical loads).
(4) An 'AVAIL' message on top of the APU page shows that you can select an electric/pneumatic load.
(5) Shutdown the APU

for APU GTCP 36-300
(Ref. AMM D/O 49-00-00-86)
for APU APS 3200
(Ref. AMM TASK 49-00-00-860-006)
for APU 131-9(A)
(Ref. AMM TASK 49-00-00-860-009)

(6) Open the APU access doors (Ref. AMM TASK 52-41-00-010-001).
(7) Do a leak check of the APU Oil System.

NOTE: No leaks are permitted.

5. Close-up
Subtask 24-23-51-410-057-A

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the APU access doors 315AL 316AR (Ref. AMM TASK 52-41-00-410-001).
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.03.31 23:22:31 UTC