Unload the Power Plant [IAE]

TASK 71-00-20-000-802-A
Unload the Power Plant

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE PARTS AFTER THE ENGINE SHUTDOWN. USE APPLICABLE THERMAL GLOVES. THE ENGINE PARTS CAN STAY HOT FOR ONE HOUR AFTER SHUTDOWN AND CAN BURN YOU.

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

WARNING: MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING GEAR. THIS WILL PREVENT UNWANTED MOVEMENT OF THE LANDING GEAR, AND THUS POSSIBLE INJURY TO PERSONS AND DAMAGE TO THE AIRCRAFT AND/OR EQUIPMENT.

WARNING: PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START A TASK ON OR NEAR:

THE FLIGHT CONTROLS
THE FLIGHT CONTROL SURFACES
THE LANDING GEAR AND THE RELATED DOORS
COMPONENTS THAT MOVE.

MOVEMENT OF COMPONENTS CAN KILL OR CAUSE INJURY TO PERSONS AND/OR CAN CAUSE DAMAGE TO THE EQUIPMENT.

WARNING: MAKE SURE THAT ALL THE CIRCUITS IN MAINTENANCE ARE ISOLATED BEFORE YOU SUPPLY ELECTRICAL POWER TO THE AIRCRAFT. UNWANTED ELECTRICAL POWER CAN BE DANGEROUS.

ZONE: 400

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

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 1M(3 FT)
No specific	AR	WARNING NOTICE(S)
98D71203501001	1	BOOTSTRAP SYSTEM
ALT71000001	1	ELECTRICAL HOIST KIT
AM2228-A1	1	ENGINE CRADLE
AM2228-B1	1	BASE
S1787CR	1	ENGINE CRADLE
S487ETT2	1	ENGINE TROLLEY
S889BH0	1	BRACE - HOLD OPEN COWLS
TMHBS13-00-00	1	BRACE-HOLD OPEN COWLS
TMHEC29-00-00	1	CRADLE,V2500 ENGINE
TMHET06-00-00	1	TRAILER,ENGINE GROUND HANDLING

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
400	POWER PLANT, NACELLES AND PYLONS
FOR [1000EM1] (ENGINE-1)
437AL, 438AR, 451AL, 452AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR, 461AL, 462AR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 05-57-00-200-001-B	Aircraft Stability
TASK 30-21-49-000-011-B	Removal of the Anti-ice Duct No. 2
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 71-71-42-000-010-A	Removal of the Drains Mast
TASK 78-30-00-040-012-A	Deactivation of the Thrust Reverser Hydraulic Control Unit (HCU) for Ground Maintenance
TASK 78-32-00-010-010-A	Opening of the Thrust Reverser Halves
TASK 78-32-00-410-010-A	Closing of the Thrust Reverser Halves
Hydraulic Control Unit
Fan Cowl and Thrust Reverser Braces
Bootstrap Installation
Bootstrap Installation Manual Hoist Kit
Bootstrap Installation Electrical Hoist Kit
Engine Handling Points

3. Job Set-up
Subtask 71-00-20-941-057-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) Make sure that the A/C is stable (Ref. AMM TASK 05-57-00-200-001).
(2) On the center pedestal, on ENG panel 115VU:
(a) Put a WARNING NOTICE(S) to tell persons not to start the engine.
(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) in position to tell persons not to energize the FADEC 1(2).
(4) On panel 30VU:
(a) Make sure that the APU BLEED pushbutton switch is released (ON legend off).
(b) Put a WARNING NOTICE(S) in position to tell the persons not to press the APU BLEED pushbutton switch.
(5) Put a WARNING NOTICE(S) in position on the HP ground connector to tell persons not to pressurize the pneumatic system.

Subtask 71-00-20-865-065-A ** ON A/C NOT FOR ALL

WARNING: BEFORE YOU OPEN PHC CIRCUIT BREAKERS 2DA1(2,3), OPEN PROBE HEATER CIRCUIT-BREAKERS 1DA1(2), 3DA1(2,3), 4DA1(2,3) AND 5DA1(2,3). IF YOU DO NOT OBEY THIS SEQUENCE: - THE PROBES WILL BECOME TOO HOT. - THIS CAN CAUSE DAMAGE TO EQUIPMENT AND INJURY TO MAINTENANCE PERSONNEL.

WARNING: MAKE SURE THAT YOU OPEN THE CIRCUIT BREAKERS AS FOLLOWS:

1JH, 2JH1 AND 3JH1 BEFORE 2KS1
1JH, 2JH2 AND 3JH2 BEFORE 2KS2.

IF YOU DO NOT OBEY THIS SEQUENCE, THERE IS A RISK OF ELECTROCUTION. THIS IS BECAUSE YOU WILL START CONTINUOUS IGNITION IF YOU OPEN CIRCUIT BREAKER 2KS1 OR 2KS2 FIRST.

B. Open, safety and tag these circuit breakers in this sequence:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	ANTI ICE/PROBES/PHC/1	2DA1	D03
122VU	ANTI ICE/PROBES/2/TAT	1DA2	Y15
122VU	ANTI ICE/PROBES/PHC/2	2DA2	Y12
122VU	ANTI ICE/PROBES/1/TAT	1DA1	Z12
122VU	ANTI ICE/PROBES/PHC/3	2DA3	Y16
49VU	ANTI ICE/PROBES/PITOT/1	3DA1	D02
122VU	ANTI ICE/PROBES/2/PITOT	3DA2	Y14
122VU	ANTI ICE/PROBES/3/PITOT	3DA3	Z16
49VU	ANTI ICE/PROBES/AOA/1	4DA1	D04
122VU	ANTI ICE/PROBES/2/AOA	4DA2	Y13
122VU	ANTI ICE/PROBES/3/AOA	4DA3	Z15
122VU	ANTI ICE/PROBES/1/STATIC	5DA1	Z13
122VU	ANTI ICE/PROBES/2/STATIC	5DA2	Y11
122VU	ANTI ICE/PROBES/3/STATIC	5DA3	Z14
49VU	ANTI ICE/RAIN/RPLNT/CAPT	1DB1	D01
122VU	ANTI ICE/RAIN/RPLNT/F/O	1DB2	W11
122VU	ANTI ICE/WINDOWS/L	4DG1	X14
122VU	ANTI ICE/WINDOWS/R	4DG2	W14
123VU	ANTI ICE/L/WHSLD	1DG1	AF10
123VU	ANTI ICE/R/WHSLD	1DG2	AF03
49VU	ENGINE/1 AND 2/IGN/SYS A	1JH	A03
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/A	1WE1	Q43
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/B	2WE1	Q44
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/A	1WE2	Q41
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/B	2WE2	Q42
121VU	RCDR/DFDR	7TU	K16
49VU	COM/CVR/SPLY	23RK	E14
49VU	COM/CVR/CTL	26RK	E13
FOR FIN: 1000EM1 (ENGINE1)
121VU	ENGINE/IGN/ENG1/SYS A BAT	2JH1	P39
121VU	ENGINE/IGN/ENG1/SYS B	3JH1	P41
121VU	ENGINE/ENG1/FADEC B/AND EIU 1	4KS1	R41
49VU	ENGINE/1/FADEC A/AND EIU 1	2KS1	A04
49VU	ENGINE/1/FIRE DET/LOOP A	7WD1	A06
121VU	ENGINE/ENG1/FIRE DET/LOOP B	8WD1	Q38
122VU	ELEC/GCU/1	2XU1	T26
122VU	ANTI ICE/ENG/1	1DN1	X10
FOR FIN: 1000EM2 (ENGINE2)
121VU	ENGINE/IGN/ENG2/SYS A BAT	2JH2	P40
121VU	ENGINE/IGN/ENG2/SYS B	3JH2	P42
121VU	ENGINE/ENG2/FADEC B	4KS2	Q40
49VU	ENGINE/2/FADEC A/AND EIU 2	2KS2	A05
121VU	ENGINE/ENG2/FIRE DET/LOOP A	7WD2	Q39
49VU	ENGINE/2/FIRE DET/LOOP B	8WD2	A07
122VU	ELEC/GCU/2	2XU2	T27
123VU	Y HYD/ELEC/ELEC PUMP/NORM	3801GX	AB03
123VU	Y HYD/ELEC/PUMP	3802GX	AB06
121VU	HYDRAULIC/HYD POWER/Y	3803GX	N30
122VU	ANTI ICE/ENG/2	1DN2	W10

Subtask 71-00-20-010-065-A ** ON A/C NOT FOR ALL

C. Get Access
(1) Open the fan cowls (Ref. AMM TASK 71-13-00-010-010):
(2) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(3) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(4) Put the ACCESS PLATFORM 1M(3 FT) in position at the engine.

Subtask 71-00-20-040-058-A ** ON A/C NOT FOR ALL

D. Deactivation of the Thrust Reverser

WARNING: MAKE SURE THAT THE THRUST REVERSER HYDRAULIC CONTROL UNIT (HCU) IS DEACTIVATED BEFORE YOU DO WORK ON OR AROUND THE THRUST REVERSER. IF THE HCU IS NOT DEACTIVATED, THERE IS A RISK OF UNWANTED THRUST REVERSER OPERATION WHICH CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.

(1) Do the deactivation of the thrust reverser Hydraulic Control Unit (HCU) (Ref. AMM TASK 78-30-00-040-012).

Hydraulic Control Unit ** ON A/C NOT FOR ALL

Subtask 71-00-20-010-066-A ** ON A/C NOT FOR ALL

E. Open the thrust reverser doors (Ref. AMM TASK 78-32-00-010-010) but do not release the pressure after you put the hold-open rods in position:
(1) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR

Subtask 71-00-20-480-063-A ** ON A/C NOT FOR ALL

F. Install the S889BH0 BRACE - HOLD OPEN COWLS or TMHBS13-00-00 BRACE-HOLD OPEN COWLS to Support the Fan and Thrust Reverser Cowl Doors

Fan Cowl and Thrust Reverser Braces ** ON A/C NOT FOR ALL

(1) Put the adjustable struts (1) and (2) in position.
(2) Adjust the length of the struts so that they hold the weight of the thrust reverser halves.
(3) Put the thrust reverser half hold-open rods in their storage positions (Ref. AMM TASK 78-32-00-410-010).
(4) Open the valve on the hydraulic hand pump.
(5) Install the left and right support arms (4) so that they hold the weight of the fan cowls.

NOTE: The support arms (4) must be installed so that the brackets (3) are on the second latch from the front of the thrust reverser halves.

(6) Put the fan cowl hold-open rods in their storage positions (Ref. AMM TASK 71-13-00-410-010).

Subtask 71-00-20-020-079-A ** ON A/C NOT FOR ALL

G. Removal of Components from the Right and the Left Sides of the Engine
(1) Remove the drains mast (Ref. AMM TASK 71-71-42-000-010).

NOTE: When you install the engine in the transportation stand, it is only necessary to remove the drains mast to prevent damage. It is not necessary to disconnect the drain tubes or remove the collector plate assembly.

(2) Remove the anti-ice duct No. 2 (Ref. AMM TASK 30-21-49-000-011).

4. Procedure
Subtask 71-00-20-480-062-A ** ON A/C NOT FOR ALL

A. Installation of the support equipment:
(1) Install the 98D71203501001 BOOTSTRAP SYSTEM.

Bootstrap Installation ** ON A/C NOT FOR ALL

Bootstrap Installation Manual Hoist Kit ** ON A/C NOT FOR ALL

Bootstrap Installation Electrical Hoist Kit ** ON A/C NOT FOR ALL

(a) Put the rear beam (9) in position on the lower part of the pylon and install the pins (8).
(b) If the bootstrap is equipped with a spacer:
1 Install the spacer (10) on the pylon.
(c) Install the center hinge clamp (6).
(d) Install the clamps (7).
(e) Put the forward hinge arms (4) and (5) in position and install the pins (3).
(f) Make sure that the forward hinge arms (4) and (5) are and remain in the horizontal position.
1 Use the spirit levels installed on the arms.
(g) Install the link (2) and secure with the pins (1).
(h)

Bootstrap Installation ** ON A/C NOT FOR ALL

Bootstrap Installation Manual Hoist Kit ** ON A/C NOT FOR ALL

a Put the dynamometers (4) and the clamps (3) in position on the forward hinge arms (1) and (7) and the rear beam (8).
b Install the pins (2), clamps (3) and dynamometers (4) on the bootstrap system.
c Install the four chain pulley blocks (5).

or

2

Bootstrap Installation Electrical Hoist Kit ** ON A/C NOT FOR ALL

a Put the dynamometric shackle (4) and the clamps (3) in position on the forward hinge arms (1) and (7) and the rear beam (9).
b Install the pins (2), the clamps (3) and the dynamometric shackle (4) on the bootstrap system.
c Install the four electrical hoist 2T (5) and make sure that the dynamometers or the electrical motors are installed outboard of the engine.
(2) Install the S487ETT2 ENGINE TROLLEY or the TMHET06-00-00 TRAILER,ENGINE GROUND HANDLING or the AM2228-B1 BASE.

Engine Handling Points ** ON A/C NOT FOR ALL

(a) Put in position the engine trolley and the S1787CR ENGINE CRADLE or the TMHEC29-00-00 CRADLE,V2500 ENGINE or the AM2228-A1 ENGINE CRADLE assembly from forward to aft, below the engine.
(b) Attach the chain hooks (6) to the engine cradle.
(c) Remove the pins which attach the engine cradle to the engine trolley.
(d) Lift the engine cradle to the engine with the four chain pulley blocks (5) for the manual hoist kit or with the electrical hoist 2T (5) for the electrical hoist kit.
(e) Install the pins of the front fixtures into the engine handling points and then install the rear support on the left and right sides. Attach to the engine with a ball pin.
1 Use the hoists to align the engine cradle with the engine.
(f) Operate the handling hoists at the same time until these values show on the dynamometers (4) (for the manual hoist kit) or on the service desk display (8) (for the ALT71000001 ELECTRICAL HOIST KIT, refer to the user’s guide):
1 1900 -100 daN or +150 daN (4271 -225 lbf or +337 lbf) 1936 kg (4268 lb) for the forward hoists.
2 500 -50 daN or +100 daN (1124 -112 lbf or +225 lbf) 509 kg (1122 lb) for the aft hoists.

NOTE: These values are applicable to the demountable power plant which includes the engine assembly, the air inlet cowl, the Common Nozzle Assembly (CNA).

NOTE: If the mechanics stand on the bootstrap device the weight of the mechanics must be considered at both the forward and the aft positions.

[Rev.10 from 2021] 2026.04.01 12:56:24 UTC