Test No. 3A - Idle Power Test [PW11]

TASK 71-00-00-720-811-A
Test No. 3A - Idle Power Test

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AFTER SHUTDOWN. THE ENGINE CAN STAY HOT FOR A LONG TIME. IF YOU DO NOT OBEY THIS INSTRUCTION, INJURY CAN OCCUR.

1. Reason for the Job
Use this procedure to do an operational check of the Engine and a check of the fuel and oil systems for leaks. The engine is operated at idle power only for this test.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 1M(3 FT)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR, 451AL, 452AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR, 461AL, 462AR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01	De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 31-60-00-860-002-A	EIS Stop Procedure
TASK 71-00-00-860-814-A	Shutdown of the Engine
TASK 71-00-00-860-822-A	Start the Engine (Normal Manual Start)
TASK 71-00-00-860-823-A	Start the Engine (Normal Automatic Start)
TASK 71-00-00-910-803-A	Engine Operation Limits and Guidelines
TASK 71-13-00-010-802-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-802-A	Closing of the Fan Cowl Doors
TASK 71-71-00-210-801-A	General Visual Inspection (GVI) of the Engine and Pylon Drain System
TASK 78-30-00-040-805-A	Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-30-00-440-805-A	Reactivation of the Thrust Reverser System after Ground Maintenance
TASK 78-36-00-010-802-A	Opening of the Thrust Reverser Cowl-Doors
TASK 78-36-00-410-802-A	Closing of the Thrust Reverser Cowl-Doors

3. Job Set-up
Subtask 71-00-00-941-133-A ** ON A/C NOT FOR ALL

A. Safety Precautions and Aircraft Maintenance Configuration
(1) Do the job set-up as for an engine start (Ref. AMM TASK 71-00-00-860-823) or (Ref. AMM TASK 71-00-00-860-822).

4. Procedure
Subtask 71-00-00-720-081-A ** ON A/C NOT FOR ALL

A. Run the Engine at Idle

WARNING: BEFORE YOU START THE ENGINE, MAKE SURE THAT:

YOU OBEY ALL THE ENGINE SAFETY PRECAUTIONS
YOU DO ALL THE OPERATIONS NECESSARY TO PREVENT MOVEMENT OF THE AIRCRAFT.

IF YOU DO NOT OBEY THESE PRECAUTIONS, INJURY TO THE PERSONNEL AND DAMAGE TO THE AIRCRAFT AND/OR EQUIPMENT CAN OCCUR.

(1) Start the engine by the automatic start procedure (Ref. AMM TASK 71-00-00-860-823).

NOTE: If you must do test No. 3A and test No. 6, it is possible to start the engine only one time.

NOTE: This is the recommended start method for the usual conditions.

NOTE: The fuel system can contain air after the replacement of fuel components and tubes. If this is the first engine start after the replacement of fuel components or tubes, the fuel flow can change quickly while the air is purged from the fuel system. This temporary condition is usual and satisfactory.

(2) As an option, start the engine by the manual start procedure (Ref. AMM TASK 71-00-00-860-822).
(a) It is recommended that you use the manual start procedure at all high altitude airports.
(b) It is recommended that you use the manual start procedure for starts with low starter air pressure supply (external pneumatic power source).
(3) Let the engine become stable for five minutes at idle power.
(4) Make sure that all the engine parameters are in the permitted limits (Ref. AMM TASK 71-00-00-910-803).
(5) Do the shutdown of the engine (Ref. AMM TASK 71-00-00-860-814).

Subtask 71-00-00-010-184-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR
(2) Put an ACCESS PLATFORM 1M(3 FT) in position.

Subtask 71-00-00-040-103-A ** ON A/C NOT FOR ALL

C. Deactivation of the Thrust Reverser System for Maintenance

WARNING: MAKE SURE THAT YOU DO THE DEACTIVATION OF THE THRUST REVERSER BEFORE YOU DO MAINTENANCE WORK ON OR AROUND THE THRUST REVERSER. IF YOU DO NOT DO THIS PROCEDURE, THERE IS A RISK OF UNWANTED OPERATION AND THUS OF INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.

(1) Do the deactivation of the thrust reverser system for maintenance (Ref. AMM TASK 78-30-00-040-805).

Subtask 71-00-00-010-185-A ** ON A/C NOT FOR ALL

D. Get Access
(1) Open the thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL 462AR
(2) Put an ACCESS PLATFORM 1M(3 FT) in position.

Subtask 71-00-00-210-103-A ** ON A/C NOT FOR ALL

E. Visual Check
(1) Do a visual check of the fuel and oil system tubes, fittings, manifolds and components for leaks.

NOTE: This procedure can be used to find a leak at any of the external fuel or oil system tubes and components. This procedure can also be used after a maintenance component removal and replacement procedure.

(2) Look at the engine cases for oil and fuel stains.
(3) Repair or replace the tubes, fittings, and components as necessary, if you find leakage.
(4) Do a General Visual Inspection (GVI) of the engine and pylon drain system for leaks (Ref. AMM TASK 71-71-00-210-801).
(5) Do this procedure again as a leak check after you replace or repair the tubes, tube flanges, fittings and components, if necessary.

5. Close-up
Subtask 71-00-00-860-212-A ** ON A/C NOT FOR ALL

A. Put the aircraft back to its initial configuration.
(1) Do the EIS stop procedure
(Ref. AMM TASK 31-60-00-860-002).
(2) Remove the access platform(s).
(3) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

Subtask 71-00-00-410-173-A ** ON A/C NOT FOR ALL

B. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL 462AR

Subtask 71-00-00-440-097-A ** ON A/C NOT FOR ALL

C. Do the reactivation of the thrust reverser system after the deactivation for maintenance (Ref. AMM TASK 78-30-00-440-805).

Subtask 71-00-00-410-174-A ** ON A/C NOT FOR ALL

D. Put the aircraft back to its initial configuration.
(1) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR

[Rev.10 from 2021] 2026.04.01 04:27:44 UTC