Dry-Motoring Check [CFML]

TASK 71-00-00-700-805-A
Dry-Motoring Check

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: MAKE SURE THAT ALL ENGINE OPERATING AREAS ARE AS CLEAN AS POSSIBLE. ALL RAMPS, TAXIWAYS, RUNWAYS AND OTHER OPERATING AREAS MUST BE VERY CLEAN TO PREVENT BAD DAMAGE TO THE ENGINE, AIRCRAFT AND PERSONS IN THE AREA.

WARNING: DO NOT TRY TO STOP THE FAN FROM TURNING BY HAND. THIS CAN CAUSE INJURY TO THE PERSONS AND DAMAGE TO THE EQUIPMENT.

WARNING: MAKE SURE THAT THE LANDING GEAR GROUND SAFETIES AND THE WHEEL CHOCKS ARE IN POSITION. MOVEMENT OF THE AIRCRAFT CAN BE DANGEROUS.

WARNING: MAKE SURE THAT THE TRAVEL RANGES OF THE FLIGHT CONTROLS SURFACES ARE CLEAR. MOVEMENT OF FLIGHT CONTROLS CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.

WARNING: DO NOT TOUCH THE PROBES DURING OR IMMEDIATELY AFTER THIS PROCEDURE. THE PROBES WILL BE HOT AND CAN BURN YOU.

CAUTION: DO NOT REPLACE AN IDLE LEAK CHECK BY A MOTORING TEST. YOU CANNOT DETECT POTENTIAL OIL LEAKS WITH A MOTORING TEST. IF YOU DO A MOTORING TEST INSTEAD OF AN IDLE LEAK CHECK, YOU CAN CAUSE AN ENGINE SHUTDOWN.

CAUTION: MAKE SURE THAT THERE IS NO HYDRAULIC GROUND POWER SUPPLY CONNECTED TO THE AIRCRAFT WHEN YOU DO THIS PROCEDURE. IF A HYDRAULIC GROUND POWER SUPPLY IS CONNECTED, THERE IS A RISK OF DAMAGE TO THE ENGINE PUMPS.

CAUTION: REMOVE THE PROTECTIVE COVERS FROM THE PROBES BEFORE YOU DO THIS PROCEDURE.

ZONE: 210
ZONE: 400

1. Reason for the Job
It is necessary to do a dry-motoring check during the inspection or after maintenance. The dry-motoring check makes sure that the engine will turn freely and that the instruments operate correctly, and that the operation of the starter obeys the speed requirements for correct starts. You can use the dry-motoring to dry the remaining fuel that can collect in the combustion chamber or the lower section of the turbine casing.
A dry Motoring check can also be used for leak Check of Fuel System LRUs located upstream of the FMU HPSOV.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
210	CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD
400	POWER PLANT, NACELLES AND PYLONS
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL, 438AR, 451AL, 452AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL, 448AR, 461AL, 462AR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 12-13-79-610-805-A	Check of the Oil Level and Replenishing
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
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 31-60-00-860-001-A	EIS Start Procedure
TASK 31-60-00-860-002-A	EIS Stop Procedure
TASK 36-12-00-860-805-A	Pressurization of the Bleed System with the APU
TASK 36-12-00-860-806-A	Pressurization of the Bleed System through the HP Ground Connector
TASK 71-00-00-790-805-A	Fuel or Hydraulic or Oil Leakage Limits
TASK 71-00-00-869-802-A	Wind Limitations During Engine Ground Operations
TASK 71-00-00-869-803-A	Safety Precautions During Engine Ground Operations
TASK 71-13-00-010-803-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-803-A	Closing of the Fan Cowl Doors
TASK 78-30-00-040-809-A	Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-30-00-440-809-A	Reactivation of the Thrust Reverser System after Ground Maintenance
TASK 78-36-00-010-806-A	Opening of the Thrust Reverser Cowl Doors
TASK 78-36-00-410-806-A	Closing of the Thrust Reverser Cowl Doors

3. Job Set-up
Subtask 71-00-00-869-363-A

A. Preparation for Test
(1) Obey the wind limitations and safety precautions during engine ground operations (Ref. AMM TASK 71-00-00-869-802) and (Ref. AMM TASK 71-00-00-869-803).
(2) Make sure that the engine inlet and exhaust covers are removed. Make sure that these areas are clear of unwanted objects.
(3) Do a visual check of the fan inlet, temperature sensor and exhaust areas.

NOTE: Make sure that the engine inlet, inlet lip, fan, spinner and fan exhaust duct are clear of ice or snow. Melt the ice or snow if the fan does not turn freely.

(4) Look at the general condition of the fan spinner and fan blades, core exhaust nozzle, LPT and external surfaces of the cowls.
(5) Do a check of the oil quantity (Ref. AMM TASK 12-13-79-610-805).
(6) Do a check of the drain ports for fuel, oil and hydraulic leaks (Ref. AMM TASK 71-00-00-790-805).
(7) Remove covers from TAT, AOA, and PITOT probes.

Subtask 71-00-00-941-141-A

B. Safety Precautions
(1) On the center pedestal, on ENG panel 115VU:
(a) Make sure that the ENG/MODE selector switch is in the NORM position.
(b) Make sure that the ENG/MASTER 1(2) control switch was in the OFF position not less than five minutes before you do this procedure.

Subtask 71-00-00-010-192-A

C. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-803) if required:
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
(2) Put an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position.

Subtask 71-00-00-040-107-A

D. Deactivation of the Thrust Reverser System for Maintenance if required:

WARNING: YOU MUST DEACTIVATE THE THRUST REVERSER BEFORE YOU DO WORK ON OR AROUND IT. IF YOU DO NOT, THE THRUST REVERSER CAN OPERATE ACCIDENTALLY AND CAUSE AN INJURY AND/OR DAMAGE.

(1) Do the deactivation of the thrust reverser system for maintenance (Ref. AMM TASK 78-30-00-040-809).

Subtask 71-00-00-010-193-A

E. Open the thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-010-806) if required:
(1) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL 452AR
(2) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL 462AR

Subtask 71-00-00-861-110-A

F. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).

Subtask 71-00-00-865-181-A

G. Make sure that this(these) circuit breaker(s) is(are) closed:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	ENGINE/1 AND 2/IGN/SYS A	1JH	A03
FOR FIN: 4020KM1 (POWER PLANTDEMOUNTABLE, ENGINE 1)
49VU	FUEL/LP VALVE/MOT1/ENG1	1QG	A08
49VU	ENGINE/1/FADEC A/AND EIU 1	2KS1	A04
121VU	FUEL/LP VALVE/MOT2/ENG1	3QG	M25
121VU	ENGINE/IGN/ENG1/SYS B	3JH1	P41
121VU	ENGINE/ENG1/FADEC B/AND EIU 1	4KS1	R40
FOR FIN: 4020KM2 (POWER PLANTDEMOUNTABLE, ENGINE 2)
49VU	FUEL/LP VALVE/MOT1/ENG2	2QG	A09
49VU	ENGINE/2/FADEC A/AND EIU 2	2KS2	A05
121VU	FUEL/LP VALVE/MOT2/ENG2	4QG	M26
121VU	ENGINE/IGN/ENG2/SYS B	3JH2	P42
121VU	ENGINE/ENG2/FADEC B/AND EIU2	4KS2	R41

Subtask 71-00-00-869-360-A

H. Continue to Prepare for Test

CAUTION: MAKE SURE THAT THE HYDRAULIC RESERVOIR PRESSURE IS IN THE CORRECT OPERATION RANGE BEFORE YOU START THE ENGINE. THE HYDRAULIC FLUID IS NECESSARY TO LUBRICATE THE HYDRAULIC PUMPS THAT THE ENGINE OPERATES.

(1) Supply the aircraft pneumatic system from the HP ground power unit or the APU (Ref. AMM TASK 36-12-00-860-806) or (Ref. AMM TASK 36-12-00-860-805).
(2) On the lower ECAM display unit:
(a) Get the HYDRAULIC page.
(b) Make sure that the pressure of the Green reservoir for engine 1 (Yellow reservoir for engine 2) is correct.
(c) Make sure that the reservoir fluid level is correct.
(3) Make sure that the engine 1(2) pump is serviceable (on the HYD/FUEL panel 40VU, the OFF legend of the ENG 1(2) PUMP pushbutton switch must be off).
(4) Do the EIS start procedure (upper ECAM DU and lower ECAM DU only)
(Ref. AMM TASK 31-60-00-860-001).

Subtask 71-00-00-865-199-A

I. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	ENGINE/2/HP FUEL SOV	1KC2	A02
49VU	ENGINE/1/HP FUEL SOV	1KC1	A01

4. Procedure

CAUTION: DO NOT OPERATE THE ENGINE IF THE FUEL INLET PRESSURE IS NOT POSITIVE (THE FUEL IS NECESSARY TO LUBRICATE THE ENGINE FUEL PUMP AND THE FMU AND THUS PREVENT DAMAGE).

CAUTION: MAKE SURE THAT THE ENG/MASTER 1(2) CONTROL SWITCH (ON THE PANEL 115VU) IS SET TO OFF BEFORE YOU START THE FUEL PUMPS.

Subtask 71-00-00-710-247-A

A. Do this test:

ACTION	RESULT
1.On HYD/FUEL panel 40VU: Push all the FUEL/PUMPS pushbutton switches.	The OFF legends of these pushbutton switches go off.
2.Select the "FUEL" SD page to make sure that the LP valve is open.
3.Make sure that the throttle control lever on engine 1(2) is in the idle stop position (zero on the graduated sector).
4.On ENG panel 115VU: Set the ENG/MODE/CRANK/NORM/IGN/START selector switch to CRANK.	On the lower ECAM Display Unit (DU): The ENGINE page comes into view. Make sure that the available air pressure is between 25 psi (2 bar) and 55 psi (4 bar). Make sure that the quantity of oil in the oil tank of engine 1(2) is correct. If necessary, fill the oil tank (Ref. AMM TASK 12-13-79-610-805).
5.On OVERHEAD CTL & IND panel 22VU: Push the ENG/MAN/START/1(2) pushbutton switch. NOTE: In cold weather conditions, important oil-pressure surges can occur. NOTE: You can do a motoring of the engine as long as necessary if it is in the starter limits given below: The starter is not engaged when the core speed is above 63 percent. The permitted starter duty cycles are: * Three motoring cycles one after the other. Each cycle has a duration of two minutes, and there is a rest period of 60 seconds between each cycle. At the end of this rest period, a 15-minute cooling period occurs before a new start or motoring cycle. * Three motoring cycles one after the other. Each cycle has a duration of five minutes, and there is a rest period of five minutes between each cycle. At the end of this rest period, a 15-minute cooling period occurs before a new start or motoring cycle.	The ON legend of this pushbutton switch comes on. On the lower ECAM DU, on the ENGINE page: The symbol for the starter valve is in the open position. Make sure that: The engine turns. The oil pressure indication is positive. While the engine does a motoring, do a visual check for leaks at the fuel and oil system tubes and manifolds.
6.On OVERHEAD CTL & IND panel 22VU: Release the ENG/MAN/START/1(2) pushbutton switch.	The ON legend of this pushbutton switch goes off. On the lower ECAM DU on the ENGINE page: The symbol for the starter valve is in the closed position.
Listen for unusual noise from the engine during the coast-down.	The engine motoring stops and the engine coast-down starts. NOTE: Gear noise and seal rubs are usual noise.
7.On ENG panel 115VU: Set the ENG/MODE/CRANK/IGN/START selector switch to NORM.	On the lower ECAM DU: The ENGINE page goes out of view.
8.On HYD/FUEL panel 40VU: Release all the FUEL/PUMPS pushbutton switches.	The OFF legends of these pushbutton switches come on.
9.On the ECAM control panel: Select the ENGINE page.	On the lower ECAM DU: The ENGINE page comes into view.

Subtask 71-00-00-210-108-A

B. Do a General Visual Inspection (GVI)
(1) Check the engine oil level and service as necessary (Ref. AMM TASK 12-13-79-610-805).
(a) If servicing is required, do servicing of the oil tank but fill the oil tank to the "MAX" mark minus 3 quarts.
(2) Do an inspection of the fuel and oil lines, fittings and components for leaks (Ref. AMM TASK 71-00-00-790-805).
(3) Do an inspection of the fan inlet and turbine exhaust for abnormal conditions.

Subtask 71-00-00-865-200-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	ENGINE/2/HP FUEL SOV	1KC2	A02
49VU	ENGINE/1/HP FUEL SOV	1KC1	A01

5. Close-up
Subtask 71-00-00-862-097-A

A. De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

Subtask 71-00-00-869-362-A

B. Put the aircraft back to its initial configuration.
(1) Stop the pneumatic supply to the aircraft.
(a) Disconnect the HP ground power unit or stop the APU.
(2) If necessary, make sure that the probes are cold and, install the covers that you removed from the TAT, AOA and PITOT probes.
(3) Do the EIS stop procedure
(Ref. AMM TASK 31-60-00-860-002).

Subtask 71-00-00-410-179-A

C. 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 78-36-00-410-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL 462AR

Subtask 71-00-00-440-100-A

D. Do the reactivation of the thrust reverser after maintenance (Ref. AMM TASK 78-30-00-440-809).

Subtask 71-00-00-410-180-A

E. Close Access
(1) Remove the access platform(s).
(2) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
(3) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 04:32:33 UTC