Dry Motoring Check [CFMB]

TASK 71-00-00-710-001-B
Dry Motoring Check

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 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: 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.

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

CAUTION: - SEE THE APPLICABLE FIGURE FOR WIND LIMIT RESTRICTIONS WHEN THE ENGINE OPERATES.

NATURAL WINDS AND IRREGULAR FORCES FROM SUDDEN GUSTS INCREASE THE DANGEROUS AREA.
DO NOT GO ABOVE OPEN COWLING LIMITATIONS WHEN YOU DO THE TESTS.
THE OPERATOR MUST FULLY KNOW ALL THE OPERATING LIMITS AND PROCEDURES BEFORE THE ENGINE OPERATES.

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.

ZONE: 210
ZONE: 400

1. Reason for the Job
It is necessary to do a dry motoring check during or after inspection or 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.
2. Job Set-up Information
A. 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 [1000EM1] (ENGINE-1)
437AL, 438AR, 451AL, 452AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR, 461AL, 462AR

B. Referenced Information

REFERENCE	DESIGNATION
TASK 10-11-00-555-013-A	Installation of the Aircraft Protection Equipment
TASK 10-11-00-555-014-A	Removal of the Aircraft Protection Equipment
TASK 12-13-79-610-002-A	Check oil level and replenish Check Pop Out Indicator of EMCD (Electrical Master Chip Detector)
TASK 12-13-79-610-002-A-01	Check oil level and replenish (Pressure Filling)
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 36-12-00-860-001-A	Pressurization of the Bleed System with the APU
TASK 36-12-00-860-002-A	Pressurization of the Bleed System through the HP Ground Connector
TASK 71-00-00-790-002-B	Fuel or Hydraulic or Oil Leakage Limits
TASK 71-00-00-869-003-A	Wind Limitations During Engine Ground Operations
TASK 71-00-00-869-004-A	Safety Precautions During Engine Ground Operations
TASK 71-13-00-010-040-B	Opening of the Fan Cowl Doors
TASK 71-13-00-410-040-B	Closing of the Fan Cowl Doors
TASK 78-30-00-081-041-B	Make the Thrust Reverser Serviceable after Maintenance
TASK 78-30-00-481-041-B	Make the Thrust Reverser Unserviceable for Maintenance
TASK 78-36-00-010-040-B	Opening of the Thrust Reverser Doors
TASK 78-36-00-410-040-B	Closing of the Thrust Reverser Doors
TASK 79-00-00-210-003-A	Visual Inspection of the Oil System

3. Job Set-up
Subtask 71-00-00-869-088-A ** ON A/C NOT FOR ALL

A. Preparation for test

CAUTION: REMOVE THE PROTECTIVE COVERS FROM THE PROBES BEFORE YOU DO THIS PROCEDURE. IF YOU DO NOT REMOVE THEM, THE PROBES AND PROTECTIVE COVERS CAN BECOME DAMAGED OR BURNED.

(1) Remove the protective covers from the probes and sensors before you do this procedure (Ref. AMM TASK 10-11-00-555-014).
(2) Obey the wind limitations and safety precautions during engine ground operations (Ref. AMM TASK 71-00-00-869-003) and (Ref. AMM TASK 71-00-00-869-004).
(3) Make sure that the engine inlet and exhaust covers are removed. Make sure that these areas are clear of unwanted objects.
(4) Make a visual check of the temperature sensors, fan inlet, and exhaust areas. If snow or ice has collected in the fan duct, make sure that the fan turns freely. Also, make sure that the engine inlet, inlet lip, fan, spinner, and fan exhaust duct are clear of ice or snow. If the fan does not turn freely, you must melt the snow or ice with hot air before an engine operation.
(5) Look at the general condition of the fan spinner and fan blades, core exhaust nozzle, LPT and external surfaces of the cowls.
(6) Do a check of the oil quantity. Make a check of the drain ports for fuel, oil and hydraulic leaks (Ref. AMM TASK 71-00-00-790-002). Also make sure that fuel drained from the engine does not cause a fire.

Subtask 71-00-00-010-060-A ** ON A/C NOT FOR ALL

B. Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-040):
(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR.
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR.

Subtask 71-00-00-040-054-A ** ON A/C NOT FOR ALL

C. Make the thrust reverser unserviceable (Ref. AMM TASK 78-30-00-481-041).

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

D. Open the thrust-reverser doors to the 35 degrees position (Ref. AMM TASK 78-36-00-010-040):
(1) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR

Subtask 71-00-00-861-058-A ** ON A/C NOT FOR ALL

E. Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).

Subtask 71-00-00-865-060-A ** ON A/C NOT FOR ALL

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	ENGINE/1 AND 2/IGN/SYS A	1JH	A03
FOR FIN: 1000EM1 (ENGINE1)
49VU	FUEL/LP VALVE/MOT1/ENG1	1QG	A08
49VU	ENGINE/1/FADEC A/AND EIU 1	2KS1	A04
49VU	ENGINE/1/HP FUEL SOV	1KC1	A01
121VU	FUEL/LP VALVE/MOT2/ENG1	3QG	M25
121VU	ENGINE/ENG1/OIL/PRESS	2EN1	N40
121VU	ENGINE/ENG1/OIL/QTY	1EN1	N39
121VU	ENGINE/IGN/ENG1/SYS B	3JH1	P41
121VU	ENGINE/IGN/ENG1/SYS A BAT	2JH1	P39
121VU	ENGINE/ENG1/FADEC B/AND EIU 1	4KS1	R41
FOR FIN: 1000EM2 (ENGINE2)
49VU	FUEL/LP VALVE/MOT1/ENG2	2QG	A09
49VU	ENGINE/2/FADEC A/AND EIU 2	2KS2	A05
49VU	ENGINE/2/HP FUEL SOV	1KC2	A02
121VU	FUEL/LP VALVE/MOT2/ENG2	4QG	M26
121VU	ENGINE/ENG2/OIL/PRESS	2EN2	N42
121VU	ENGINE/ENG2/OIL/QTY	1EN2	N41
121VU	ENGINE/IGN/ENG2/SYS B	3JH2	P42
121VU	ENGINE/IGN/ENG2/SYS A BAT	2JH2	P40
121VU	ENGINE/ENG2/FADEC B	4KS2	Q40

Subtask 71-00-00-869-089-A ** ON A/C NOT FOR ALL

G. 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 a HP ground power unit or the APU (Ref. AMM TASK 36-12-00-860-001) or (Ref. AMM TASK 36-12-00-860-002). Make sure that the pressure of the air supply is between 25 psi (1.7 bar) and 55 psi (3.8 bar).
(2) Make sure that the pressure of the Green reservoir for the engine 1 (Yellow reservoir for the engine 2) is correct.
(3) Make sure that the HYD 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 (Ref. AMM TASK 31-60-00-860-001).

4. Procedure
Subtask 71-00-00-710-071-A ** ON A/C NOT FOR ALL

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.

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 HMU AND THUS PREVENT DAMAGE.

A. Do this test:

ACTION	RESULT
1.Supply the engine with fuel.	NOTE: If the fuel line or fuel equipment has been disconnected/removed dowstream of the LP valve before the FADEC test with engine motoring, start the fuel pumps and open the LP valve.
A.On the HYD/FUEL panel 40VU: Push all the FUEL/PUMPS pushbutton switches.	The OFF legends of these pushbutton switches go off.
B.Open the circuit breaker 1KC1(2) to open the LP valve.	On the upper ECAM display unit this message comes into view: ENG 1(2) LP VALVE OPEN The single chime operates. The MASTER CAUT light comes on. NOTE: If there is an engine fire, the fire shut off valve has an override function to close the pylon LP valve if it was open.
2.Make sure that the throttle control lever of the engine 1(2) is in the idle stop position (zero on the graduated sector).
3.On the ENG panel 115VU:
Set the ENG/MODE/CRANK/NORM/IGN/START selector switch to CRANK.	On the lower ECAM display unit: The ENGINE page comes into view. Make sure that the available air pressure is between 25 psi (1.7 bar) and 55 psi (3.8 bar). Make sure that the quantity of oil in the oil tank of the engine 1(2) is correct. If necessary, fill the oil tank (Ref. AMM TASK 12-13-79-610-002).
4.On the overhead CTL & IND panel 22VU: Push the ENG/MAN START/1(2) pushbutton switch.	The ON legend of this pushbutton switch comes on.
	On the lower ECAM display unit, on the ENGINE page: The symbol for the starter valve is in the open position.
5.Motor the engine as long as it is necessary (in line with the starter limits as given below).
6.Make sure that: The engine operates. The oil pressure indication is positive. NOTE: During cold weather, large oil pressure surges can occur. NOTE: A pressure relief valve in the lubrication unit limits the oil pressure to 305 psi (21 bar). NOTE: The oil level in the oil tank can go down by 1.6 USgal (6 l) during start. NOTE: If a starter air pressure is used that is less than the recommended quantity, slow N2 acceleration and subsequent rpm stop can occur. NOTE: Make sure that you do not go over the starter limits that follow: no engagement of the starter when the core speed is above 20 percent. the acceptable duty cycles can be performed by using one the three following procedures: - 4 consecutive cycles, each of 2 minutes duration with a 20 second rest between 2 consecutive attempts. After 4 cycles, wait 15 minutes to allow starter to cool before you try a new start or motoring. - one 5 minute cycle followed by a cooling period of 2 minutes after the first motoring and a 10 minutes interval between the following ones. After 2 minutes, the fault message "starter time exceeded" appears. Continue normal operation, ignore it. - one 15 minute cycle followed by a 15 minute cooling period before you try a new start or motoring. It is recommended to use the 15 minute cycle only for cooling the engine to do a borescope inspection. NOTE: While the engine is motored, do a visual check for leaks at the fuel and oil system tubes and manifolds.
7.On the 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 display unit, on the ENGINE page: The symbol for the starter valve is in the closed position.
8.On the ENG panel 115VU: Set the ENG/MODE/CRANK/NORM/IGN/START selector switch to NORM.	On the lower ECAM display unit: The ENGINE page goes out of view.
9.On the ECAM control panel: Get the ENGINE page.	On the lower ECAM display unit: The ENGINE page comes into view.
10.On the lower ECAM display unit, on the ENGINE page: After a minimum of 5 minutes after the end of the test, look at the oil level indication.	If necessary, fill the oil tank (Ref. AMM TASK 12-13-79-610-002).
11.After engine shutdown, when the rotor movement stops, on the HYD/FUEL panel 40VU: Release all the FUEL/PUMPS pushbutton switches.	The OFF legends of these pushbutton switches come on.
12.Close the circuit breaker 1KC1(2) to close the LP valve.	On the upper ECAM display unit: The ENG 1(2) LP VALVE OPEN message goes out of view.
	The master CAUT light goes off.

Subtask 71-00-00-200-052-A ** ON A/C NOT FOR ALL

B. Listen for unusual noise.
(1) During engine coastdown, while the components continue to turn, listen for unusual noise from these components.

NOTE: Clicking fan blades, gear noise and seal rubs are normal noise.

Subtask 71-00-00-210-052-A ** ON A/C NOT FOR ALL

C. Do a general visual inspection.

NOTE: Hydromechanical Units (HMUs) that have fluorocarbon (Viton) external seals (SB 73-015) can leak fuel for a short time when they are below 0 deg.C (32.00 deg.F) (Modification 1 and 2) (Ref. AMM TASK 71-00-00-790-002).

(1) Make a check of the engine, fan frame and turbine for unusual roughness.
(2) Make an inspection of the lubrication system lines, fittings and accessories for leaks (Ref. AMM TASK 79-00-00-210-003).

5. Close-up
Subtask 71-00-00-862-058-A ** ON A/C NOT FOR ALL

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

Subtask 71-00-00-869-090-A ** ON A/C NOT FOR ALL

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) Do the EIS stop procedure (Ref. AMM TASK 31-60-00-860-002).
(3) Install the protective covers on the probes and sensors (Ref. AMM TASK 10-11-00-555-013).

Subtask 71-00-00-410-063-A ** ON A/C NOT FOR ALL

C. Close the thrust-reverser doors (Ref. AMM TASK 78-36-00-410-040):
(1) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR

Subtask 71-00-00-440-054-A ** ON A/C NOT FOR ALL

D. Make the thrust reverser serviceable (Ref. AMM TASK 78-30-00-081-041).

Subtask 71-00-00-410-067-A ** ON A/C NOT FOR ALL

E. Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-040):
(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR

[Rev.10 from 2021] 2026.04.01 02:24:37 UTC