Depreservation of Installed Engine [IAE]

TASK 71-00-00-550-011-A
Depreservation of Installed Engine

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

CAUTION: ENGINES WHICH HAVE NOT OPERATED IN THE LAST 7 DAYS MUST BE GROUND RUN BEFORE RETURN TO SERVICE. THE OIL FILTERS MUST THEN BE EXAMINED FOR CARBON PARTICLES. THESE PARTICLES CAN BLOCK THE OIL FILTERS AND CAUSE ENGINE FAILURE.

ZONE: 400

1. Reason for the Job
This task gives instructions to put the installed V2500 engine back in to service after preservation.

NOTE: Refer to AMM TASK 71-00-00-550-010 for the applicable preservation procedure.

2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	WARNING NOTICE(S)
98F10103500000	2	CHOCK-MLG,ENGINE RUN-UP

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.V01-115)	white spirit
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

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

D. Referenced Information

REFERENCE	DESIGNATION
TASK 12-13-79-610-011-A	Check Oil Level and Replenish
TASK 12-13-80-600-010-B	Replenishment of Starter Oil System
TASK 71-00-00-710-012-B	Test No.3 : Idle Leak Check
TASK 71-00-00-710-013-C	Test No.11 : High Power Assurance Test
TASK 71-00-00-710-013-C	Test No.11 : High Power Assurance Test
TASK 71-00-00-710-018-A	Discontinued Start, Restart and Shutdown Procedures
TASK 71-00-00-710-043-A	Normal Engine Automatic-Start Procedure
TASK 71-00-00-710-046-B	Test No.2 : Wet Motor Leak Check
TASK 71-00-00-710-047-A	Normal Engine Manual-Start Procedure
TASK 71-00-00-860-010-B	Engine Operation Limits, Guidelines and Special Procedures
TASK 71-00-00-860-012-A	Engine Safety Precautions
TASK 71-13-00-410-010-A	Closing of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 72-00-00-600-011-A	Lubrication of the LPC Bleed Valve Mechanism
TASK 75-32-42-640-010-B	Lubrication of HP Compressor Variable Stator Vane (VSV) Mechanism
TASK 75-32-42-640-802-A	Lubrication of the HP Compressor Variable Stator Vane (VSV) Mechanism
TASK 79-00-00-200-012-A	Inspection of the Oil Filters
Storage Requirements for Installed Engines
Air Intake and Common Nozzle Covers
Tool Installation

3. Job Set-up
Subtask 71-00-00-860-066-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) On the ENG panel 115VU, make sure that a WARNING NOTICE(S) is in position to tell persons that the engine 1(2) is in preservation.
(2) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off. Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).

4. Procedure
Subtask 71-00-00-550-063-A ** ON A/C NOT FOR ALL

A. Depreservation after Short-Term Storage

NOTE: If the engine is undergoing consecutive short-term preservation intervals, the long-term depreservation task must be performed.

NOTE: If the engine has undergone one short-term preservation cycle, an optional high-power run (Ref. AMM TASK 71-00-00-710-013) may be performed based on the operator's experience in order to actuate the bleed valves.

(1) Return to service of engines which were stored outside or in an uncontrolled environment inside for less than 31 days, or inside a humidity-controlled environment for less than 90 days with the applicable preservation procedures:

Storage Requirements for Installed Engines ** ON A/C NOT FOR ALL

(a) Remove the air intake cover and the common nozzle cover.

Air Intake and Common Nozzle Covers ** ON A/C NOT FOR ALL

(b) Remove all of the PolyVinyl Chloride (PVC) sheets and the tape used to seal the openings in the fan cowls and the thrust reverser halves.
(c) Remove the Volatile Protective Inhibitor (VPI) paper from the air intake and the exhaust.
(d) Remove the desiccant, the related VPI paper and the humidity indicators from the air intake and the exhaust.
(e) Service the starter with oil (Ref. AMM TASK 12-13-80-600-010).
(f) Check the engine oil level and replenish as necessary (Ref. AMM TASK 12-13-79-610-011).
(g) Continue with step 4.D.

Subtask 71-00-00-550-055-A ** ON A/C NOT FOR ALL

B. Depreservation after Long-Term Storage
(1) Return to service of engines which were stored outside or in an uncontrolled environment inside for more than 31 days, or inside a humidity-controlled environment for more than 90 days but less than 6 months with applicable preservation procedures:

Storage Requirements for Installed Engines ** ON A/C NOT FOR ALL

(a) Remove the air intake cover and the common nozzle cover.

Air Intake and Common Nozzle Covers ** ON A/C NOT FOR ALL

(b) Remove all of the PVC sheets and tape used to seal the openings in the fan cowls and the thrust reverser halves.
(c) Remove the VPI paper from the air intake and the exhaust.
(d) Remove the desiccant, the related VPI paper and the humidity indicators from the air intake and the exhaust.
(e) Use a Textile-Lint free Cotton - (Material No.14SBA1) made moist with white spirit (Material No.V01-115) to remove the corrosion preventative from these components on the thrust reverser halves:
1 The actuators
2 The valves
3 The equipment housing
4 The hydraulic tubes.
(f) Lubricate the Variable Stator Vane (VSV) mechanism:
1 A1 engines only (Ref. AMM D/O 75-32-42-64)
2 A5 basic (non SelectOne) engines and A5 SelectOne retrofit engines (Ref. AMM TASK 75-32-42-640-010)
3 A5 engines only (SelectOne Production Standard) (Ref. AMM TASK 75-32-42-640-802).
(g) Lubricate the 2.5 bleed system:
1 A5 engines only (Ref. AMM TASK 72-00-00-600-011).
(h) Service the starter with oil (Ref. AMM TASK 12-13-80-600-010).
(i) Fill the engine oil tank (Ref. AMM TASK 12-13-79-610-011).
(j) Continue with step 4.D.

Subtask 71-00-00-550-056-B ** ON A/C NOT FOR ALL

C. Depreservation after Long-Term Storage
(1) Return to service of engines which were stored for more than 6 months but less than 12 months with applicable preservation procedures:

Storage Requirements for Installed Engines ** ON A/C NOT FOR ALL

(a) Remove the air intake cover and the common nozzle cover.

Air Intake and Common Nozzle Covers ** ON A/C NOT FOR ALL

(b) Remove all of the PVC sheets and the tape used to seal the openings in the fan cowls and the thrust reverser halves.
(c) Remove the VPI paper from the air intake and the exhaust
(d) Remove the desiccant, the related VPI paper and the humidity indicators from the air intake and the exhaust.
(e) Use the Textile-Lint free Cotton - (Material No.14SBA1) made moist with white spirit (Material No.V01-115) to remove the corrosion preventative from these components on the thrust reverser halves:
1 The actuators
2 The valves
3 The equipment housing
4 The hydraulic tubes.
(f) Lubricate the VSV mechanism:
1 A1 engines only (Ref. AMM D/O 75-32-42-64).
2 A5 basic (non SelectOne) engines and A5 SelectOne retrofit engines (Ref. AMM TASK 75-32-42-640-010).
3 A5 engines only (SelectOne Production Standard) (Ref. AMM TASK 75-32-42-640-802).
(g) Lubricate the 2.5 bleed system:
1 A5 engines only (Ref. AMM TASK 72-00-00-600-011).
(h) Service the starter with oil (Ref. AMM TASK 12-13-80-600-010).
(i) Fill the engine oil tank (Ref. AMM TASK 12-13-79-610-011).
(j) Wet-motor the engine until fuel comes out of the exhaust (Ref. AMM TASK 71-00-00-710-046).
(k) Continue with step 4.D.

Subtask 71-00-00-720-052-C ** ON A/C NOT FOR ALL

CAUTION: DURING GROUND RUNNING, CONCERN FOR FAN BLADE INTEGRITY PROHIBITS STABILISED ENGINE OPERATION IN THE FOLLOWING SPEED RANGE:

FOR PRE-SCN17/V A/C: DO NOT STABILISE THE ENGINE BETWEEN 61% TO 74% N1 SPEED RANGE
FOR POST-SCN17/V A/C: STABILISED OPERATION OF THE ENGINE BETWEEN APPROXIMATELY 60% TO 74% N1 SPEED RANGE (LIMITS ARE A FUNCTION OF OUTSIDE TEMPERATURE) WILL BE PROHIBITED BY THE EEC, AS THE SOFTWARE INCLUDES THE KEEP-OUT-ZONE FOR ON-GROUND, STATIC OPERATION.

D. Operate the Engine

NOTE: A ground run is not necessary for engines that operated in the last seven days before they went back to the service.

NOTE: For general information, refer to the engine safety precautions (Ref. AMM TASK 71-00-00-860-012) and to the engine operation limits, guidelines and special procedures (Ref. AMM TASK 71-00-00-860-010).

(1) If, after the engine start, you must operate the engine at high power, use the 98F10103500000 CHOCK-MLG,ENGINE RUN-UP.

Tool Installation ** ON A/C NOT FOR ALL

(a) Put the 98F10103500000 CHOCK-MLG,ENGINE RUN-UP in position against the wheel.
(b) Pull up the tow bar in the top position until it touches the weld stops.
(2) Make sure that all desiccant, blanks/covers and tape are removed from the engine.
(3) Start the engine (Ref. AMM TASK 71-00-00-710-043) or (Ref. AMM TASK 71-00-00-710-047).
(4) Operate the engine as necessary until the oil temperature is 220 deg.F (104 deg.C) or more (Ref. AMM TASK 71-00-00-710-012) or (Ref. AMM TASK 71-00-00-710-013). Continue to operate the engine for ten minutes while you monitor the oil pressure and temperature.
(5) Make sure that the oil pressure and temperature stay in the limits.
(6) Set the engine to MIN IDLE and let it become stable for five minutes.

NOTE: It is possible that you will not get the necessary oil temperature during an engine run at ground idle when the external temperature is less than 77 deg.F (25 deg.C).

(7) Operate the thrust reverser in one cycle.
(8) Stop the engine (Ref. AMM TASK 71-00-00-710-018).
(9) Examine the pressure and scavenge oil filters (Ref. AMM TASK 79-00-00-200-012).
(a) If you find carbon particles, install new filters.
(b) Operate the engine and examine the filters again.
(c) If you find no carbon particles, send the engine back to the service.

NOTE: This examination is not necessary if you must do the preservation of the engine again.

(10) Do a check for leaks from the drain mast.

5. Close-up
Subtask 71-00-00-410-085-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Close the fan cowls (Ref. AMM TASK 71-13-00-410-010):
(2) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(3) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(4) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 02:27:50 UTC