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

 4. Procedure
_________ Subtask 71-00-00-790-060
 A. To Identify the Source of the Leak at the Drain Mast WARNING : - ENGINE OPERATION MUST NOT EXCEED MINIMUM IDLE WHEN PERSONNEL
_______
 ARE IN ENTRY/EXIT CORRIDOR.

 - POSITIVE COMMUNICATION BETWEEN THE FLIGHT COMPARTMENT AND PERSONNEL IN ENTRY EXIT CORRIDOR IS NECESSARY.

 - INLET AND EXHAUST HAZARD AREAS MUST BE STRICTLY OBSERVED BY PERSONNEL IN ENTRY/EXIT CORRIDOR.

 (1) To check for fuel leaks at the drain mast, do the following steps:

 (a) Start the engine (Ref. TASK 71-00-00-710-003).

 (b) Let the engine become stable at minimum idle for 5 minutes.

 (c) Shut-down the engine (Ref. TASK 71-00-00-710-028).

 (2) To check for oil leaks at the drain mast, do the following steps:

 (a) Start the engine (Ref. TASK 71-00-00-710-003).

 (b) Let the engine become stable at minimum idle for 5 minutes.

 (c) Slowly accelerate the engine and stabilize at 70 percent N1 for 5 minutes.

 (d) Shut-down the engine (Ref. TASK 71-00-00-710-028).

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 (3) Measure the individual leakage quantities collected from each plastic bottle. For the fuel, oil and hydraulic fluid leakage limits (Ref. TASK 71-00-00-790-002).
 5. Close-up
________
 Subtask 71-00-00-010-107
 A. Get Access
 (1) Open the fan cowl doors (Ref. TASK 71-13-00-010-040):
 FOR 1000EM1
 437AL, 438AR
 FOR 1000EM2
 447AL, 448AR

 (2) Put the access platform in position.

 (3) Open the thrust reverser doors (Ref. TASK 78-36-00-010-040): FOR 1000EM1 451AL, 452AR FOR 1000EM2 461AL, 462AR

 Subtask 71-00-00-869-200
 B. Reconnect drain lines.
 (1) Remove the plastic bottles and tubes.

 (2) Reconnect the drain lines.

 Subtask 71-00-00-410-103
 C. Close Access
 (1) Make sure that the work area is clean and clear of tool(s) and other items.

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

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 D. Make the thrust reverser serviceable (Ref. TASK 78-30-00-081-041). Subtask 71-00-00-410-104
 E. Close Access
 (1) Close the fan cowl doors (Ref. TASK 71-13-00-410-040): FOR 1000EM1 437AL, 438AR FOR 1000EM2 447AL, 448AR

 (2) Remove the access platform(s).

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 COWLING - DESCRIPTION AND OPERATION

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 1. General
_______ (Ref. Fig. 001, 002) The cowls enclose the periphery of the engine so as to form the engine nacelle. The nacelle provides :
 - protection for the engine and the accessories

 - airflow around the engine during its operation.

 - lightning protection

 - HIRF and EMI attenuation
 This section is a description of the following cowls :

 - air intake cowl

 - fan cowl

 - the thrust reversers and the primary exhaust (Ref. 78-00-00).

 NOTE : Fan cowls and thrust reversers are not removed for an engine change.
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 Nacelle Components
 Figure 001

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 Nacelle Access Doors and Openings
 Figure 002

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 AIR INTAKE COWL - DESCRIPTION AND OPERATION

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