B. Do an idle check (Ref. TASK 71-00-00-710-006) and check for leaks. Subtask 72-00-00-610-055
R  C. Do a check of the oil level (Ref. TASK 12-13-79-610-002). Subtask 72-00-00-440-082
 D. Make the thrust reverser serviceable (Ref. TASK 78-30-00-081-041). Subtask 72-00-00-410-150
 E. Close-up
 (1) Close the fan cowl doors (Ref. TASK 71-13-00-410-040): FOR 1000EM1 437AL, 438AR FOR 1000EM2 447AL, 448AR

 (2) Remove the warning notice(s).

 (3) Remove the access platform(s).

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 ENGINE - GENERAL - SERVICING

____________________________
 TASK 72-00-00-600-026
 Recommendations for Engine Preservation
 1. Reason for the Job
__________________

 Self Explanatory
 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE DESIGNATION

 -------------------------------------------------------------------------------
72-00-00-600-006 Preservation for a Period up to 30 Days.
 72-00-00-600-007 Preservation for a Period of 30 to 365 Days.
 72-00-00-600-008 Preservation Renewal Requirements.
 72-00-00-600-009 Procedure for Exceeded Long Term Preservation Period.
 72-00-00-600-025 Preservation for a Period up to 90 Days.
 72-00-00-600-027 Depreservation

R 75-31-20-820-001 Set the Variable Bleed Valve Assembly to the Closed
R position
 3. Job Set-up
__________
 Subtask 72-00-00-869-073
 A. Not Applicable
 4. Procedure
_________
 Subtask 72-00-00-620-062
 A. Engine preservation
 (1) The procedures which follow are recommended as the minimum necessary, to protect the CFM56 engine against corrosion, liquid and debris entering the engine, and atmospheric conditions during periods of storage, and inactivity ; or following an engine-out ferry, or landing following an In Flight Shut Down (IFSD). These procedures are also recommended for installed engines on inoperative aircraft or an engine not to be operated for more than thirty days.
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 (2) Preservation Tasks The procedure recommended for preservation of the engine will vary depending upon the duration of inactivity, the type of preservation used, and if the engine is operable or non-operable.

 NOTE : Engines that can be started are considered operable. Engines
____ that for any reason can not be started are considered non-operable. Preservation renewal procedures are also covered in this instruction.
 (3) The preservation procedure to be used will be selected based upon the following schedule:
 (a) Up to 30 days (Ref. TASK 72-00-00-600-006).

 (b) Up to 90 days (Ref. TASK 72-00-00-600-025).

 (c) 30 to 365 days (Ref. TASK 72-00-00-600-007).

 (d) Preservation renewal requirements (Ref. TASK 72-00-00-600-008).

 (e) Procedure for exceeded long term preservation (Ref. TASK 72-00-00-600-009).

 (f) Depreservation (Ref. TASK 72-00-00-600-027).

 NOTE : There is no restriction on the number of times the
____ preservation procedure can be renewed, as long as it is accomplished every year.
 (4) Preservation Program The preservation procedures in this section are recommended as guide in determining what precautions shoud be exercised to provide adequate protection to the engine from the elements during periods of storage and inactivity. Engine preservation is a flexible program that should be implemented in such a manner which best fits the particular weather and storage conditions involved. A program for inactive engines exposed to high humidity and/or large temperature changes, especially if near a salt water area, definitely requires more attention to preservation needs than those engines stored in drier climates or less severe weather conditions. The preservation program for spare and/or stored engines must be planned in advance to implement the preservation renewal requirements and monitored regularly to assure that the required action is implemented prior to the expiration of the preservation period. Dependent upon weather conditions and the condition of the engine protection equipment covers, the effectiveness of the preservation
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