DOC AIRBUS | AMM A320FProcedure for Exceeded Long Term Preservation Period. [CFMB]
TASK 72-00-00-600-009-A
Procedure for Exceeded Long Term Preservation Period.
1. Reason for the Job
Self explanatory
2. Job Set-up
Subtask 72-00-00-869-071-A ** ON A/C NOT FOR ALL
Subtask 72-00-00-620-061-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 02:40:34 UTC
Procedure for Exceeded Long Term Preservation Period.
1. Reason for the Job
Self explanatory
2. Job Set-up
Subtask 72-00-00-869-071-A ** ON A/C NOT FOR ALL
A. Not Applicable
3. ProcedureSubtask 72-00-00-620-061-A ** ON A/C NOT FOR ALL
A. If the engine preservation period is expired, refer to your CFMI Representative for instruction.
(a) CFM56 engine model and Engine Serial Number and Engine Time Since New/Engine Cycle Since New
(b) Date of last preservation task performed and reference of the task
(c) Date of next expected preservation or run
(d) Total period of improper preservation
(e) Confirm that the last preservation task was performed properly, with the following steps done, as applicable:
1 Oil system preserved
2 Fuel system preserved
3 Variable Bleed Valves were closed and/or sealed with a vapor barrier film or alternative grid protection
4 All open tubes, hoses and electrical connections were capped and plugged
5 Desiccant bags and humidity indicators were installed and monitoring history
6 Engine inlet and exhausts were sealed with vapor barrier film
7 Engine covers were installed (whole engine or inlet and exhaust only)
(f) Desiccant bags replacement history and humidity indicators monitoring history
(g) Engine storage locations and conditions with the information that follows:
1 Inside storage or outside storage
2 Temperature variation and humidity level encountered during out of operation period
3 Confirm exposure to windmilling if engine stored outside without cover
(h) Date when the engine will be available for preservation (the latest possible, in order to know how long the period without preservation renewal will be)
(i) In particular case of an engine which had an In-Flight Shutdown (IFSD), confirmation that dry-out and re-lubrication were performed within 24 hours after IFSD
(j) Engine currently or scheduled to shop visit.
NOTE: An engineering analysis must be used to analyse the situation applicable to each special case.
(1) Make ready to provide for analysis these parameters:(a) CFM56 engine model and Engine Serial Number and Engine Time Since New/Engine Cycle Since New
(b) Date of last preservation task performed and reference of the task
(c) Date of next expected preservation or run
(d) Total period of improper preservation
(e) Confirm that the last preservation task was performed properly, with the following steps done, as applicable:
1 Oil system preserved
2 Fuel system preserved
3 Variable Bleed Valves were closed and/or sealed with a vapor barrier film or alternative grid protection
4 All open tubes, hoses and electrical connections were capped and plugged
5 Desiccant bags and humidity indicators were installed and monitoring history
6 Engine inlet and exhausts were sealed with vapor barrier film
7 Engine covers were installed (whole engine or inlet and exhaust only)
(f) Desiccant bags replacement history and humidity indicators monitoring history
(g) Engine storage locations and conditions with the information that follows:
1 Inside storage or outside storage
2 Temperature variation and humidity level encountered during out of operation period
3 Confirm exposure to windmilling if engine stored outside without cover
(h) Date when the engine will be available for preservation (the latest possible, in order to know how long the period without preservation renewal will be)
(i) In particular case of an engine which had an In-Flight Shutdown (IFSD), confirmation that dry-out and re-lubrication were performed within 24 hours after IFSD
(j) Engine currently or scheduled to shop visit.