Preservation Renewal Requirements. [CFMB]

TASK 72-00-00-600-008-A
Preservation Renewal Requirements.

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TASK 72-00-00-100-007-A	Engine Dry-out and Re lubrication
TASK 72-00-00-600-006-A	Preservation for a Period of up to 30 Days
TASK 72-00-00-600-007-A	Preservation for a Period of 30 to 365 Days
TASK 72-00-00-600-025-A	Preservation for a Period of up to 90 Days

3. Job Set-up
Subtask 72-00-00-869-069-A ** ON A/C NOT FOR ALL

A. Not Applicable

4. Procedure
Subtask 72-00-00-620-060-A ** ON A/C NOT FOR ALL

A. Preservation renewal requirements
(1) Period up to 30 Days- Operable Engine
(a) If you do a 30-day preservation with engine idle run, this procedure can be renewed five more times for a total duration of 180 days (Ref. AMM TASK 72-00-00-600-006).
(b) If you do a 30-day preservation with engine dry motor, this procedure can be renewed two more times for a total duration of 90 days (Ref. AMM TASK 72-00-00-600-006).

NOTE: During engine idle run, both oil and fuel circulate through its system. During engine dry motor, the fuel does not circulate through the complete fuel system.

(c) After all allowed renewal are performed, the engine should then be preserved per the 90 days or the 30 to 365 days (operable engine) procedure (Ref. AMM TASK 72-00-00-600-025) or (Ref. AMM TASK 72-00-00-600-007).
(2) Period up to 30 Days - Non-operable engine

NOTE: No renewal is allowed, the engine components should be preserved (Ref. AMM TASK 72-00-00-600-025) (Split engine or Engine Modules).

(3) Period up to 90 Days - Operable Engine

NOTE: Before represervation, it is recommended to prelubricate engine sumps by hand-pumping oil through disconnected oil supply lines at lube unit and prelubricate lube unit by hand-pumping oil (Ref. AMM TASK 72-00-00-100-007).

NOTE: When performing renewal, there is no need to drain oil tank and/or add preservation fluid in the oil tank.

NOTE: It is necessary to operate the engine at idle to do this renewal procedure. Dry motoring procedure is not acceptable as an alternative to engine idle run to do preservation renewal.

(a) One renewal is allowed (Ref. AMM TASK 72-00-00-600-025). Then the engine must be preserved per the 30 to 365 day (operable engine) procedure (Ref. AMM TASK 72-00-00-600-007).
(4) Period 30 to 365 days - Operable Engine
(a) Repeat the full procedure. Refer to the original 30 to 365 days preservation procedure (Ref. AMM TASK 72-00-00-600-007).
1 Make sure that the engine is safely attached and protective cover is correctly in place.
(5) Period 30 to 365 days. Non-operable Engine
(a) No renewal is allowed, engine must be serviced and operable.

[Rev.10 from 2021] 2026.04.01 12:59:32 UTC