Preservation of the Main Line Bearings [IAE]

TASK 71-00-00-550-012-A
Preservation of the Main Line Bearings

WARNING: DO NOT LET ENGINE OIL STAY ON YOUR SKIN FOR A LONG TIME. FLUSH THE OIL FROM YOUR SKIN WITH WATER. THE OIL IS POISONOUS AND CAN GO THROUGH YOUR SKIN AND INTO YOUR BODY.

CAUTION: DRAINED OIL MUST NOT BE RETURNED TO THE SYSTEM.

CAUTION: THE OIL SPECIFIED FOR USE IN THIS SYSTEM CAN DAMAGE PAINTWORK AND CERTAIN TYPES OF RUBBER. IT MUST NOT BE ALLOWED TO CONTAMINATE THOSE PARTS OF THE ENGINE NOT NORMALLY IN CONTACT WITH IT. OIL SPILLED DURING SERVICING MUST BE WIPED UP IMMEDIATELY WITH A CLEAN LINT FREE CLOTH.

CAUTION: CONTAMINATION BY TINY AMOUNTS OF CERTAIN ALKALI CLEANING FLUIDS CAN CAUSE COMPLETE BREAKDOWN OF THE SYNTHETIC OIL. USE SCRUPULOUSLY CLEAN CONTAINERS AND EQUIPMENT.

NOTE: This subtask is only necessary if the engine is to be stored after a period of service operation.

NOTE: If the engine is not installed on an aircraft, the engine must be installed in a test cell before the procedure can be carried out.

NOTE: This task is not applicable to new engines or overhauled engines.

1. Reason for the Job
This task gives the procedure for the preservation of the main line bearings. It is for an installed engine that can be operated without damage being caused to the engine.
2. Job Set-up Information
A. Consumable Materials

REFERENCE	DESIGNATION
(Material No.V10-077)	lubricant (engine oil)

B. Referenced Information

REFERENCE	DESIGNATION
TASK 12-13-79-610-010-A	Drain the Engine Oil System
TASK 12-13-79-610-011-A	Check Oil Level and Replenish
TASK 71-00-00-710-045-A	Test No.1 : Dry Motor Leak Check

3. Job Set-up
Subtask 71-00-00-941-102-A ** ON A/C NOT FOR ALL

A. Not Applicable

4. Procedure
Subtask 71-00-00-550-060-A ** ON A/C NOT FOR ALL

A. Do the preservation of the engine main line bearings
(1) Fill the engine oil system with oil (Ref. AMM TASK 12-13-79-610-011).
(2) Dry motor the engine (Ref. AMM TASK 71-00-00-710-045).
(a) Dry motor the engine until there is an indication of a positive oil pressure.
(b) If there is not an oil pressure indication 30 seconds after N2 starts to turn, stop the engine. Do the steps that follow:
1 Make sure that you can see oil in the oil tank sight glass.
2 if the oil level is low, add V10-077lubricant (engine oil) to the oil tank until oil can be seen in the sight glass.
3 Do the dry motor procedure again and look for the oil pressure indication.
(3) Drain the oil system (Ref. AMM TASK 12-13-79-610-010).

5. Close-up
Subtask 71-00-00-942-067-A ** ON A/C NOT FOR ALL

A. Not Applicable

[Rev.10 from 2021] 2026.04.01 02:27:54 UTC