TM 55-2840-254-23
1-80 INSPECT ENGINE AFTER N2 OVERSPEED (AVIM)
Personnel Required:
INITIAL SETUP
Applicable Configurations:
All
References:
TM 55-1520-240-10
Tools:
Task 8-23
Powerplant Mechanic's Tool Kit,
Task 8-27
Task 8-28
Technical Inspection Tool Kit,
Task 8-35
Task 4-36
Task 8-88
Task 4-78
Task 8-94
Materials:
Task 4-82
None
NOTE
An engine overspeed exists under the con-
ditions described in Operating Instructions,
TM 55-1520-240-10 or Engine Test (Ref.
1. If N2 overspeed limits are exceeded, proceed as
follows:
a. Remove oil filter cap and stem assembly and
metal chips or other foreign material.
b. Install oil filter element and oil filter cap and
stem assembly (Ref. Task 8-27).
c. Remove chip detector (Ref. Task 8-88), and
check for metal chips.
d. Install chip detector (Ref. Task 8-94).
e. Remove dual chip detectors (Ref. Task 8-28),
and check for metal chips.
f. Install dual chip detectors (Ref. Task 8-35).
g. If chips are found in oil filter, chip detector,
or dual chip detector, inspect contaminated
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