1-80 lNSPECT ENGINE AFTER N2 OVERSPEED (AVIM) (Continued)
h. Remove exit vane assembly (Ref. Task 4-78).
(1) Visually inspect fourth stage power tur-
bine rotor for damaged or missing blades.
(2) Perform tip clearance check on fourth
stage power turbine rotor blades (Ref.
Task 4-36, step 17).
(3) If discrepancies are not noted in preced-
ing steps h. (1) and h. (2), install exit
vane assembly (Ref. Task 4-82) and go
to step j.
i. If discrepancies are noted in preceding step h.,
j. Determine and correct cause of Overspeed
k. Perform initial check run (Ref. TM 55-1520-
are noted, engine is serviceable.
END OF TASK