SOURCE OF WEAR:

NAVAIR 17-15-50.3

TM 38-301-3

T.O. 33-1-37-3

CGTO 33-1-37-3

ENGINE:TF41-A-2/-2A/-2B/-2C/-400/-402C/402D(NAVY ONLY) (Cont)

AIRCRAFT: (A-7A/-7E/-7F/-7H)(EA-7L, TA-7C

SOURCE OF WEAR:

Main bearing races, rollers, balls, and sleeves. gearbox , No. 2 Bearing and oil pump gears,

gearbox bearings and bearing carries, No.6 bearing oil seal liner, external gearbox , oil pump and

nos. 3, 4 and 5 bearing shafts, (chromium plating under no. 4 bearing inner race is a repair

procedure) and nos. 6 and 7 bearing housing. (chromium plating at split line and under outer race

is a repair procedure.)

Fe & Cr

Main bearing oil seal rings

Internal gearbox, oil pump and no. 2 bearing housing external gearbox air blown seals and

accessories drive pads and scavenge oil pump housing

Main bearing and gearbox cages and oil pump bushings

NOTE

Procedures to be accomplished in order to isolate engine oil pump as cause of high copper content in used

engine oil and preclude engine rejection:

1. Remove and replace engine oil pump. Request engineering investigation of the pump. Flush oil system

in accordance with NAVAIR 02B-5EA-6-1 or NAVAIR 01-45AAE/F-2-4.6. Take oil sample and perform

NOAP trend analysis after each shutdown

2. If NOAP trend analysis indicates all wear metals within limits, engine is considered serviceable; otherwise

recommend reject engine and request engineering investigation

Ag & Cu

No. 3 bearing oil seal and Nos. 4 and 5 bearing oil seal liner and No. 7 Bearing sump

A-66