TM 1-1520-238-23
6-175
6.36.
ENGINE NOSE GEARBOX AND QUILL SHAFT REMOVAL/INSTALLATION – continued
m. Remove three fairing standoffs (26), (27), and
(28) from gearbox (19).
(1) Remove four screws (29), washers (30), two
fairing standoffs (26), and shims (31).
(2) Remove two screws (32), washers (33),
standoff (27), and shim (34).
(3) Remove screw (35), washer (36), standoff
(28), and shim (37).
n. Remove engine nose gearbox flexible cou-
pling, diffuser, and fan impeller (para 6.33).
o. Attach quill shaft (23) to gearbox (19) for dis-
position.
6.36.4. Cleaning
a. Clean removed and attaching parts or sur-
faces (para 1.47).
6.36.5. Inspection
a. Check gearbox retainer for cracks, gouges,
and evidence of leaks.
b. Check coupling for nicks, dents, cracks, and
elongated holes (para 6.1).
c. Check transmission input shaft for nicks,
dents, cracks, and loose or missing nut
plates. None allowed.
d. Check diffuser, fan impeller and adapter for
cracks, dents, and loose or missing bolts.
(1) Foreign object damage not to exceed 15 per-
cent of material thickness or 0.050 INCH
(whichever is less).
e. Check coupling, input shaft, fan impeller, and
adapter for corrosion (para 1.49).
f. Check quill shaft for serviceability (para 6.17).
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28
33
26
30
31
29
30
26
31
36
35
37
32
27
34
M04-547-6
29
19
