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NO. 5 TAIL ROTOR DRIVE SHAFT, DAMPER, AND ANTI-FLAIL SUPPORT REMOVAL/INSTALLATION – continued | Up
TM-1-1520-238-23-4 Helicopter Attack AH-64A Apache (NSN 1520-01-106-9519) (EIC: RHA) Manual | Next
NO. 5 TAIL ROTOR DRIVE SHAFT, DAMPER, AND ANTI-FLAIL SUPPORT REMOVAL/INSTALLATION – continued |
TM 1-1520-238-23
6-61
6.11.
NO. 5 TAIL ROTOR DRIVE SHAFT, DAMPER, AND ANTI-FLAIL SUPPORT
REMOVAL/INSTALLATION – continued
NOTE
Unless otherwise specified, the following inspection procedures apply to both damper and anti-flail
support.
i. Check for nicks, dents, or scratches (para 6.1).
j. Check for loose or missing rivets (para 6.1).
k. Check damper support for cracks.
(1) Cracks or tears more than 25 percent of shortest dimension are not acceptable.
(2) Cracks on holes more than 3.0 INCHES diameter with cleanup more than 2.0 INCHES from supporting
structure, and affecting more than 5 percent of skin area are not acceptable.
l. Check anti-flail support for cracks.
(1) Check anti-flail support sleeve for cracks. None allowed. Replace sleeve (para 6.8.7).
(2) Check anti-flail support doublers for cracks. None allowed. Replace doubler (para 6.8.7).
(3) Check anti-flail support brackets for cracks. None allowed. Replace bracket(s) (para 6.8.7).
m. Check for cracks elsewhere on damper and anti-flail support.
(1) Refer to paragraph 6.8.7 to determine if location and/or size of crack is acceptable, and appropriate repair
procedures.
n. Check anti-flail support sleeves for other evidence of damage. Replace sleeve (para 6.8.7).
o. Check anti-flail support doublers for debonding and elongated bolt holes. Replace doubler (para 6.8.7).
NOTE
The following inspection procedures apply to the intermediate gearbox coupling.
p. Check for cracks (para 6.1).
q. Check for nicks and scratches (para 6.1).
r. Check for erosion of aluminum bronze coating (para 6.1).
s. Check for elongated bolt holes and clogged vent holes (para 6.1).
t. Check for dents in diaphragm and deep bends in diaphragm guard (para 6.1).
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