TM 1-1520-238-23
5-240
Change 2
5.53.
TAIL ROTOR BLADE REMOVAL – continued
5.53.5. Inspection
a. Check hub for nicks, scratches, and gouges (para 5.51).
b. Check removed and attaching parts for cracks. None allowed.
c. Check hub, pitch control link, pitch horn, electrical lead, and blade for corrosion (para 1.49).
d. Check blade (para 5.51 and 5.52).
e. Check entire blade for bonding separation.
(1) A white line along the aft edge of spar 1 (3.6 inches aft of leading edge) or spar 2 (6.5 inches aft of leading
edge) may be a symptom of debond.
(2) Tap on blade with edge of a coin held between thumb and forefinger. A bonded spot will have a sharp ring.
An unbonded spot will have a dull or rattling sound.
f. Check strap pack for corrosion (para 1.49).
g. Check pitch link (para 11.232).
h. Check blade attach bolts and bushings for wear.
(1) Blade attach bolt 0.5600 INCH minimum diameter.
(2) Bushing inside diameter 0.5635 INCH maximum diameter.
(3) Bushing outside diameter 0.9340 INCH minimum diameter. Bushing liner not to wear through.
(4) Blade root fitting 0.9385 INCH maximum diameter.
i. Check electrical lead for broken wires and missing terminal end. None allowed.
END OF TASK
