TM 1-1520-238-23
Change 2
5-162.3
5.34A.
MAIN ROTOR STRAP PACK BORESCOPE INSPECTION – continued
(5) Secure flexible borescope tube to Dekoron
guide tube at transition band with tape. Use
tape (item 208, App F).
(6) Insert tube (1) into pitch housing (2) from in-
board end straightening guide tube as it is
inserted.
(7) Using borescope articulation control (3), posi-
tion tip so lens is viewing leading edge of
leading leg a minimum of 1/2 INCH outboard
of centerline of outboard bolt hole and lock
articulation in place.
(8) Adjust focus control (4) until a clear image of
strap pack (5) edge is obtained.
(9) Carefully view along leading edge of strap
pack (5) by moving guide tube inboard until a
viewing point is reached approximately 1/2
INCH inboard of centerline of inboard nut.
Some adjustment in articulation angle may be
required.
NOTE
If borescope inspection becomes awk-
ward in inboard leg region, a 10 power
magnifying glass used in conjunction with
an adequate light source may be substi-
tuted.
(10) Inspect strap pack (5) in accordance with
special inspection No. 27, paragraph 1.137.
(11) Note any cracked/broken laminates.
(12) Move tube (1) to lagging edge of lag leg of
strap and repeat steps (7) through (11).
(13) Remove tube (1) from pitch housing (2).
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M04-5135-4
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