TM 1-1520-238-23
1-388
Change 11
1.137.
SPECIAL INSPECTION CHECKLIST – continued
Helicopter Serial No.:
Date:
Area
No.
REQUIREMENT
EVERY
Item
Status
Special
Inspection
No.
6
27
(cont)
CRITERIA FOR REPLACEMENT
(cont)
a. If one laminate, other than a previously trimmed top or bottom laminate is
discrepant, strap pack assembly is unserviceable, but a one time flight to
an adequate AH-64 maintenance facility is authorized. This flight shall not
exceed two hours.
b. If two laminates, other than a previously trimmed top or bottom laminate
are discrepant, strap pack assembly is unserviceable and no flights are
authorized.
6
27A
20 FLIGHT HOURS
PERFORM MAIN ROTOR STRAP PACK BORESCOPE INSPECTION:
NOTE
This inspection to be done in conjunction with special inspection #27.
a. Perform borescope inspection (para 5.34A).
5
27B
10 FLIGHT HOURS
CHECK ENCU FILTER FOR CONTAMINATION:
a. Clean ENCU filter element (para 13.12).
28
10 HOURS/14 DAY
If cracks are suspected, perform nondestructive inspection (TM 1-1520-264-23).
On PN 7-311310001-5, -7, -13, -15, -21, and -25 main transmission, accomplish
the following:
a. Remove access panels L200 and R200.
b. Open access doors T250L, T250R, T290L, T290R, and L325.
c. Thoroughly clean exteriors of main transmission cover and intermediate
support.
d. Check intermediate gear support left and right side gear covers (ears) and
flange bolt hole bosses and webs for evidence of cracks or oil leakage.
Use 5-power magnifier.
e. If cracks are suspected, perform nondestructive inspection
(TM 1-1520-264-23).
f. Secure access doors T250L, T250R, T290L, T290R, and L325.
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