TM 1-1520-238-23
1-402.2
Change 10
1.137.
SPECIAL INSPECTION CHECKLIST – continued
Helicopter Serial No.:
Date:
Area
No.
REQUIREMENT
EVERY
Item
Status
Special
Inspection
No.
2
40
MONTHLY
a. Spray corrosion preventive compound (item 64, App F) or equivalent into
the air outlet of the fuel boost pump.
4
41
50 FLIGHT HOURS
TAILBOOM FRAME ASSEMBLY INSPECTION (FS 530 and FS 547)
NOTE
If cracks or workings rivets are confirmed during the following inspection,
report defects immediately to local Apache LAR and U. S. Army Aviation
and Missile Command (AMCOM), AMSAM-AR-EI-P-A (AH-64), DSN
897-4925 or Commercial 265-313-4925 DATA FAX is DSN 897-1874.
Further flight is authorized only following incorporation of AMCOM ap-
proved repairs as directed by AMCOM Engineering. If cracks are found,
submit a CAT I DR.
If cracks are suspected, perform nondestructive inspection (TM 1-1520-264-23).
a. Remove fairings L545 and R545 (para 2.2).
b. Check the forward face of the FS 530 and FS 547 frame assemblies for
cracks and/or working rivets.
(1) Cracks found in the FS 530 frame initiating at the upper corners of
the square central cutout will require visual inspection from the
forward side at 10 HOUR/14 DAY intervals until the frame is replaced.
Any of these cracks which propagate beyond the vertical stabilizer
attachment assembly (7-311114160-11) must be reported and
repaired per AMCOM approved repairs.
(2) Cracks found in the FS 530 frame initiating at the lower corners of the
square central cutout that are no longer than 1.0 INCH will require
daily visual inspection from the forward side until the approved
repairs are accomplished. The cracks will be stop-drilled without
affecting any structural members. The repair should be performed no
later than the next scheduled phase inspection. After the repairs are
accomplished, inspect at 10 HOUR/14 DAY intervals until the frame is
replaced.
(3) Cracks found in the FS 547 frame no longer than 1.5 INCHES at the
2L stringer attachment pocket (running at a 90 angle to the
centerline of the stringer) will be inspected daily. Cracks at any other
location or outside the above limits of the FS 547 frame require
replacement per AMCOM approved repairs.
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