TB 1-1520-238-20-88
(a) Same as paragraph 1.a.
(b) Those aircraft that have a DD250 and are at Boeing will be inspected prior to ferry to final destination.
e. Maintenance Train ers. (Category A, and B). N/A.
f. Component/Parts in Stock Including War Reserves at all Levels (depot and Others). N/A.
2. Task/Inspection Suspense Date. A one-time visual inspection on or before the next 10-hours/14-days, schedule an
eddy current inspection on or before the next phase and perform a recurring eddy current inspection at every phase.
4. Summary of Problem.
a. The fuselage station (FS) 176 frame may develop cracking around the web holes and must be inspected. This frame
was redesigned on aircraft beginning with tail number 85-25351. Aircraft 85-25351 and subsequent do not require this
inspection.
b. For manpower/downtime and funding impacts see paragraph 12.
c. The purpose of this Technical Bulletin is to require inspection of the 176 frame to include: a onetime visual inspection
on or before the next 10-hour/i 4-day interval, a recurring 125 hour visual inspection, schedule a one-time repositioning of
the pitot and static lines and a recurring eddy current inspection on or before the next phase.
5. End Items to be Inspected. AH-64 aircraft, serial numbers 82-23355 thru 84-24311.
Longbow remanufactured
aircraft with fuselage upgrade annotated on the DD250 do not require this inspection.
6. Assembly Components to be inspected. N/A.
7. Parts to be Inspected.
Nomenclature
Part No.
NSN
FS 176 Frame
7-311113180-601
N/A
8. Inspection Procedures. The visual inspection is to be done on or before the next 10-hour/14-day inspection interval.
It will also be repeated as a recurring 50 hour inspection, until the pitot and static lines are relocated and the NDI
inspection has been completed. This inspection will be a 100 hour inspection.
a. Remove inspection panel B200.
b. Drop ammo pack.
c. Using flashlight and 10X magnifier inspect the upper right corner area of the FS 176 frame for cracks. Reference
d. Check frame upper right side around the holes as follows:
2
