(b) Those aircraft that have a DD 250 and are at Boeing Helicopter Company will be
inspected prior to ferry to final destination.
Maintenance Trainers (Category A and B) - Comply no later than 13 Aug 99.
f. Component/Parts in Stock at all Levels (Depot and Others) Including War Reserves - The
statement " H47-QQ-ASAM-02 NOT COMPLIED WITH"will be entered on the serviceability tag of all
g. Components/Parts in Work (Depot Level and Others) - The statement " H-47-99-ASAM-02 NOT
COMPLIED WlTH" will be entered on the serviceability tag of all servo-cylinders listed in paragraph 6 of
2. Task/Inspection Suspense Date.
Comply with paragraph
8 within the next
whichever occurs first.
No later than 9 Mar 99 IAW paragraph 14A of this
3. Reporting Compliance Suspense Date.
Summary of Problem.
The H-47 community has reported several incidents in which the aircraft experienced
uncommanded maneuvers or flight control lock up in flight. The USASC, AMCOM, and Boeing are
conducting an investigation into this hazard. The investigating agencies analyzed suspect components
and performed analytical teardowns. AMCOM issued CH-47-98-ASAM-01 and CH-47-96-ASAM-06 as a
result of the reported incidents. Factors which have been present and may contribute to uncommanded
maneuvers or flight control lock-up include, but are not limited to:
(2) Internal parts out of tolerance.
(3) Corrosion on Internal parts.
(5) Hands off flying,
(6) Internal foreign object damage (FOD) created by wear of aluminum parts.
The investigation team conducted simulations to analyze the interaction of these factors with