Sat, Aug 07, 2004
Wheel Attachment 10/2004 DM
Applicability: Group A
Models Serial Numbers
Group B aircraft:
Requirement: 1. For aircraft listed in Group A
of the applicability part of this Directive, with the exception of
aircraft listed in Group A that are already modified in accordance
with the New Piper Aircraft Service Bulletin (SB) No. 1139, dated
28 August 2003; accomplish the following in accordance with Part I
of SB No.1139 dated 9 April 2004:
a. Inspect the control wheel attachment screw for proper thread
(minimum one thread showing past the end of the nut plate), and
screw before further flight if insufficient thread engagement is
b. Inspect the nut plate for sufficient locking characteristics.
If the screw can
be fully inserted into the nut plate by hand (one thread showing
past end of
nut), then replacement of the nut plate is required before further
c. Reassemble the control wheel onto the control wheel shaft and
attachment screw using Loctite thread-locking compound.
2. For aircraft listed in Group A or Group B of the
applicability part of this Directive, install retainer clip part
number 104687-002 in accordance with Part II of SB No. 1139A, dated
9 April 2004.
Note: FAA AD 2004-14-12 Amdt 39-13721
- Within 25 hours time in service after 11 August 2004.
- Within 100 hours time in service after 11 August 2004.
This Airworthiness Directive becomes effective on 11 August
Background: The FAA received a report that a
Model PA-28-181 aircraft crashed after the pilot lost control of
the ailerons and elevator. Investigation revealed that the left
control wheel single attachment screw had unscrewed from its nut
plate, which resulted in the control wheel spinning freely on the
control column. Further investigation revealed the screw was too
short and the nut plate lacked proper locking characteristics.
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