AD NUMBER: 2008-08-10
MANUFACTURER: Boeing
SUBJECT: Airworthiness Directive 2008-08-10
SUMMARY: We are adopting a new airworthiness directive
(AD) for all Boeing Model 737-100, -200, -200C,-300, -400, and -500
series airplanes. For certain airplanes, this AD requires replacing
the outboard stabilizing fitting and certain adjacent components of
the main landing gear (MLG)support beam. This AD also requires
repetitive inspections for discrepancies of the outboard
stabilizing fitting, walking beam hanger, and rear spar attachment,
and corrective actions if necessary. For certain airplanes, this AD
provides an alternative one-time inspection of the outboard
stabilizing fitting for discrepancies, and corrective actions if
necessary, which would extend the compliance time for the
replacement of the outboard stabilizing fitting. For certain other
airplanes, this AD also requires performing a torque check of the
aft pin of the outboard stabilizing fitting, and corrective actions
if necessary. This AD results from reports of findings of fatigue
cracking of the outboard stabilizing fitting and stress corrosion
cracking of the bolts attaching the fitting to the wing rear spar.
We are issuing this AD to detect and correct that cracking, which
could result in disconnection of the MLG actuator from the rear
spar and support beam, consequent damage to the hydraulic system,
and possible loss of the 'A' and 'B' hydraulic systems and
damage or jamming of the flight control cables. Damage or jamming
of the flight control cables could result in loss of control of the
airplane.
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