AD 2004-20-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | 707 and 720 | Airworthiness Directives; Boeing Model 707 and 720 Series Airplanes |
Unsafe Condition
Stress corrosion cracking of the bolts and wearing of the joint between the lock support fitting and the support link, which could lead to failure of the joint and could cause the collapse of the main landing gear (MLG).
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Required Actions
Inspect the main landing gear (MLG) lock support fitting and the wing fillet flap support link for cracks and corrosion using high frequency eddy current (HFEC) within 12 months or 1,000 flight cycles after the effective date. If any damage is found, rework or replace the components before further flight. Replace the bolts and bushings at the joint between the MLG lock support fitting and the support link with new CRES bolts and Cadmium-plated Al-Ni-Br bushings within the same compliance time.
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Compliance Time
Within 12 months or 1,000 flight cycles after the effective date, whichever comes first.
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Affected Aircraft
All Boeing Model 707 and 720 series airplanes, certificated in any category.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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