AD 2005-04-01

Recurring final rule
Data completeness: 70%

Airworthiness Directives; Boeing Model 707-100, -100B, -300, -300B (Including -320B Variant), -300C, and -E3A (Military) Series Airplanes; Model 720 and 720B Series Airplanes; Model 737-100, -200, -200C, -300, -400, and -500 Series Airplanes; and Model 747 Airplanes

AD Number
2005-04-01
Status
final_rule
Effective Date
Product Category
engine
Docket
Docket No. FAA-2004-18759
FR Citation
70 FR 7841

Applicability

TypeManufacturerModelDetails
aircraft Boeing 707-100 Airworthiness Directives; Boeing Model 707-100, -100B, -300, -300B (Including -320B Variant), -300C, and -E3A (Military) Series Airplanes; Model 720 and 720B Series Airplanes; Model 737-100, -200, -200C, -300, -400, and -500 Series Airplanes; and Model 747 Airplanes

Unsafe Condition

Potential for arcing or sparking at the interface between the bulkhead fittings of the engine fuel feed tube and the front spar inside the fuel tank of the wings, and between the overwing fuel fill ports and the airplane structure during a lightning strike, which could provide a possible ignition source for fuel vapor inside the fuel tank and cause fuel tank explosions.

AI-generated summary from the source AD text. Verify against the official source before acting.

Required Actions

Conduct repetitive tests of the overwing fuel fill ports for certain wing tanks; perform an electrical bonding resistance test between the bulkhead fittings of the engine fuel feed tube and the front spar inside the fuel tank of the wings; take other specified actions; and perform applicable corrective actions if necessary.

AI-generated summary from the source AD text. Verify against the official source before acting.

Compliance Time

Within 5 years after the effective date of the AD.

AI-generated summary from the source AD text. Verify against the official source before acting.

Affected Aircraft

Boeing Model 707-100, -100B, -300, -300B (including -320B variant), -300C, and -E3A (military) series airplanes; Model 720 and 720B series airplanes; Model 737-100, -200, -200C, -300, -400, and -500 series airplanes; and Model 747 airplanes.

AI-generated summary from the source AD text. Verify against the official source before acting.

Source: Official FAA Source ↗

Retrieved: Apr 6, 2026

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