AD 99-03-04

final rule
Data completeness: 70%

Airworthiness Directives; BOEING Model 737-100, -200, -300, -400, and -500 Series Airplanes

AD Number
99-03-04
Status
final_rule
Effective Date
Product Category
aircraft
Docket
98-NM-50-AD
FR Citation
(Federal Register: February 02, 1999 (Volume 64, Number 21))

Applicability

TypeManufacturerModelDetails
aircraft The Boeing Company 737-100 Series Airworthiness Directives; BOEING Model 737-100, -200, -300, -400, and -500 Series Airplanes
aircraft The Boeing Company 737-200 Series Airworthiness Directives; BOEING Model 737-100, -200, -300, -400, and -500 Series Airplanes
aircraft The Boeing Company 737-300 Series Airworthiness Directives; BOEING Model 737-100, -200, -300, -400, and -500 Series Airplanes
aircraft The Boeing Company 737-400 Series Airworthiness Directives; BOEING Model 737-100, -200, -300, -400, and -500 Series Airplanes
aircraft The Boeing Company 737-500 Series Airworthiness Directives; BOEING Model 737-100, -200, -300, -400, and -500 Series Airplanes

Unsafe Condition

The fuel system wiring routed to the fuel tanks may have damaged insulation, exposed conductors, or conductive debris, which combined with electromagnetic interference (EMI) transients or hot shorts, could generate sufficient energy to ignite fuel vapors in the fuel tanks. Additionally, external ignition of fuel vapor exiting the fuel vent system could propagate a flame front into the tanks.

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Required Actions

Install shielding and separation components for fuel system wiring routed to fuel tanks, install flame arrestors and pressure relief valves in the fuel vent system.

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Compliance Time

before further flight

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Affected Aircraft

Boeing Model 737-100, -200, -300, -400, and -500 series airplanes, all serial numbers.

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

Source: Official FAA Source ↗

Retrieved: Apr 8, 2026

Rights: U.S. Government Public Domain

This site is not affiliated with or endorsed by the FAA. Always verify with official sources.

View Official Source ↗ Find More ADs for The Boeing Company 737-100 Series

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