AD 90-20-22

final rule
Data completeness: 70%

Airworthiness Directives; BOEING Model 737 Series Airplanes

AD Number
90-20-22
Status
final_rule
Effective Date
Product Category
aircraft
Docket
90-NM-44-AD
FR Citation
This information is not available.

Applicability

TypeManufacturerModelDetails
aircraft The Boeing Company 737-100 Series Airworthiness Directives; BOEING Model 737 Series Airplanes
aircraft The Boeing Company 737-200 Series Airworthiness Directives; BOEING Model 737 Series Airplanes
aircraft The Boeing Company 737-200C Series Airworthiness Directives; BOEING Model 737 Series Airplanes
aircraft The Boeing Company 737-300 Series Airworthiness Directives; BOEING Model 737 Series Airplanes
aircraft The Boeing Company 737-400 Series Airworthiness Directives; BOEING Model 737 Series Airplanes
aircraft The Boeing Company 737-500 Series Airworthiness Directives; BOEING Model 737 Series Airplanes
aircraft The Boeing Company 737-600 Series Airworthiness Directives; BOEING Model 737 Series Airplanes
aircraft The Boeing Company 737-700 Series Airworthiness Directives; BOEING Model 737 Series Airplanes
aircraft The Boeing Company 737-800 Series Airworthiness Directives; BOEING Model 737 Series Airplanes

Unsafe Condition

Fuel vapor leaks into the inboard fixed leading edge landing light cavities could result in fuel vapor ignition.

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

Required Actions

Inspect wings' inboard leading edge landing and runway turn-off/taxi light cavities for improper fuel vapor barrier sealing within 180 days after the effective date. If sealing is improperly applied, rework the vapor barrier sealing prior to further flight. Submit a report within 10 days after inspection if discrepancies are found.

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

Compliance Time

Within the next 180 days after the effective date of this AD, and rework prior to further flight if needed.

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

Affected Aircraft

Boeing Model 737 series airplanes listed in Alert Service Bulletin 737-57A1197 dated December 21, 1989.

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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