AD 89-08-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 737-100 Series | Airworthiness Directives; BOEING Model 737-100 and 737-200 Series Airplanes |
| aircraft | The Boeing Company | 737-200 Series | Airworthiness Directives; BOEING Model 737-100 and 737-200 Series Airplanes |
Unsafe Condition
Failure of the thrust reverser logic to enable due to reliance solely on right main gear oleo compression, which may delay reverse thrust deployment during landing under adverse conditions.
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Required Actions
Install an FAA-approved modification to the Air/Ground Sensing System enabling thrust reverser logic via nose gear strut compression in addition to right main gear oleo compression. An alternate means of compliance or adjusted time may be approved by the Manager, Seattle Aircraft Certification Office.
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Compliance Time
Within 18 months from the effective date of this AD (May 10, 1989).
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Affected Aircraft
BOEING Model 737-100 and 737-200 series airplanes certificated in any category without nose gear compression logic for thrust reverser enablement.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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