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.
AI-generated summary from the source AD text. Verify against the official source before acting.
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.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 18 months from the effective date of this AD (May 10, 1989).
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
BOEING Model 737-100 and 737-200 series airplanes certificated in any category without nose gear compression logic for thrust reverser enablement.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Thrust Reverser
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_89-08-08.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 89-08-08 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; BOEING Model 737-100 and 737-200 Series Airplanes Subject: Thrust Reverser Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 05/10/1989 Make: The Boeing Company Model: 737-100 Series | 737-200 Series Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 89-08-08 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-6191 AD NUMBER: 89-08-08 SUBJECT HEADING: Airworthiness Directives; BOEING Model 737-100 and 737-200 Series Airplanes ACTION: SUMMARY: DATES: Effective May 10, 1989. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 89-08-08 BOEING: Amendment 39-6191. Applicability: Model 737-100 and 737-200 series airplanes, certificated in any category, which presently do not use nose gear compression logic to enable thrust reversers. Compliance: Required as indicated, unless previously accomplished. To ensure timely deployment of reverse thrust when landing under adverse weather and runway conditions, accomplish the following: A. Within 18 months from the effective date of this AD, install an FAA-approved modification to the Air/Ground Sensing System which causes the thrust reverser logic to be enabled by nose gear strut compression in addition to the present logic of the right main gear oleo compression. B. An alternate means of compliance or adjustment of the compliance time, which provides an acceptable level of safety, may be used when approved by the Manager, Seattle Aircraft Certification Office, FAA, Northwest Mountain Region. NOTE: The request should be forwarded through an FAA Principal Maintenance Inspector (PMI), who may add any comments and then send it to the Manager, Seattle Aircraft Certification Office. C. Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base for the accomplishment of the modification required by this AD. This amendment (39-6191, AD 89-08-08) becomes effective on May 10, 1989. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_89-08-08.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 89-08-08 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; BOEING Model 737-100 and 737-200 Series Airplanes Subject: Thrust Reverser Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 05/10/1989 Make: The Boeing Company Model: 737-100 Series | 737-200 Series Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 89-08-08 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-6191 AD NUMBER: 89-08-08 SUBJECT HEADING: Airworthiness Directives; BOEING Model 737-100 and 737-200 Series Airplanes ACTION: SUMMARY: DATES: Effective May 10, 1989. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 89-08-08 BOEING: Amendment 39-6191. Applicability: Model 737-100 and 737-200 series airplanes, certificated in any category, which presently do not use nose gear compression logic to enable thrust reversers. Compliance: Required as indicated, unless previously accomplished. To ensure timely deployment of reverse thrust when landing under adverse weather and runway conditions, accomplish the following: A. Within 18 months from the effective date of this AD, install an FAA-approved modification to the Air/Ground Sensing System which causes the thrust reverser logic to be enabled by nose gear strut compression in addition to the present logic of the right main gear oleo compression. B. An alternate means of compliance or adjustment of the compliance time, which provides an acceptable level of safety, may be used when approved by the Manager, Seattle Aircraft Certification Office, FAA, Northwest Mountain Region. NOTE: The request should be forwarded through an FAA Principal Maintenance Inspector (PMI), who may add any comments and then send it to the Manager, Seattle Aircraft Certification Office. C. Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base for the accomplishment of the modification required by this AD. This amendment (39-6191, AD 89-08-08) becomes effective on May 10, 1989. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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