AD 79-07-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 737-100 Series | BOEING Model 737 Series Airplanes |
| aircraft | The Boeing Company | 737-200 Series | BOEING Model 737 Series Airplanes |
| aircraft | The Boeing Company | 737-200C Series | BOEING Model 737 Series Airplanes |
| aircraft | The Boeing Company | 737-300 Series | BOEING Model 737 Series Airplanes |
| aircraft | The Boeing Company | 737-400 Series | BOEING Model 737 Series Airplanes |
| aircraft | The Boeing Company | 737-500 Series | BOEING Model 737 Series Airplanes |
| aircraft | The Boeing Company | 737-600 Series | BOEING Model 737 Series Airplanes |
| aircraft | The Boeing Company | 737-700 Series | BOEING Model 737 Series Airplanes |
| aircraft | The Boeing Company | 737-800 Series | BOEING Model 737 Series Airplanes |
Unsafe Condition
Failure of thrust lever operated switches S283 and S133 to actuate at temperatures down to and including -65 degrees F could result in loss of engine thrust control indication.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Set thrust lever operated switches S283 and S133 to provide actuation down to and including -65 degrees F following Boeing Service Bulletin 737-31-1026 or equivalent method approved by the FAA.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 2,000 hours time in service or one year after the effective date of this AD, whichever comes first
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Affected Aircraft
Boeing Model 737 series airplanes except those with engine pressure ratio (EPR) activated takeoff warning system
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Thrust Lever Operation
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_79-07-03.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 79-07-03 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: BOEING Model 737 Series Airplanes Subject: Thrust Lever Operation Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 05/04/1979 Make: The Boeing Company Model: 737-100 Series | 737-200 Series | 737-200C Series | 737-300 Series | 737-400 Series | 737-500 Series...Show more 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: 79-07-03 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-3443 AD NUMBER: 79-07-03 SUBJECT HEADING: BOEING Model 737 Series Airplanes ACTION: SUMMARY: DATES: Effective May 4, 1979. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 79-07-03 BOEING: Amendment 39-3443. Applies to all Model 737 series airplanes, except airplanes with the engine pressure ratio (EPR) activated takeoff warning system. Compliance required as indicated. Within 2,000 hours time in service or one year after the effective date of this AD, whichever comes first, unless already accomplished, set the thrust lever operated switches, S283 and S133, to provide actuation down to and including -65 degrees F in accordance with the applicable part of Boeing Service Bulletin 737-31-1026, or later FAA approved revisions, or an equivalent method approved by the Chief, Engineering and Manufacturing Branch, FAA, Northwest Region. The manufacturer's specifications and procedures identified and described in this directive are incorporated herein and made a part hereof pursuant to 5 U.S.C. 552(a)(1). All persons affected by this directive who have not already received these documents from the manufacturer may obtain copies upon request to Boeing Commercial Airplane Company, P.O. Box 3707, Seattle, Washington 98124. These documents may also be examined at FAA, Northwest Region, 9010 East Marginal Way South, Seattle, Washington 98108. This amendment becomes effective May 4, 1979. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_79-07-03.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 79-07-03 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: BOEING Model 737 Series Airplanes Subject: Thrust Lever Operation Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 05/04/1979 Make: The Boeing Company Model: 737-100 Series | 737-200 Series | 737-200C Series | 737-300 Series | 737-400 Series | 737-500 Series...Show more 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: 79-07-03 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-3443 AD NUMBER: 79-07-03 SUBJECT HEADING: BOEING Model 737 Series Airplanes ACTION: SUMMARY: DATES: Effective May 4, 1979. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 79-07-03 BOEING: Amendment 39-3443. Applies to all Model 737 series airplanes, except airplanes with the engine pressure ratio (EPR) activated takeoff warning system. Compliance required as indicated. Within 2,000 hours time in service or one year after the effective date of this AD, whichever comes first, unless already accomplished, set the thrust lever operated switches, S283 and S133, to provide actuation down to and including -65 degrees F in accordance with the applicable part of Boeing Service Bulletin 737-31-1026, or later FAA approved revisions, or an equivalent method approved by the Chief, Engineering and Manufacturing Branch, FAA, Northwest Region. The manufacturer's specifications and procedures identified and described in this directive are incorporated herein and made a part hereof pursuant to 5 U.S.C. 552(a)(1). All persons affected by this directive who have not already received these documents from the manufacturer may obtain copies upon request to Boeing Commercial Airplane Company, P.O. Box 3707, Seattle, Washington 98124. These documents may also be examined at FAA, Northwest Region, 9010 East Marginal Way South, Seattle, Washington 98108. This amendment becomes effective May 4, 1979. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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