AD 71-20-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus SAS | BAC 1-11 200 Series | Airworthiness Directives; BRITISH AIRCRAFT CORPORATION Model BAC 1-11 200 and 400 Series Airplanes |
| aircraft | Airbus SAS | BAC 1-11 400 Series | Airworthiness Directives; BRITISH AIRCRAFT CORPORATION Model BAC 1-11 200 and 400 Series Airplanes |
Unsafe Condition
Failure of the landing gear selector lever switch to warn the pilot when the lever is not fully engaged in a gated position could result in unintended gear retraction or extension.
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Required Actions
Modify the landing gear selector lever assembly by incorporating a microswitch wired into the existing landing gear indication circuit in accordance with British Aircraft Corporation Service Bulletin No. 32-PM 4538 or an FAA-approved equivalent.
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Compliance Time
within the next 2,000 hours' time in service after the effective date of this AD
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Affected Aircraft
British Aircraft Corporation Model BAC 1-11 200 and 400 Series airplanes
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Federal Register Abstract
Landing Gear Selector Lever Switch
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_71-20-07.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 71-20-07 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; BRITISH AIRCRAFT CORPORATION Model BAC 1-11 200 and 400 Series Airplanes Subject: Landing Gear Selector Lever Switch Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 10/22/1971 Make: Airbus SAS Model: BAC 1-11 200 Series | BAC 1-11 400 Series Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 71-20-07 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-1298 AD NUMBER: 71-20-07 SUBJECT HEADING: Airworthiness Directives; BRITISH AIRCRAFT CORPORATION Model BAC 1-11 200 and 400 Series Airplanes ACTION: SUMMARY: DATES: Effective October 22, 1971. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 71-20-07 BRITISH AIRCRAFT CORPORATION: Amendment 39-1298. Applies to British Aircraft Corporation Model BAC 1-11 200 and 400 series airplanes. Compliance is required within the next 2,000 hours' time in service after the effective date of this AD, unless already accomplished. To ensure that the pilot is warned when the landing gear selector lever is not fully engaged in a gated position, modify the selector lever assembly by incorporating a microswitch wired into the existing landing gear indication circuit in accordance with British Aircraft Corporation Model BAC 1-11 Service Bulletin No. 32-PM 4538, dated July 6, 1970, or an FAA- approved equivalent. This amendment becomes effective October 22, 1971. FOOTER:
Document Text
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AD Final Rules - DRS_71-20-07.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 71-20-07 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; BRITISH AIRCRAFT CORPORATION Model BAC 1-11 200 and 400 Series Airplanes Subject: Landing Gear Selector Lever Switch Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 10/22/1971 Make: Airbus SAS Model: BAC 1-11 200 Series | BAC 1-11 400 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: 71-20-07 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-1298 AD NUMBER: 71-20-07 SUBJECT HEADING: Airworthiness Directives; BRITISH AIRCRAFT CORPORATION Model BAC 1-11 200 and 400 Series Airplanes ACTION: SUMMARY: DATES: Effective October 22, 1971. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 71-20-07 BRITISH AIRCRAFT CORPORATION: Amendment 39-1298. Applies to British Aircraft Corporation Model BAC 1-11 200 and 400 series airplanes. Compliance is required within the next 2,000 hours' time in service after the effective date of this AD, unless already accomplished. To ensure that the pilot is warned when the landing gear selector lever is not fully engaged in a gated position, modify the selector lever assembly by incorporating a microswitch wired into the existing landing gear indication circuit in accordance with British Aircraft Corporation Model BAC 1-11 Service Bulletin No. 32-PM 4538, dated July 6, 1970, or an FAA- approved equivalent. This amendment becomes effective October 22, 1971. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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