AD 77-15-15
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus SAS | BAC 1-11 200 Series | Airworthiness Directives; BRITISH AIRCRAFT CORPORATION Models BAC 1- 11 200 and 400 Series Airplanes |
| aircraft | Airbus SAS | BAC 1-11 400 Series | Airworthiness Directives; BRITISH AIRCRAFT CORPORATION Models BAC 1- 11 200 and 400 Series Airplanes |
Unsafe Condition
Failure of the light alloy stop (P/N AB55-2301) on the cabin pressure discharge valve manual control could cause inadvertent loss of cabin pressure.
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Required Actions
Replace the light alloy stop P/N AB55-2301 with improved strength stop P/N AB55-3433 or FAA-approved equivalent on the gear wheel and drum assembly of the air conditioning discharge valve manual control (P/N AB55A-2425 or ED55A779).
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Compliance Time
within the next 200 hours time in service after the effective date of this AD
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Affected Aircraft
BRITISH AIRCRAFT CORPORATION Models BAC 1-11 200 and 400 Series airplanes, certificated in all categories
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Federal Register Abstract
Cabin pressure
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_77-15-15.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 77-15-15 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; BRITISH AIRCRAFT CORPORATION Models BAC 1- 11 200 and 400 Series Airplanes Subject: Cabin pressure Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 08/29/1977 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Model: BAC 1-11 200 Series | BAC 1-11 400 Series Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 77-15-15 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2986 AD NUMBER: 77-15-15 SUBJECT HEADING: Airworthiness Directives; BRITISH AIRCRAFT CORPORATION Models BAC 1- 11 200 and 400 Series Airplanes ACTION: SUMMARY: DATES: Effective August 29, 1977. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 77-15-15 BRITISH AIRCRAFT CORPORATION: Amendment 39-2986. Applies to BAC 1- 11 200 and 400 series airplanes, certificated in all categories. Compliance is required within the next 200 hours time in service after the effective date of this AD, unless already accomplished. To prevent the inadvertent loss of cabin pressure due to failure of the light alloy stop on the cabin pressure discharge valve manual control, replace the light alloy stop, P/N AB55-2301, on the gear wheel and drum assembly of the air conditioning discharge valve manual control (P/N AB55A-2425 or ED55A779) with an improved strength stop, P/N AB55-3433, or an FAA-approved equivalent. (British Aircraft Corporation Service Bulletin No. 21-PM 5139, Revision 2, dated September 5, 1973, applies to this same subject.) This amendment becomes effective August 29, 1977. FOOTER:
Document Text
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AD Final Rules - DRS_77-15-15.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 77-15-15 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; BRITISH AIRCRAFT CORPORATION Models BAC 1- 11 200 and 400 Series Airplanes Subject: Cabin pressure Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 08/29/1977 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: 77-15-15 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2986 AD NUMBER: 77-15-15 SUBJECT HEADING: Airworthiness Directives; BRITISH AIRCRAFT CORPORATION Models BAC 1- 11 200 and 400 Series Airplanes ACTION: SUMMARY: DATES: Effective August 29, 1977. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 77-15-15 BRITISH AIRCRAFT CORPORATION: Amendment 39-2986. Applies to BAC 1- 11 200 and 400 series airplanes, certificated in all categories. Compliance is required within the next 200 hours time in service after the effective date of this AD, unless already accomplished. To prevent the inadvertent loss of cabin pressure due to failure of the light alloy stop on the cabin pressure discharge valve manual control, replace the light alloy stop, P/N AB55-2301, on the gear wheel and drum assembly of the air conditioning discharge valve manual control (P/N AB55A-2425 or ED55A779) with an improved strength stop, P/N AB55-3433, or an FAA-approved equivalent. (British Aircraft Corporation Service Bulletin No. 21-PM 5139, Revision 2, dated September 5, 1973, applies to this same subject.) This amendment becomes effective August 29, 1977. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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