AD 77-14-12
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
Leaks in the ring main ducts of the passenger oxygen system due to chafing or insufficient clearance with adjacent structure less than 0.050 inches.
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Required Actions
Inspect passenger oxygen ring main ducts per BAC Alert Service Bulletin 35-A-PM 5124. Address chafing or insufficient clearance by complying with specified provisions of the bulletin. Install an FAA-approved placard if system restrictions occur.
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Compliance Time
within the next 500 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, certificated in all categories
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Federal Register Abstract
Passenger Oxygen System
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_77-14-12.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 77-14-12 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: Passenger Oxygen System Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 08/15/1977 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Model: BAC 1-11 200 Series | BAC 1-11 400 Series Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 77-14-12 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2967 AD NUMBER: 77-14-12 SUBJECT HEADING: Airworthiness Directives; BRITISH AIRCRAFT CORPORATION Model BAC 1-11, 200 and 400 Series Airplanes ACTION: SUMMARY: DATES: Effective August 15, 1977. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 77-14-12 BRITISH AIRCRAFT CORPORATION: Amendment 39-2967. Applies to Model BAC 1-11, 200 and 400 series airplanes, certificated in all categories. Compliance is required within the next 500 hours time in service after the effective date of this AD, unless already accomplished. To prevent possible leaks in the ring main ducts of the passenger oxygen system, accomplish the following: (a) Gain access to and conduct a one-time inspection of the passenger oxygen ring main ducts in accordance with paragraph 2.1.1. of the "Accomplishment Instructions" of British Aircraft Corporation Alert Service Bulletin 35-A-PM 5124, Issue No. 1, dated February 12, 1973, or an FAA-approved equivalent. (b) If during the inspection required by paragraph (a) of this AD, chafing of any of the oxygen ducts is found or the clearance with adjacent structure is less than 0.050 inches, comply with the applicable provisions specified in paragraph 2.1.2, 2.1.3, 2.1.4, or 2.1.5 of BAC Alert Service Bulletin 35-A-PM 5124, dated February 12, 1973, or an FAA-approved equivalent. (c) If, as a result of any of the actions required by paragraph (b) of this AD, the use of the passenger oxygen system is restricted, install an FAA-approved placard in full view of the pilot which defines the restriction and states that flight operations must be limited to those allowed by the applicable operating rules for the particular airplane. This amendment becomes effective August 15, 1977. FOOTER:
Document Text
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AD Final Rules - DRS_77-14-12.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 77-14-12 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: Passenger Oxygen System Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 08/15/1977 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: 77-14-12 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2967 AD NUMBER: 77-14-12 SUBJECT HEADING: Airworthiness Directives; BRITISH AIRCRAFT CORPORATION Model BAC 1-11, 200 and 400 Series Airplanes ACTION: SUMMARY: DATES: Effective August 15, 1977. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 77-14-12 BRITISH AIRCRAFT CORPORATION: Amendment 39-2967. Applies to Model BAC 1-11, 200 and 400 series airplanes, certificated in all categories. Compliance is required within the next 500 hours time in service after the effective date of this AD, unless already accomplished. To prevent possible leaks in the ring main ducts of the passenger oxygen system, accomplish the following: (a) Gain access to and conduct a one-time inspection of the passenger oxygen ring main ducts in accordance with paragraph 2.1.1. of the "Accomplishment Instructions" of British Aircraft Corporation Alert Service Bulletin 35-A-PM 5124, Issue No. 1, dated February 12, 1973, or an FAA-approved equivalent. (b) If during the inspection required by paragraph (a) of this AD, chafing of any of the oxygen ducts is found or the clearance with adjacent structure is less than 0.050 inches, comply with the applicable provisions specified in paragraph 2.1.2, 2.1.3, 2.1.4, or 2.1.5 of BAC Alert Service Bulletin 35-A-PM 5124, dated February 12, 1973, or an FAA-approved equivalent. (c) If, as a result of any of the actions required by paragraph (b) of this AD, the use of the passenger oxygen system is restricted, install an FAA-approved placard in full view of the pilot which defines the restriction and states that flight operations must be limited to those allowed by the applicable operating rules for the particular airplane. This amendment becomes effective August 15, 1977. FOOTER:
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Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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