AD 70-13-01
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
Overheating of the razor socket supply transformer P/N RD.10590 when a non-compatible electrical appliance is connected into a razor socket.
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Required Actions
De-activate the razor sockets by disconnecting, insulating, and tying back the socket supply cable from the circuit breaker and fitting a locking clamp to the circuit breaker knob; or modify the razor socket circuit to provide a 1/4 ampere fuse in the positive line of the rectified output of the transformer as per British Aircraft Corporation Service Bulletin 25-PM4458 or FAA-approved equivalent.
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Compliance Time
within the next 1500 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 with razor socket supply transformer P/N RD.10590 installed.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Razor Socket Supply Transformer
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_70-13-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 70-13-01 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: Razor Socket Supply Transformer Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 07/13/1970 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Model: BAC 1-11 200 Series | BAC 1-11 400 Series Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 70-13-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-1012 AD NUMBER: 70-13-01 SUBJECT HEADING: Airworthiness Directives; BRITISH AIRCRAFT CORPORATION Models BAC 1-11 200 and 400 Series Airplanes ACTION: SUMMARY: DATES: Effective July 13, 1970. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 70-13-01 BRITISH AIRCRAFT CORPORATION: Amdt. 39-1012. Applies to Models BAC 1-11 200 and 400 series airplanes having razor socket supply transformer P/N RD.10590 installed. To prevent overheating of the razor socket supply transformer when a non-compatible electrical appliance is connected into a razor socket, within the next 1500 hours' time in service after the effective date of this AD, unless already accomplished, accomplish either of the following: (a) De-activate the razor sockets by disconnecting, insulating, and tying back the socket supply cable from the appropriate circuit breaker and fitting a locking clamp to the circuit breaker knob; or (b) Modify the razor socket circuit to provide a 1/4 ampere fuse in the positive line of the rectified output of the transformer in accordance with British Aircraft Corporation Model BAC 1-11 Service Bulletin No. 25-PM4458 dated February 9, 1970, or a later ARB-approved issue, or an FAA-approved equivalent. (British Aircraft Corporation Model BAC 1-11 Service Bulletin No. 25-A-PM4458 refers to this subject.) This amendment becomes effective July 13, 1970. FOOTER:
Document Text
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AD Final Rules - DRS_70-13-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 70-13-01 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: Razor Socket Supply Transformer Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 07/13/1970 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: 70-13-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-1012 AD NUMBER: 70-13-01 SUBJECT HEADING: Airworthiness Directives; BRITISH AIRCRAFT CORPORATION Models BAC 1-11 200 and 400 Series Airplanes ACTION: SUMMARY: DATES: Effective July 13, 1970. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 70-13-01 BRITISH AIRCRAFT CORPORATION: Amdt. 39-1012. Applies to Models BAC 1-11 200 and 400 series airplanes having razor socket supply transformer P/N RD.10590 installed. To prevent overheating of the razor socket supply transformer when a non-compatible electrical appliance is connected into a razor socket, within the next 1500 hours' time in service after the effective date of this AD, unless already accomplished, accomplish either of the following: (a) De-activate the razor sockets by disconnecting, insulating, and tying back the socket supply cable from the appropriate circuit breaker and fitting a locking clamp to the circuit breaker knob; or (b) Modify the razor socket circuit to provide a 1/4 ampere fuse in the positive line of the rectified output of the transformer in accordance with British Aircraft Corporation Model BAC 1-11 Service Bulletin No. 25-PM4458 dated February 9, 1970, or a later ARB-approved issue, or an FAA-approved equivalent. (British Aircraft Corporation Model BAC 1-11 Service Bulletin No. 25-A-PM4458 refers to this subject.) This amendment becomes effective July 13, 1970. FOOTER:
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Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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