AD 77-21-08
final rule
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus SAS | BAC 1-11 200 Series | Airworthiness Directives; BRITISH AIRCRAFT CORPORATION Model BAC 1-11 Airplanes |
| aircraft | Airbus SAS | BAC 1-11 400 Series | Airworthiness Directives; BRITISH AIRCRAFT CORPORATION Model BAC 1-11 Airplanes |
Unsafe Condition
Fuel leakage into the cargo compartment which may result in a fire or explosion
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Required Actions
Do not add fuel to the auxiliary fuel tanks installed per STC SA2971WE before further flight. Deactivate or remove the auxiliary fuel system within 12 hours time in service by purging tanks, closing valves, disconnecting wiring, securing circuit breakers, logging, and placarding, or follow National Aircraft Leasing Report NA 3-1060 for removal. Equivalent procedures may be approved by FAA.
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Compliance Time
Before further flight after the effective date of this AD and within 12 hours time in service after the effective date
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Affected Aircraft
BAC 1-11 airplanes certificated in all categories incorporating auxiliary fuel tanks per supplemental type certificate SA2971WE
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Federal Register Abstract
Auxiliary Fuel System
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_77-21-08.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 77-21-08 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; BRITISH AIRCRAFT CORPORATION Model BAC 1-11 Airplanes Subject: Auxiliary Fuel System Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 01/31/1978 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Model: BAC 1-11 200 Series | BAC 1-11 400 Series Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 77-21-08 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-3129 AD NUMBER: 77-21-08 SUBJECT HEADING: Airworthiness Directives; BRITISH AIRCRAFT CORPORATION Model BAC 1-11 Airplanes ACTION: SUMMARY: DATES: Effective January 31, 1978. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 77-21-08 BRITISH AIRCRAFT CORPORATION: Amendment 39-3062 as amended by Amendment 39-3129. Applies to BAC 1-11 airplanes certificated in all categories incorporating auxiliary fuel tanks per supplemental type certificate SA2971WE. Compliance required as indicated. To prevent possible fuel leakage into the cargo compartment which may result in a fire or explosion accomplish the following: (a) Before further flight after the effective date of this AD, do not add fuel to the auxiliary fuel tanks installed per STC SA2971WE. (b) Within 12 hours time in service after the effective date of this AD, unless already accomplished, accomplish either (1) or (2): (1) Deactivate the auxiliary fuel system as follows: (i) Purge all auxiliary fuel tanks. (ii) Close all auxiliary fuel tanks and fuel vent valves. (iii) Disconnect auxiliary tank electrical connectors and secure wiring. (iv) Pull all auxiliary fuel tank circuit breakers in the cockpit to the off position and lock out with a positive device. (v) Make entry in the log book. (vi) Placard cockpit auxiliary fuel panel inoperative. NOTE: National Aircraft Leasing Report TA 4-2 dated September 1, 1977 is an acceptable procedure for deactivation. (2) Remove the auxiliary fuel system in accordance with National Aircraft Leasing Report NA 3-1060 dated September 5, 1975. (c) Equivalent procedures and modifications may be approved by the Chief, Aircraft Engineering Division, FAA Western Region. (d) The limitation required by Paragraph (a) may be removed and the deactivation or removal required by Paragraph (b) may be reactivated or reinstalled, after the auxiliary fuel system is modified in accordance with National Aircraft Leasing Service Bulletin TA-4-8 Revision "A" dated November 22, 1977 or later FAA approved revision. Amendment 39-3062 became effective November 25, 1977 for all persons except those to whom it was made effective by telegram dated September 2, 1977, which contained this amendment. This amendment 39-3129 becomes effective January 31, 1978. FOOTER:
Document Text
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AD Final Rules - DRS_77-21-08.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 77-21-08 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; BRITISH AIRCRAFT CORPORATION Model BAC 1-11 Airplanes Subject: Auxiliary Fuel System Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 01/31/1978 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: 77-21-08 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-3129 AD NUMBER: 77-21-08 SUBJECT HEADING: Airworthiness Directives; BRITISH AIRCRAFT CORPORATION Model BAC 1-11 Airplanes ACTION: SUMMARY: DATES: Effective January 31, 1978. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 77-21-08 BRITISH AIRCRAFT CORPORATION: Amendment 39-3062 as amended by Amendment 39-3129. Applies to BAC 1-11 airplanes certificated in all categories incorporating auxiliary fuel tanks per supplemental type certificate SA2971WE. Compliance required as indicated. To prevent possible fuel leakage into the cargo compartment which may result in a fire or explosion accomplish the following: (a) Before further flight after the effective date of this AD, do not add fuel to the auxiliary fuel tanks installed per STC SA2971WE. (b) Within 12 hours time in service after the effective date of this AD, unless already accomplished, accomplish either (1) or (2): (1) Deactivate the auxiliary fuel system as follows: (i) Purge all auxiliary fuel tanks. (ii) Close all auxiliary fuel tanks and fuel vent valves. (iii) Disconnect auxiliary tank electrical connectors and secure wiring. (iv) Pull all auxiliary fuel tank circuit breakers in the cockpit to the off position and lock out with a positive device. (v) Make entry in the log book. (vi) Placard cockpit auxiliary fuel panel inoperative. NOTE: National Aircraft Leasing Report TA 4-2 dated September 1, 1977 is an acceptable procedure for deactivation. (2) Remove the auxiliary fuel system in accordance with National Aircraft Leasing Report NA 3-1060 dated September 5, 1975. (c) Equivalent procedures and modifications may be approved by the Chief, Aircraft Engineering Division, FAA Western Region. (d) The limitation required by Paragraph (a) may be removed and the deactivation or removal required by Paragraph (b) may be reactivated or reinstalled, after the auxiliary fuel system is modified in accordance with National Aircraft Leasing Service Bulletin TA-4-8 Revision "A" dated November 22, 1977 or later FAA approved revision. Amendment 39-3062 became effective November 25, 1977 for all persons except those to whom it was made effective by telegram dated September 2, 1977, which contained this amendment. This amendment 39-3129 becomes effective January 31, 1978. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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