AD 93-05-13
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 747-400 Series | BOEING Model 747-400 Series Airplanes |
| aircraft | The Boeing Company | 747-400D Series | BOEING Model 747-400 Series Airplanes |
| aircraft | The Boeing Company | 747-400F Series | BOEING Model 747-400 Series Airplanes |
| aircraft | The Boeing Company | 767-200 Series | BOEING Model 747-400 Series Airplanes |
| aircraft | The Boeing Company | 767-300 Series | BOEING Model 747-400 Series Airplanes |
| aircraft | The Boeing Company | 767-300F Series | BOEING Model 747-400 Series Airplanes |
Unsafe Condition
The unsafe condition involves potential arcing, deterioration, unusual hardness or softness, and cracking of the elastomer insert in the electrical power feeder connectors at engine firewalls, which could lead to undetected fires in the engine strut.
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Required Actions
Perform a visual inspection of the power feeder connectors at each engine firewall to detect signs of arcing, deterioration, unusual hardness or softness, and cracking of the elastomer insert. If damaged connectors are found, replace them before further flight. Subsequent inspections must be conducted at intervals not exceeding 800 flight hours, with an initial inspection within 30 days after December 30, 1992.
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Compliance Time
Within 30 days after December 30, 1992 (the effective date of AD 92-27-02, Amendment 39-8435)
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Affected Aircraft
Boeing Model 747-400 series airplanes with line positions up to and including 958, equipped with Rolls Royce engines and electrical power feeder connectors at engine firewalls; and Model 767 series airplanes with variable numbers VN111 through VN124, and VN130 through VN132, equipped with Rolls Royce engines and electrical power feeder connectors at engine firewalls.
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Federal Register Abstract
Power Feeder Connectors
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_93-05-13.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 93-05-13 Document Type: AD Final Rules Docket Number: 92-NM-223-AD Subject Heading: BOEING Model 747-400 Series Airplanes Subject: Power Feeder Connectors Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 03/18/1993 Make: The Boeing Company Model: 747-400 Series | 747-400D Series | 747-400F Series | 767-200 Series | 767-300 Series | 767-300F 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: 93-05-13 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: 92-NM-223-AD AMENDMENT: 39-8517 AD NUMBER: 93-05-13 SUBJECT HEADING: BOEING Model 747-400 Series Airplanes ACTION: SUMMARY: DATES: Effective March 18, 1993. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 93-05-13 BOEING: Amendment 39-8517. Docket 92-NM-223-AD. Supersedes AD 92-27-02, Amendment 39-8435. Applicability: Model 747-400 series airplanes having line positions up to and including 958, inclusive, equipped with Rolls Royce engines and electrical power feeder connectors at engine firewalls; and Model 767 series airplanes having variable numbers VN111 through VN124, inclusive, and variable numbers VN130 through VN132, inclusive, equipped with Rolls Royce engines and electrical power feeder connectors at engine firewalls; certificated in any category. Compliance: Required as indicated, unless accomplished previously. To prevent undetected fires in the engine strut, accomplish the following: (a) Within 30 days after December 30, 1992 (the effective date of AD 92-27-02, Amendment 39-8435), perform a visual inspection of the power feeder connector at each engine firewall to detect signs of arcing, deterioration, unusual hardness or softness, and cracking of the elastomer insert, in accordance with Boeing Alert Service Bulletin 747-24A2190, dated November 16, 1992 (for Model 747-400 series airplanes); or Boeing Alert Service Bulletin 767- 24A0088, dated November 16, 1992 (for Model 767 series airplanes); as applicable. (1) If any damaged connector is found, prior to further flight, replace it in accordance with the applicable service bulletin. Prior to the accumulation of 1,200 flight hours on the new connector, perform the inspection required by paragraph (a) of this AD. Thereafter, repeat that inspection at intervals not to exceed 800 flight hours until the connector is replaced again. (2) If no damage is found and no connector is replaced, repeat the inspection required by paragraph (a) of this AD at intervals not to exceed 800 flight hours. (b) An alternative method of compliance or adjustment of the compliance time that provides an acceptable level of safety may be used if approved by the Manager, Seattle Aircraft Certification Office (ACO), FAA, Transport Airplane Directorate. Operators shall submit their requests through an appropriate FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, Seattle ACO. NOTE: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Seattle ACO. (c) Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate the airplane to a location where the requirements of this AD can be accomplished. (d) The inspections and replacement shall be done in accordance with Boeing Alert Service Bulletin 747-24A2190, dated November 16, 1992; or Boeing Alert Service Bulletin 767- 24A0088, dated November 16, 1992; as applicable. This incorporation by reference was approved previously by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR Part 51, as of December 30, 1992 (57 FR 59285, December 15, 1992). Copies may be obtained from Boeing Commercial Airplane Group, P.O. Box 3707, Seattle, Washington 98124-2207. Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC. (e) This amendment becomes effective on March 18, 1993. FOOTER:
Document Text
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AD Final Rules - DRS_93-05-13.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 93-05-13 Document Type: AD Final Rules Docket Number: 92-NM-223-AD Subject Heading: BOEING Model 747-400 Series Airplanes Subject: Power Feeder Connectors Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 03/18/1993 Make: The Boeing Company Model: 747-400 Series | 747-400D Series | 747-400F Series | 767-200 Series | 767-300 Series | 767-300F 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: 93-05-13 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: 92-NM-223-AD AMENDMENT: 39-8517 AD NUMBER: 93-05-13 SUBJECT HEADING: BOEING Model 747-400 Series Airplanes ACTION: SUMMARY: DATES: Effective March 18, 1993. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 93-05-13 BOEING: Amendment 39-8517. Docket 92-NM-223-AD. Supersedes AD 92-27-02, Amendment 39-8435. Applicability: Model 747-400 series airplanes having line positions up to and including 958, inclusive, equipped with Rolls Royce engines and electrical power feeder connectors at engine firewalls; and Model 767 series airplanes having variable numbers VN111 through VN124, inclusive, and variable numbers VN130 through VN132, inclusive, equipped with Rolls Royce engines and electrical power feeder connectors at engine firewalls; certificated in any category. Compliance: Required as indicated, unless accomplished previously. To prevent undetected fires in the engine strut, accomplish the following: (a) Within 30 days after December 30, 1992 (the effective date of AD 92-27-02, Amendment 39-8435), perform a visual inspection of the power feeder connector at each engine firewall to detect signs of arcing, deterioration, unusual hardness or softness, and cracking of the elastomer insert, in accordance with Boeing Alert Service Bulletin 747-24A2190, dated November 16, 1992 (for Model 747-400 series airplanes); or Boeing Alert Service Bulletin 767- 24A0088, dated November 16, 1992 (for Model 767 series airplanes); as applicable. (1) If any damaged connector is found, prior to further flight, replace it in accordance with the applicable service bulletin. Prior to the accumulation of 1,200 flight hours on the new connector, perform the inspection required by paragraph (a) of this AD. Thereafter, repeat that inspection at intervals not to exceed 800 flight hours until the connector is replaced again. (2) If no damage is found and no connector is replaced, repeat the inspection required by paragraph (a) of this AD at intervals not to exceed 800 flight hours. (b) An alternative method of compliance or adjustment of the compliance time that provides an acceptable level of safety may be used if approved by the Manager, Seattle Aircraft Certification Office (ACO), FAA, Transport Airplane Directorate. Operators shall submit their requests through an appropriate FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, Seattle ACO. NOTE: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Seattle ACO. (c) Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate the airplane to a location where the requirements of this AD can be accomplished. (d) The inspections and replacement shall be done in accordance with Boeing Alert Service Bulletin 747-24A2190, dated November 16, 1992; or Boeing Alert Service Bulletin 767- 24A0088, dated November 16, 1992; as applicable. This incorporation by reference was approved previously by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR Part 51, as of December 30, 1992 (57 FR 59285, December 15, 1992). Copies may be obtained from Boeing Commercial Airplane Group, P.O. Box 3707, Seattle, Washington 98124-2207. Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC. (e) This amendment becomes effective on March 18, 1993. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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