AD 92-08-12
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 747-400 Series | Airworthiness Directives; BOEING Mode 747-400 Series Airplanes |
| aircraft | The Boeing Company | 747-400D Series | Airworthiness Directives; BOEING Mode 747-400 Series Airplanes |
Unsafe Condition
Cross connection of cargo compartment and engine fire protection wiring and plumbing during maintenance could lead to unsafe conditions.
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Required Actions
Modify the cargo compartment fire extinguishing system plumbing and wiring per Boeing Service Bulletin 747-26-2143, Rev 1; modify the engine fire control module per SB 747-26-2164; modify the cargo smoke detection system wiring per SB 747-26-2168. Compliance with alternative methods may be approved by FAA's Seattle ACO.
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Compliance Time
Within the next 24 months after the effective date of this AD, unless accomplished previously.
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Affected Aircraft
Boeing Model 747-400 series airplanes up to and including line position 839.
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Federal Register Abstract
Fire Extinguishing System
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_92-08-12.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 92-08-12 Document Type: AD Final Rules Docket Number: 91-NM-95-AD Subject Heading: Airworthiness Directives; BOEING Mode 747-400 Series Airplanes Subject: Fire Extinguishing System Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 05/29/1992 Make: The Boeing Company Model: 747-400 Series | 747-400D Series Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: Updated RGL applicability to match AD applicability; CAR C-11-185 AIRWORTHINESS DIRECTIVES FINAL RULES: 92-08-12 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: 91-NM-95-AD AMENDMENT: 39-8223 AD NUMBER: 92-08-12 SUBJECT HEADING: Airworthiness Directives; BOEING Mode 747-400 Series Airplanes ACTION: SUMMARY: DATES: Effective May 29, 1992 ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 92-08-12 BOEING: Amendment 39-8223. Docket No. 91-NM-95-AD. Applicability: Model 747-400 series airplanes, up to and including line position 839, certificated in any category. Compliance: Required within the next 24 months after the effective date of this AD, unless accomplished previously. To preclude cross connection of cargo compartment and engine fire protection wiring and plumbing during maintenance, accomplish the following: (a) For airplanes identified in Boeing Service Bulletin 747-26-2143, Revision 1, dated August 15, 1991: Modify the cargo compartment fire extinguishing system plumbing and wiring in accordance with that service bulletin. (b) For airplanes identified in Boeing Service Bulletin 747-26-2164, dated February 14, 1991: Modify the engine fire control module in accordance with that service bulletin. (c) For airplanes identified in Boeing Service Bulletin 747-26-2168, dated March 28, 1991: Modify the cargo compartment smoke detection system wiring in accordance with that service bulletin. (d) An alternative method of compliance or adjustment of the compliance time, which provides an acceptable level of safety, may be used when approved by the Manager, Seattle Aircraft Certification Office (ACO), FAA, Transport Airplane Directorate. The request shall be forwarded through an FAA Principal Maintenance Inspector, who may concur or comment and then send it to the Manager, Seattle ACO. (e) 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. (f) The modifications shall be done in accordance with Boeing Service Bulletin 747-26-2164, dated February 14, 1991; Boeing Service Bulletin 747-26-2168, dated March 28, 1991; and Boeing Service Bulletin 747-26-2143, Revision 1, dated August 15, 1991, which includes the following list of effective pages: Page Number Revision Level Date 1, 3-8, 18-20, 33, 45-50, 1 August 15, 1991 54, 61-62, 64-87 2, 9-17, 21-32, 34-44, (original) December 20, 51-53, 55-60, 63 1990 This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR Part 51. Copies may be obtained from Boeing Commercial Airplane Group, P.O. Box 3707, Seattle, Washington 98124. Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue SW., Renton, Washington; or at the Office of the Federal Register, 1100 L Street NW., Room 8401, Washington, DC. (g) This amendment becomes effective on May 29, 1992. FOOTER:
Document Text
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AD Final Rules - DRS_92-08-12.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 92-08-12 Document Type: AD Final Rules Docket Number: 91-NM-95-AD Subject Heading: Airworthiness Directives; BOEING Mode 747-400 Series Airplanes Subject: Fire Extinguishing System Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 05/29/1992 Make: The Boeing Company Model: 747-400 Series | 747-400D 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: Updated RGL applicability to match AD applicability; CAR C-11-185 AIRWORTHINESS DIRECTIVES FINAL RULES: 92-08-12 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: 91-NM-95-AD AMENDMENT: 39-8223 AD NUMBER: 92-08-12 SUBJECT HEADING: Airworthiness Directives; BOEING Mode 747-400 Series Airplanes ACTION: SUMMARY: DATES: Effective May 29, 1992 ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 92-08-12 BOEING: Amendment 39-8223. Docket No. 91-NM-95-AD. Applicability: Model 747-400 series airplanes, up to and including line position 839, certificated in any category. Compliance: Required within the next 24 months after the effective date of this AD, unless accomplished previously. To preclude cross connection of cargo compartment and engine fire protection wiring and plumbing during maintenance, accomplish the following: (a) For airplanes identified in Boeing Service Bulletin 747-26-2143, Revision 1, dated August 15, 1991: Modify the cargo compartment fire extinguishing system plumbing and wiring in accordance with that service bulletin. (b) For airplanes identified in Boeing Service Bulletin 747-26-2164, dated February 14, 1991: Modify the engine fire control module in accordance with that service bulletin. (c) For airplanes identified in Boeing Service Bulletin 747-26-2168, dated March 28, 1991: Modify the cargo compartment smoke detection system wiring in accordance with that service bulletin. (d) An alternative method of compliance or adjustment of the compliance time, which provides an acceptable level of safety, may be used when approved by the Manager, Seattle Aircraft Certification Office (ACO), FAA, Transport Airplane Directorate. The request shall be forwarded through an FAA Principal Maintenance Inspector, who may concur or comment and then send it to the Manager, Seattle ACO. (e) 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. (f) The modifications shall be done in accordance with Boeing Service Bulletin 747-26-2164, dated February 14, 1991; Boeing Service Bulletin 747-26-2168, dated March 28, 1991; and Boeing Service Bulletin 747-26-2143, Revision 1, dated August 15, 1991, which includes the following list of effective pages: Page Number Revision Level Date 1, 3-8, 18-20, 33, 45-50, 1 August 15, 1991 54, 61-62, 64-87 2, 9-17, 21-32, 34-44, (original) December 20, 51-53, 55-60, 63 1990 This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR Part 51. Copies may be obtained from Boeing Commercial Airplane Group, P.O. Box 3707, Seattle, Washington 98124. Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue SW., Renton, Washington; or at the Office of the Federal Register, 1100 L Street NW., Room 8401, Washington, DC. (g) This amendment becomes effective on May 29, 1992. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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