AD 93-12-03
final rule
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | MD-11 | Airworthiness Directives; MCDONNELL DOUGLAS MD-11 Series Airplanes |
| aircraft | The Boeing Company | MD-11F | Airworthiness Directives; MCDONNELL DOUGLAS MD-11 Series Airplanes |
Unsafe Condition
Fuel leakage into the center cargo bilge area that could lead to a fire in the cargo compartment.
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Required Actions
Modify the plumbing on the forward spar of the tail fuel tank within 30 days after the effective date. Perform a pressure check of the fuel shroud drain system before further flight. If the system fails the check, repair or replace the failed line, repeat the pressure check, and inspect/replace fuel-contaminated insulation blankets. If the system passes, no further action is required.
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Compliance Time
Within 30 days after the effective date of this AD
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Affected Aircraft
Model MD-11 series airplanes as listed in McDonnell Douglas MD-11 Alert Service Bulletin A28-56, Revision 1, dated June 14, 1993, certificated in any category.
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Federal Register Abstract
Tail Fuel Tank
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_93-12-03.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 93-12-03 Document Type: AD Final Rules Docket Number: 93-NM-81-AD Subject Heading: Airworthiness Directives; MCDONNELL DOUGLAS MD-11 Series Airplanes Subject: Tail Fuel Tank Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 07/07/1993 Make: The Boeing Company Model: MD-11 | MD-11F Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 93-12-03 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: 93-NM-81-AD AMENDMENT: 39-8609 AD NUMBER: 93-12-03 SUBJECT HEADING: Airworthiness Directives; MCDONNELL DOUGLAS MD-11 Series Airplanes ACTION: SUMMARY: DATES: Effective July 7, 1993. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 93-12-03 MCDONNELL DOUGLAS: Amendment 39-8609. Docket 93-NM-81-AD. Applicability: Model MD-11 series airplanes, as listed in McDonnell Douglas MD-11 Alert Service Bulletin A28-56, Revision 1, dated June 14, 1993, certificated in any category. Compliance: Required as indicated, unless accomplished previously. To prevent fuel leakage into the center cargo bilge area that could lead to a fire in the cargo compartment, accomplish the following: (a) Within 30 days after the effective date of this AD, modify the plumbing on the forward spar of the tail fuel tank in accordance with the Accomplishment Instructions of McDonnell Douglas MD-11 Alert Service Bulletin A28-56, dated May 25, 1993, or Revision 1, dated June 14, 1993. (b) Immediately following the modification, prior to further flight, perform a pressure check of the fuel shroud drain system in accordance with the Accomplishment Instructions of McDonnell Douglas MD-11 Alert Service Bulletin A28-56, dated May 25, 1993, or Revision 1, dated June 14, 1993. (1) If the fuel shroud drain system fails the pressure check, prior to further flight, accomplish the requirements in paragraph (b)(1)(i) and (b)(1)(ii) of this AD. (i) Repair, or replace the failed line with a serviceable or new line and repeat the pressure check of the fuel shroud drain system in accordance with the Accomplishment Instructions of either service bulletin. (ii) Inspect the insulation blankets in the center cargo bilge area to detect fuel contamination and replace any fuel contaminated insulation blanket with a serviceable blanket in accordance with the Accomplishment Instructions of McDonnell Douglas MD-11 Alert Service Bulletin A28-56, Revision 1, dated June 14, 1993. (2) If the fuel shroud drain system passes the pressure check, no further action is required by this AD. (c) 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, Los Angeles 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, Los Angeles ACO. NOTE: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Los Angeles ACO. (d) 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. (e) The modification, pressure check, and repair or replacement shall be done in accordance with McDonnell Douglas MD-11 Alert Service Bulletin A28-56, dated May 25, 1993; or McDonnell Douglas MD-11 Alert Service Bulletin A28-56, Revision 1, dated June 14, 1993. 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 McDonnell Douglas Corporation, P.O. Box 1771, Long Beach, California 90801-1771, Attention: Business Unit Manager, Technical Publications - Technical Administrative Support, C1-L5B. Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at FAA, Transport Airplane Directorate, Los Angeles Aircraft Certification Office, 3229 East Spring Street, Long Beach, California; or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC. (f) This amendment becomes effective on July 7, 1993. FOOTER:
Document Text
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AD Final Rules - DRS_93-12-03.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 93-12-03 Document Type: AD Final Rules Docket Number: 93-NM-81-AD Subject Heading: Airworthiness Directives; MCDONNELL DOUGLAS MD-11 Series Airplanes Subject: Tail Fuel Tank Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 07/07/1993 Make: The Boeing Company Model: MD-11 | MD-11F 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: 93-12-03 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: 93-NM-81-AD AMENDMENT: 39-8609 AD NUMBER: 93-12-03 SUBJECT HEADING: Airworthiness Directives; MCDONNELL DOUGLAS MD-11 Series Airplanes ACTION: SUMMARY: DATES: Effective July 7, 1993. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 93-12-03 MCDONNELL DOUGLAS: Amendment 39-8609. Docket 93-NM-81-AD. Applicability: Model MD-11 series airplanes, as listed in McDonnell Douglas MD-11 Alert Service Bulletin A28-56, Revision 1, dated June 14, 1993, certificated in any category. Compliance: Required as indicated, unless accomplished previously. To prevent fuel leakage into the center cargo bilge area that could lead to a fire in the cargo compartment, accomplish the following: (a) Within 30 days after the effective date of this AD, modify the plumbing on the forward spar of the tail fuel tank in accordance with the Accomplishment Instructions of McDonnell Douglas MD-11 Alert Service Bulletin A28-56, dated May 25, 1993, or Revision 1, dated June 14, 1993. (b) Immediately following the modification, prior to further flight, perform a pressure check of the fuel shroud drain system in accordance with the Accomplishment Instructions of McDonnell Douglas MD-11 Alert Service Bulletin A28-56, dated May 25, 1993, or Revision 1, dated June 14, 1993. (1) If the fuel shroud drain system fails the pressure check, prior to further flight, accomplish the requirements in paragraph (b)(1)(i) and (b)(1)(ii) of this AD. (i) Repair, or replace the failed line with a serviceable or new line and repeat the pressure check of the fuel shroud drain system in accordance with the Accomplishment Instructions of either service bulletin. (ii) Inspect the insulation blankets in the center cargo bilge area to detect fuel contamination and replace any fuel contaminated insulation blanket with a serviceable blanket in accordance with the Accomplishment Instructions of McDonnell Douglas MD-11 Alert Service Bulletin A28-56, Revision 1, dated June 14, 1993. (2) If the fuel shroud drain system passes the pressure check, no further action is required by this AD. (c) 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, Los Angeles 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, Los Angeles ACO. NOTE: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Los Angeles ACO. (d) 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. (e) The modification, pressure check, and repair or replacement shall be done in accordance with McDonnell Douglas MD-11 Alert Service Bulletin A28-56, dated May 25, 1993; or McDonnell Douglas MD-11 Alert Service Bulletin A28-56, Revision 1, dated June 14, 1993. 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 McDonnell Douglas Corporation, P.O. Box 1771, Long Beach, California 90801-1771, Attention: Business Unit Manager, Technical Publications - Technical Administrative Support, C1-L5B. Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at FAA, Transport Airplane Directorate, Los Angeles Aircraft Certification Office, 3229 East Spring Street, Long Beach, California; or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC. (f) This amendment becomes effective on July 7, 1993. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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