AD 91-26-09
final rule
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | DC-9-11 | Airworthiness Directives; McDONNELL DOUGLAS DC-9-10, -20, -30, -40, and -50 Series Airplanes and C-9 (Military) Series Airplanes |
| aircraft | The Boeing Company | DC-9-12 | Airworthiness Directives; McDONNELL DOUGLAS DC-9-10, -20, -30, -40, and -50 Series Airplanes and C-9 (Military) Series Airplanes |
| aircraft | The Boeing Company | DC-9-13 | Airworthiness Directives; McDONNELL DOUGLAS DC-9-10, -20, -30, -40, and -50 Series Airplanes and C-9 (Military) Series Airplanes |
| aircraft | The Boeing Company | DC-9-14 | Airworthiness Directives; McDONNELL DOUGLAS DC-9-10, -20, -30, -40, and -50 Series Airplanes and C-9 (Military) Series Airplanes |
| aircraft | The Boeing Company | DC-9-15 | Airworthiness Directives; McDONNELL DOUGLAS DC-9-10, -20, -30, -40, and -50 Series Airplanes and C-9 (Military) Series Airplanes |
| aircraft | The Boeing Company | DC-9-15F | Airworthiness Directives; McDONNELL DOUGLAS DC-9-10, -20, -30, -40, and -50 Series Airplanes and C-9 (Military) Series Airplanes |
| aircraft | The Boeing Company | DC-9-21 | Airworthiness Directives; McDONNELL DOUGLAS DC-9-10, -20, -30, -40, and -50 Series Airplanes and C-9 (Military) Series Airplanes |
| aircraft | The Boeing Company | DC-9-31 | Airworthiness Directives; McDONNELL DOUGLAS DC-9-10, -20, -30, -40, and -50 Series Airplanes and C-9 (Military) Series Airplanes |
| aircraft | The Boeing Company | DC-9-32 | Airworthiness Directives; McDONNELL DOUGLAS DC-9-10, -20, -30, -40, and -50 Series Airplanes and C-9 (Military) Series Airplanes |
| aircraft | The Boeing Company | DC-9-32 (VC-9C) | Airworthiness Directives; McDONNELL DOUGLAS DC-9-10, -20, -30, -40, and -50 Series Airplanes and C-9 (Military) Series Airplanes |
| aircraft | The Boeing Company | DC-9-32F | Airworthiness Directives; McDONNELL DOUGLAS DC-9-10, -20, -30, -40, and -50 Series Airplanes and C-9 (Military) Series Airplanes |
| aircraft | The Boeing Company | DC-9-32F (C-9A) | Airworthiness Directives; McDONNELL DOUGLAS DC-9-10, -20, -30, -40, and -50 Series Airplanes and C-9 (Military) Series Airplanes |
| aircraft | The Boeing Company | DC-9-32F (C-9B) | Airworthiness Directives; McDONNELL DOUGLAS DC-9-10, -20, -30, -40, and -50 Series Airplanes and C-9 (Military) Series Airplanes |
| aircraft | The Boeing Company | DC-9-33F | Airworthiness Directives; McDONNELL DOUGLAS DC-9-10, -20, -30, -40, and -50 Series Airplanes and C-9 (Military) Series Airplanes |
| aircraft | The Boeing Company | DC-9-34 | Airworthiness Directives; McDONNELL DOUGLAS DC-9-10, -20, -30, -40, and -50 Series Airplanes and C-9 (Military) Series Airplanes |
| aircraft | The Boeing Company | DC-9-34F | Airworthiness Directives; McDONNELL DOUGLAS DC-9-10, -20, -30, -40, and -50 Series Airplanes and C-9 (Military) Series Airplanes |
| aircraft | The Boeing Company | DC-9-41 | Airworthiness Directives; McDONNELL DOUGLAS DC-9-10, -20, -30, -40, and -50 Series Airplanes and C-9 (Military) Series Airplanes |
| aircraft | The Boeing Company | DC-9-51 | Airworthiness Directives; McDONNELL DOUGLAS DC-9-10, -20, -30, -40, and -50 Series Airplanes and C-9 (Military) Series Airplanes |
Unsafe Condition
Failure of the tailcone release system due to cracked or broken tailcone release handles.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect interior and exterior tailcone release handles for cracks and conduct functional tests within 60 days after February 11, 1991. Replace cracked or broken handles before further flight. Repeat inspections and tests every 3,000 flight hours or 15 months, whichever comes first. Replace or modify cable and handle assemblies within 90 days after February 17, 1992, per Service Bulletin 53-245. Report discrepancies within 30 days. Continue functional tests after modifications.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 60 days after February 11, 1991 (for initial inspection and functional test); within 90 days after February 17, 1992 (for cable and handle replacement/modification); repeat inspections and tests at intervals not exceeding 3,000 flight hours or 15 months, whichever occurs first.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
McDonnell Douglas DC-9-10, -20, -30, -40, -50 series and C-9 (Military) series airplanes operating in passenger or passenger/cargo configuration.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Tailcone Release Handles
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_91-26-09.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 91-26-09 Document Type: AD Final Rules Docket Number: 91-NM-136-AD Subject Heading: Airworthiness Directives; McDONNELL DOUGLAS DC-9-10, -20, -30, -40, and -50 Series Airplanes and C-9...Show more Subject: Tailcone Release Handles Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 02/17/1992 Make: The Boeing Company Model: DC-9-11 | DC-9-12 | DC-9-13 | DC-9-14 | DC-9-15 | DC-9-15F | DC-9-21 | DC-9-31 | DC-9-32 | DC-9-32 (...Show more 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: 91-26-09 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: 91-NM-136-AD AMENDMENT: 39-8122 AD NUMBER: 91-26-09 SUBJECT HEADING: Airworthiness Directives; McDONNELL DOUGLAS DC-9-10, -20, -30, -40, and -50 Series Airplanes and C-9 (Military) Series Airplanes ACTION: SUMMARY: DATES: Effective February 17, 1992. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 91-26-09 McDONNELL DOUGLAS: Amendment 39-8122. Docket No. 91-NM-136-AD. Supersedes AD 91-02-13, Amendment 39-6867. Applicability: Model DC-9-10, -20, -30, -40, and -50 series airplanes and C-9 (Military) series airplanes, operating in a passenger or passenger/cargo configuration, certificated in any category. Compliance: Required as indicated, unless previously accomplished. NOTE: The requirements of this AD become applicable at the time an airplane in an all-cargo configuration is converted to a passenger or passenger/cargo configuration. To prevent failure of the tailcone release system, accomplish the following: (a) Within 60 days after February 11, 1991 (the effective date of AD 91-02-13, Amendment 39-6867), unless previously accomplished within the last 60 days, inspect the interior and exterior tailcone release handles for cracks, in accordance with the Accomplishment Instructions of McDonnell Douglas Alert Service Bulletin A53-242, dated December 20, 1990, or Alert Service Bulletin A53-243, Revision 1, dated February 8, 1991; and accomplish a tailcone release system functional test in accordance with the Accomplishment Instructions of McDonnell Douglas Alert Service Bulletin A53-243, dated January 10, 1991, or Revision 1, dated February 8, 1991. (1) Cracked or broken tailcone release handles must be replaced prior to further flight. (2) Discrepancies in the operation of the tailcone release system found as a result of the functional test must be repaired prior to further flight. (b) Repeat the inspection of the interior and exterior tailcone release handles and conduct the functional test required by paragraph (a) of this AD at intervals not to exceed 3,000 flight hours or 15 months, whichever occurs first. (c) Within 30 days after discovery, report any cracked or broken tailcone release handles or any discrepancies found during the accomplishment of the inspection and functional tests required by paragraph (a) of this AD to the Manager, Los Angeles Aircraft Certification Office, 3229 East Spring Street, Long Beach, California 90806-2425. Information collection requirements contained in this regulation have been approved by the Office of Management and Budget (OMB) under the provisions of the Paperwork Reduction Act of 1990 (Pub. L 96-511) and have been assigned OMB Control Number 2120-0056. (d) Within 90 days after the effective date of this AD, replace or modify the internal and external tailcone release system cable and handle assemblies, in accordance with the Accomplishment Instructions of McDonnell Douglas Service Bulletin 53-245, Revision 1, dated June 12, 1991. Accomplishment of such replacement or modification constitutes terminating action for the repetitive inspections of the interior and exterior tailcone release handles for cracks, as required by paragraph (b) of this AD. However, the repetitive functional tests of the tailcone release system required by paragraph (b) of this AD must continue to be accomplished. NOTE: The following portions of the continuing repetitive functional tests and inspections of the tailcone release system are not necessary to accomplish once the replacement/modification of the cable and handle assembly is completed: Those procedures specified in paragraphs H. and L., and the second paragraph of the Notes of paragraphs F. and J., of the Accomplishment Instructions of McDonnell Douglas Alert Service Bulletin A53-243, dated January 10, 1991, Revision 1, dated February 8, 1991, and all of McDonnell Douglas Alert Service Bulletin A53-242, dated December 20, 1990. (e) 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, Los Angeles Aircraft Certification Office (ACO), FAA, Transport Airplane Directorate. NOTE: The request should be forwarded through an FAA Principal Maintenance Inspector, who may concur or comment and then send it to the Manager, Los Angeles ACO. (f) Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base in order to comply with the requirements of this AD. (g) The inspection requirements of this AD shall be accomplished in accordance with McDonnell Douglas Alert Service Bulletin A53-242, dated December 20, 1990, or McDonnell Douglas Alert Service Bulletin A53-243, Revision 1, dated February 8, 1991. The functional test requirements of this AD shall be accomplished in accordance with McDonnell Douglas Alert Service Bulletin A53-243, dated January 10, 1991, or McDonnell Douglas Alert Service Bulletin A53-243, Revision 1, dated February 8, 1991. The replacement and modification requirements shall be accomplished in accordance with McDonnell Douglas Service Bulletin 53-245, Revision 1, dated June 12, 1991. 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, Post Office Box 1771, Long Beach, California 90801, ATTN: Business unit Manager, Technical Publications, Technical Administration Support, C1-L5B(45-60). Copies may be inspected at the FAA, Northwest Mountain Region, Transport Airplane Directorate, 1601 Lind Avenue S.W., Renton, Washington; or at the Los Angeles Aircraft Certification Office, 3229 East Spring Street, Long Beach, California; or at the Office of the Federal Register, 1100 L Street N.W., Room 8401, Washington, D.C. (h) Airworthiness Directive 91-26-09, supersedes AD 91-02-13, Amendment 39-6867. (i) This amendment (39-8122, AD 91-26-09) becomes effective on February 17, 1992. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_91-26-09.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 91-26-09 Document Type: AD Final Rules Docket Number: 91-NM-136-AD Subject Heading: Airworthiness Directives; McDONNELL DOUGLAS DC-9-10, -20, -30, -40, and -50 Series Airplanes and C-9...Show more Subject: Tailcone Release Handles Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 02/17/1992 Make: The Boeing Company Model: DC-9-11 | DC-9-12 | DC-9-13 | DC-9-14 | DC-9-15 | DC-9-15F | DC-9-21 | DC-9-31 | DC-9-32 | DC-9-32 (...Show more 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: 91-26-09 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: 91-NM-136-AD AMENDMENT: 39-8122 AD NUMBER: 91-26-09 SUBJECT HEADING: Airworthiness Directives; McDONNELL DOUGLAS DC-9-10, -20, -30, -40, and -50 Series Airplanes and C-9 (Military) Series Airplanes ACTION: SUMMARY: DATES: Effective February 17, 1992. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 91-26-09 McDONNELL DOUGLAS: Amendment 39-8122. Docket No. 91-NM-136-AD. Supersedes AD 91-02-13, Amendment 39-6867. Applicability: Model DC-9-10, -20, -30, -40, and -50 series airplanes and C-9 (Military) series airplanes, operating in a passenger or passenger/cargo configuration, certificated in any category. Compliance: Required as indicated, unless previously accomplished. NOTE: The requirements of this AD become applicable at the time an airplane in an all-cargo configuration is converted to a passenger or passenger/cargo configuration. To prevent failure of the tailcone release system, accomplish the following: (a) Within 60 days after February 11, 1991 (the effective date of AD 91-02-13, Amendment 39-6867), unless previously accomplished within the last 60 days, inspect the interior and exterior tailcone release handles for cracks, in accordance with the Accomplishment Instructions of McDonnell Douglas Alert Service Bulletin A53-242, dated December 20, 1990, or Alert Service Bulletin A53-243, Revision 1, dated February 8, 1991; and accomplish a tailcone release system functional test in accordance with the Accomplishment Instructions of McDonnell Douglas Alert Service Bulletin A53-243, dated January 10, 1991, or Revision 1, dated February 8, 1991. (1) Cracked or broken tailcone release handles must be replaced prior to further flight. (2) Discrepancies in the operation of the tailcone release system found as a result of the functional test must be repaired prior to further flight. (b) Repeat the inspection of the interior and exterior tailcone release handles and conduct the functional test required by paragraph (a) of this AD at intervals not to exceed 3,000 flight hours or 15 months, whichever occurs first. (c) Within 30 days after discovery, report any cracked or broken tailcone release handles or any discrepancies found during the accomplishment of the inspection and functional tests required by paragraph (a) of this AD to the Manager, Los Angeles Aircraft Certification Office, 3229 East Spring Street, Long Beach, California 90806-2425. Information collection requirements contained in this regulation have been approved by the Office of Management and Budget (OMB) under the provisions of the Paperwork Reduction Act of 1990 (Pub. L 96-511) and have been assigned OMB Control Number 2120-0056. (d) Within 90 days after the effective date of this AD, replace or modify the internal and external tailcone release system cable and handle assemblies, in accordance with the Accomplishment Instructions of McDonnell Douglas Service Bulletin 53-245, Revision 1, dated June 12, 1991. Accomplishment of such replacement or modification constitutes terminating action for the repetitive inspections of the interior and exterior tailcone release handles for cracks, as required by paragraph (b) of this AD. However, the repetitive functional tests of the tailcone release system required by paragraph (b) of this AD must continue to be accomplished. NOTE: The following portions of the continuing repetitive functional tests and inspections of the tailcone release system are not necessary to accomplish once the replacement/modification of the cable and handle assembly is completed: Those procedures specified in paragraphs H. and L., and the second paragraph of the Notes of paragraphs F. and J., of the Accomplishment Instructions of McDonnell Douglas Alert Service Bulletin A53-243, dated January 10, 1991, Revision 1, dated February 8, 1991, and all of McDonnell Douglas Alert Service Bulletin A53-242, dated December 20, 1990. (e) 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, Los Angeles Aircraft Certification Office (ACO), FAA, Transport Airplane Directorate. NOTE: The request should be forwarded through an FAA Principal Maintenance Inspector, who may concur or comment and then send it to the Manager, Los Angeles ACO. (f) Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base in order to comply with the requirements of this AD. (g) The inspection requirements of this AD shall be accomplished in accordance with McDonnell Douglas Alert Service Bulletin A53-242, dated December 20, 1990, or McDonnell Douglas Alert Service Bulletin A53-243, Revision 1, dated February 8, 1991. The functional test requirements of this AD shall be accomplished in accordance with McDonnell Douglas Alert Service Bulletin A53-243, dated January 10, 1991, or McDonnell Douglas Alert Service Bulletin A53-243, Revision 1, dated February 8, 1991. The replacement and modification requirements shall be accomplished in accordance with McDonnell Douglas Service Bulletin 53-245, Revision 1, dated June 12, 1991. 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, Post Office Box 1771, Long Beach, California 90801, ATTN: Business unit Manager, Technical Publications, Technical Administration Support, C1-L5B(45-60). Copies may be inspected at the FAA, Northwest Mountain Region, Transport Airplane Directorate, 1601 Lind Avenue S.W., Renton, Washington; or at the Los Angeles Aircraft Certification Office, 3229 East Spring Street, Long Beach, California; or at the Office of the Federal Register, 1100 L Street N.W., Room 8401, Washington, D.C. (h) Airworthiness Directive 91-26-09, supersedes AD 91-02-13, Amendment 39-6867. (i) This amendment (39-8122, AD 91-26-09) becomes effective on February 17, 1992. FOOTER:
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Retrieved: Apr 8, 2026
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