AD 92-11-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus Helicopters Deutschland GmbH | BO-105LS A-3 | Airworthiness Directives; MESSERSCHMITT-BOLKOW-BLOHM (MBB) Model BO 105 LS A-3 Helicopters |
Unsafe Condition
Failure of the torque indication hose assembly during an engine compartment fire could fuel the fire with engine oil, leading to possible loss of the helicopter.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace the existing torque indication hose, part number AE707355-1, with a fire resistant hose, part number AE705145-14, following MBB Alert Service Bulletin ASB-BO 105 LS-60-4, Revision 1. Special flight permits may be obtained under FAR 21.197 and 21.199 to operate to a maintenance location.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Required no later than July 31, 1992, unless previously accomplished.
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Affected Aircraft
MBB Model BO 105 LS A-3 helicopters, serial numbers 2001 through 2037, equipped with torque indication hose assembly part number AE707355-1.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Torque Indication Hose Assembly
Applicability Source Text
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AD Final Rules - DRS_92-11-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 92-11-01 Document Type: AD Final Rules Docket Number: 92-ASW-12 Subject Heading: Airworthiness Directives; MESSERSCHMITT-BOLKOW-BLOHM (MBB) Model BO 105 LS A-3 Helicopters Subject: Torque Indication Hose Assembly Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 08/28/1992 Make: Airbus Helicopters Deutschland GmbH Model: BO-105LS A-3 Product Type: Aircraft Product Subtype: Rotorcraft Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 92-11-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: 92-ASW-12 AMENDMENT: 39-8250 AD NUMBER: 92-11-01 SUBJECT HEADING: Airworthiness Directives; MESSERSCHMITT-BOLKOW-BLOHM (MBB) Model BO 105 LS A-3 Helicopters ACTION: SUMMARY: DATES: Effective August 28, 1992. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 92-11-01 MESSERSCHMITT-BOLKOW-BLOHM (MBB): Amendment 39-8250. Docket Number 92-ASW-12. Applicability: MBB Model BO 105 LS A-3 helicopters, serial numbers (S/N) 2001 through 2037, certificated in any category and equipped with a torque indication hose assembly, part number (P/N) AE707355-1. Compliance: Required no later than July 31, 1992, unless previously accomplished. To prevent failure of the torque indication hose assembly during an engine compartment fire, thereby, fueling the fire with engine oil and leading to possible loss of the helicopter, accomplish the following: (a) Replace the existing torque indication hose, P/N AE707355-1, on each engine with a new fire resistant torque indication hose, P/N AE705145-14, in accordance with Part 2, Accomplishment Instructions of MBB Alert Service Bulletin No. ASB-BO 105 LS-60-4, Revision 1, dated November 15, 1991. (b) Special flights permits may be issued in accordance with FAR 21.197 and 21.199 to operate the helicopter to a location where the requirements of this AD can be accomplished. (c) 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, New York Aircraft Certification Office, FAA, 181 South Franklin Avenue, Room 202, Valley Stream, New York 11581. The request shall be forwarded through an FAA Principal Maintenance Inspector, who may concur or comment and then send it to the Manager of the New York Aircraft Certification Office. NOTE: Information concerning the existence of approved alternative methods of compliance with this airworthiness directive, if any, may be obtained from the Manager, New York Aircraft Certification Office. (d) The removal and replacement of the torque indication hose shall be done in accordance with Part 2, Accomplishment Instructions of MBB Helicopters Alert Service Bulletin No. ASB-BO 105 LS-60-4, which incorporates the following pages: Pages Revision Level Date 1 through 2 Revision 1 November 15, 1991 3 through 5 Original August 30, 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 MBB Helicopter Corporation, 900 Airport Road, P.O. Box 2349, West Chester, Pennsylvania 19380. Copies may be inspected at the FAA, Office of the Assistant Chief Counsel, 4400 Blue Mound Road, Bldg. 3B, Room 158, Fort Worth, Texas; or at the Office of the Federal Register, 1100 L Street N.W., Room 8401, Washington, D.C. (e) This amendment becomes effective on August 28, 1992. FOOTER:
Document Text
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AD Final Rules - DRS_92-11-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 92-11-01 Document Type: AD Final Rules Docket Number: 92-ASW-12 Subject Heading: Airworthiness Directives; MESSERSCHMITT-BOLKOW-BLOHM (MBB) Model BO 105 LS A-3 Helicopters Subject: Torque Indication Hose Assembly Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 08/28/1992 Make: Airbus Helicopters Deutschland GmbH Model: BO-105LS A-3 Product Type: Aircraft Product Subtype: Rotorcraft Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 92-11-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: 92-ASW-12 AMENDMENT: 39-8250 AD NUMBER: 92-11-01 SUBJECT HEADING: Airworthiness Directives; MESSERSCHMITT-BOLKOW-BLOHM (MBB) Model BO 105 LS A-3 Helicopters ACTION: SUMMARY: DATES: Effective August 28, 1992. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 92-11-01 MESSERSCHMITT-BOLKOW-BLOHM (MBB): Amendment 39-8250. Docket Number 92-ASW-12. Applicability: MBB Model BO 105 LS A-3 helicopters, serial numbers (S/N) 2001 through 2037, certificated in any category and equipped with a torque indication hose assembly, part number (P/N) AE707355-1. Compliance: Required no later than July 31, 1992, unless previously accomplished. To prevent failure of the torque indication hose assembly during an engine compartment fire, thereby, fueling the fire with engine oil and leading to possible loss of the helicopter, accomplish the following: (a) Replace the existing torque indication hose, P/N AE707355-1, on each engine with a new fire resistant torque indication hose, P/N AE705145-14, in accordance with Part 2, Accomplishment Instructions of MBB Alert Service Bulletin No. ASB-BO 105 LS-60-4, Revision 1, dated November 15, 1991. (b) Special flights permits may be issued in accordance with FAR 21.197 and 21.199 to operate the helicopter to a location where the requirements of this AD can be accomplished. (c) 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, New York Aircraft Certification Office, FAA, 181 South Franklin Avenue, Room 202, Valley Stream, New York 11581. The request shall be forwarded through an FAA Principal Maintenance Inspector, who may concur or comment and then send it to the Manager of the New York Aircraft Certification Office. NOTE: Information concerning the existence of approved alternative methods of compliance with this airworthiness directive, if any, may be obtained from the Manager, New York Aircraft Certification Office. (d) The removal and replacement of the torque indication hose shall be done in accordance with Part 2, Accomplishment Instructions of MBB Helicopters Alert Service Bulletin No. ASB-BO 105 LS-60-4, which incorporates the following pages: Pages Revision Level Date 1 through 2 Revision 1 November 15, 1991 3 through 5 Original August 30, 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 MBB Helicopter Corporation, 900 Airport Road, P.O. Box 2349, West Chester, Pennsylvania 19380. Copies may be inspected at the FAA, Office of the Assistant Chief Counsel, 4400 Blue Mound Road, Bldg. 3B, Room 158, Fort Worth, Texas; or at the Office of the Federal Register, 1100 L Street N.W., Room 8401, Washington, D.C. (e) This amendment becomes effective on August 28, 1992. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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