AD 76-18-10
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus Helicopters Deutschland GmbH | BO-105A | Airworthiness Directives; Messerschmitt-Bolkow-Blohm (MBB) Model BO-105A and BO-105C Helicopters |
| aircraft | Airbus Helicopters Deutschland GmbH | BO-105C | Airworthiness Directives; Messerschmitt-Bolkow-Blohm (MBB) Model BO-105A and BO-105C Helicopters |
Unsafe Condition
Failure of the engine mount assembly
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Determine the part numbers of the existing right outboard engine mount flanges and washers and their corresponding replacement flanges and washers. Replace the existing flanges and washers with new ones in accordance with MBB BO-105 Service Bulletin No. 60-25, Revision 1, dated October 13, 1975 or an FAA-approved equivalent.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before the accumulation of 600 hours total time in service (for helicopters with ≤500 hours on effective date) or within the next 100 hours time in service (for helicopters with >500 hours on effective date).
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Messerschmitt-Bolkow-Blohm (MBB) Model BO-105A and BO-105C helicopters, Serial Numbers 1 through 280.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Engine mount assembly
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_76-18-10.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 76-18-10 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Messerschmitt-Bolkow-Blohm (MBB) Model BO-105A and BO-105C Helicopters Subject: Engine mount assembly Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 10/01/1976 Make: Airbus Helicopters Deutschland GmbH Model: BO-105A | BO-105C Product Type: Aircraft Product Subtype: Rotorcraft Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 76-18-10 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2719 AD NUMBER: 76-18-10 SUBJECT HEADING: Airworthiness Directives; Messerschmitt-Bolkow-Blohm (MBB) Model BO-105A and BO-105C Helicopters ACTION: SUMMARY: DATES: Effective October 1, 1976. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 76-18-10 MESSERSCHMITT-BOLKOW-BLOHM (MBB): Amendment 39-2719. Applies to Model BO-105A and BO-105C helicopters, Serial Numbers 1 through 280, certificated in all categories. Compliance is required as indicated, unless already accomplished. To prevent failure of the engine mount assembly, accomplish the following: (a) For helicopters with 500 hours or less total time in service on the effective date of this AD, comply with paragraph (c) of this AD before the accumulation of 600 hours total time in service. (b) For helicopters with more than 500 hours total time in service on the effective date of this AD, comply with paragraph (c) of this AD within the next 100 hours time in service. (c) Determine the part numbers of the existing right outboard engine mount flanges and washers and their corresponding replacement flanges and washers and replace the existing flanges and washers with the new flanges and washers in accordance with paragraph 2 entitled "Accomplishment Instructions" of MBB BO-105 Service Bulletin No. 60-25, Revision 1, dated October 13, 1975 or an FAA-approved equivalent. This amendment becomes effective on October 1, 1976. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_76-18-10.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 76-18-10 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Messerschmitt-Bolkow-Blohm (MBB) Model BO-105A and BO-105C Helicopters Subject: Engine mount assembly Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 10/01/1976 Make: Airbus Helicopters Deutschland GmbH Model: BO-105A | BO-105C 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: 76-18-10 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2719 AD NUMBER: 76-18-10 SUBJECT HEADING: Airworthiness Directives; Messerschmitt-Bolkow-Blohm (MBB) Model BO-105A and BO-105C Helicopters ACTION: SUMMARY: DATES: Effective October 1, 1976. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 76-18-10 MESSERSCHMITT-BOLKOW-BLOHM (MBB): Amendment 39-2719. Applies to Model BO-105A and BO-105C helicopters, Serial Numbers 1 through 280, certificated in all categories. Compliance is required as indicated, unless already accomplished. To prevent failure of the engine mount assembly, accomplish the following: (a) For helicopters with 500 hours or less total time in service on the effective date of this AD, comply with paragraph (c) of this AD before the accumulation of 600 hours total time in service. (b) For helicopters with more than 500 hours total time in service on the effective date of this AD, comply with paragraph (c) of this AD within the next 100 hours time in service. (c) Determine the part numbers of the existing right outboard engine mount flanges and washers and their corresponding replacement flanges and washers and replace the existing flanges and washers with the new flanges and washers in accordance with paragraph 2 entitled "Accomplishment Instructions" of MBB BO-105 Service Bulletin No. 60-25, Revision 1, dated October 13, 1975 or an FAA-approved equivalent. This amendment becomes effective on October 1, 1976. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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