AD 77-08-07
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
The inability to release an external load due to potential failure of wire bundle 22VB (P/N 105-98327) and associated connector plug 5MDA in the external load hook assembly (P/N 105-80322).
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Within 5 hours time in service after the AD's effective date, either install an operating limitation placard prohibiting external load operations or replace wire bundle 22VB with P/N 105-98326 and modify connector plug 5MDA per MBB Service Bulletin No. 80-21. The placard may be removed after completing the wiring modification.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 5 hours time in service after the effective date of this AD
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Affected Aircraft
Messerschmitt-Bolkow-Blohm (MBB) Model BO-105A and BO-105C helicopters, serial numbers S101 through S200, with external load hook assembly P/N 105-80322
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
External Load Release
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_77-08-07.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 77-08-07 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Messerschmitt-Bolkow-Blohm (MBB): Model BO-105A and BO-105C Helicopters Subject: External Load Release Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 05/06/1977 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Helicopters Deutschland GmbH Model: BO-105A | BO-105C Product Type: Aircraft Product Subtype: Rotorcraft Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 77-08-07 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2880 AD NUMBER: 77-08-07 SUBJECT HEADING: Airworthiness Directives; Messerschmitt-Bolkow-Blohm (MBB): Model BO-105A and BO-105C Helicopters ACTION: SUMMARY: DATES: Effective May 6, 1977. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 77-08-07 MESSERSCHMITT-BOLKOW-BLOHM (MBB): Amendment 39-2880. Applies to Model BO-105A and BO-105C helicopters, serial numbers S101 through S200, certificated in all categories, that incorporate external load hook assembly P/N 105-80322. Compliance is required as indicated, unless already accomplished. To prevent the possible inability to release an external load, accomplish the following: (a) Within the next 5 hours time in service after the effective date of this AD, either - (1) Install an operating limitation placard on the instrument panel in full view of the pilot, setting forth the following limitation "EXTERNAL LOAD OPERATIONS PROHIBITED"; or (2) Replace wire bundle 22VB, P/N 105-98327, with new bundle, P/N 105- 98326, and change the wiring connection of the associated connector plug 5MDA in accordance with subparagraph 2B of MBB Service Bulletin No. 80-21, dated July 25, 1975, or equivalent approved by the Chief, Aircraft Certification Staff, FAA, Europe, Africa, and Middle East Region, c/o American Embassy, A.P.O. New York, N.Y. 09667. (b) The operating limitation placard required by paragraph (a)(1) of this AD may be removed upon compliance with paragraph (a)(2) of this AD. This amendment becomes effective May 6, 1977. FOOTER:
Document Text
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AD Final Rules - DRS_77-08-07.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 77-08-07 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Messerschmitt-Bolkow-Blohm (MBB): Model BO-105A and BO-105C Helicopters Subject: External Load Release Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 05/06/1977 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: 77-08-07 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2880 AD NUMBER: 77-08-07 SUBJECT HEADING: Airworthiness Directives; Messerschmitt-Bolkow-Blohm (MBB): Model BO-105A and BO-105C Helicopters ACTION: SUMMARY: DATES: Effective May 6, 1977. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 77-08-07 MESSERSCHMITT-BOLKOW-BLOHM (MBB): Amendment 39-2880. Applies to Model BO-105A and BO-105C helicopters, serial numbers S101 through S200, certificated in all categories, that incorporate external load hook assembly P/N 105-80322. Compliance is required as indicated, unless already accomplished. To prevent the possible inability to release an external load, accomplish the following: (a) Within the next 5 hours time in service after the effective date of this AD, either - (1) Install an operating limitation placard on the instrument panel in full view of the pilot, setting forth the following limitation "EXTERNAL LOAD OPERATIONS PROHIBITED"; or (2) Replace wire bundle 22VB, P/N 105-98327, with new bundle, P/N 105- 98326, and change the wiring connection of the associated connector plug 5MDA in accordance with subparagraph 2B of MBB Service Bulletin No. 80-21, dated July 25, 1975, or equivalent approved by the Chief, Aircraft Certification Staff, FAA, Europe, Africa, and Middle East Region, c/o American Embassy, A.P.O. New York, N.Y. 09667. (b) The operating limitation placard required by paragraph (a)(1) of this AD may be removed upon compliance with paragraph (a)(2) of this AD. This amendment becomes effective May 6, 1977. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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