AD 77-05-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | MD Helicopters, Inc. | 369D | Airworthiness Directives; Hughes Model 369D Helicopters |
Unsafe Condition
Binding of the tail rotor control system and damage to the tail rotor output shaft.
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Required Actions
Disassemble the tail rotor control assembly, install Hughes P/N 369D21806 rotating boot and Hughes P/N 369D21807 stationary boot, and reassemble in accordance with Hughes Handbook of Maintenance Instruction. Equivalent replacement parts may be used if approved by the Chief, Aircraft Engineering Division, FAA Western Region. Special flight permits may be issued under 21.197 and 21.199 to operate helicopters to a base for installation.
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Compliance Time
Within 30 calendar days from the effective date of this AD
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Affected Aircraft
Hughes Model 369D helicopters, serial numbers 0003 through 0049, manufactured without protective boots on the tail rotor output shaft.
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Federal Register Abstract
Tail Rotor Control System
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_77-05-03.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 77-05-03 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Hughes Model 369D Helicopters Subject: Tail Rotor Control System Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 03/07/1977 Make: MD Helicopters, Inc. Model: 369D Product Type: Aircraft Product Subtype: Rotorcraft Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 77-05-03 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2845 AD NUMBER: 77-05-03 SUBJECT HEADING: Airworthiness Directives; Hughes Model 369D Helicopters ACTION: SUMMARY: DATES: Effective March 7, 1977. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 77-05-03 HUGHES HELICOPTERS: Amendment 39-2845. Applies to Hughes Model 369D helicopters Serial No. 0003 through 0049, certificated in all categories, that were manufactured without protective boots on the tail rotor output shaft. Compliance required as indicated unless already accomplished. To prevent binding of the tail rotor control system and damage to the tail rotor output shaft, accomplish the following: (a) Within 30 calender days from the effective date of this AD, disassemble the tail rotor control assembly, install Hughes P/N 369D21806 rotating boot and Hughes P/N 369D21807 stationary boot, and reassemble in accordance with Hughes Handbook of Maintenance Instruction. (b) Equivalent replacement parts may be used when approved by the Chief, Aircraft Engineering Division, FAA Western Region. (c) Special flight permits may be issued in accordance with 21.197 and 21.199 to operate helicopters to a base for the accomplishment of the installation required by this AD. This amendment becomes effective March 7, 1977. FOOTER:
Document Text
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AD Final Rules - DRS_77-05-03.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 77-05-03 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Hughes Model 369D Helicopters Subject: Tail Rotor Control System Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 03/07/1977 Make: MD Helicopters, Inc. Model: 369D 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: 77-05-03 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2845 AD NUMBER: 77-05-03 SUBJECT HEADING: Airworthiness Directives; Hughes Model 369D Helicopters ACTION: SUMMARY: DATES: Effective March 7, 1977. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 77-05-03 HUGHES HELICOPTERS: Amendment 39-2845. Applies to Hughes Model 369D helicopters Serial No. 0003 through 0049, certificated in all categories, that were manufactured without protective boots on the tail rotor output shaft. Compliance required as indicated unless already accomplished. To prevent binding of the tail rotor control system and damage to the tail rotor output shaft, accomplish the following: (a) Within 30 calender days from the effective date of this AD, disassemble the tail rotor control assembly, install Hughes P/N 369D21806 rotating boot and Hughes P/N 369D21807 stationary boot, and reassemble in accordance with Hughes Handbook of Maintenance Instruction. (b) Equivalent replacement parts may be used when approved by the Chief, Aircraft Engineering Division, FAA Western Region. (c) Special flight permits may be issued in accordance with 21.197 and 21.199 to operate helicopters to a base for the accomplishment of the installation required by this AD. This amendment becomes effective March 7, 1977. FOOTER:
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Retrieved: Apr 8, 2026
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