AD 78-20-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bell Helicopter Textron, Inc. | 204B | Airworthiness Directives; Bell Model 204B, 205A-1 and model 212 Helicopters |
| aircraft | Bell Helicopter Textron, Inc. | 205A-1 | Airworthiness Directives; Bell Model 204B, 205A-1 and model 212 Helicopters |
| aircraft | Bell Helicopter Textron, Inc. | 212 | Airworthiness Directives; Bell Model 204B, 205A-1 and model 212 Helicopters |
Unsafe Condition
Failure of a fitting due to a crack in the thrust shoulder radius.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove main rotor inboard strap fittings with 1,100 or more hours total time in service within 100 hours time in service. Remove fittings with less than 1,100 hours total time in service prior to attaining 1,200 hours time in service. Reduce retirement time of fittings P/N 204-012-102-5 and 212-010-103-5 from 3,000 to 1,200 hours time in service.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 100 hours time in service or prior to attaining 1,200 hours time in service as specified.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Bell Model 204B and 205A-1 helicopters equipped with fittings P/N 204-012-102-5, and model 212 helicopters equipped with fittings P/N 212-010-103-5.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Shoulder Radius Fitting
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_78-20-07.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 78-20-07 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Bell Model 204B, 205A-1 and model 212 Helicopters Subject: Shoulder Radius Fitting Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 10/25/1978 Make: Bell Helicopter Textron, Inc. Model: 204B | 205A-1 | 212 Product Type: Aircraft Product Subtype: Rotorcraft Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 78-20-07 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-3303 AD NUMBER: 78-20-07 SUBJECT HEADING: Airworthiness Directives; Bell Model 204B, 205A-1 and model 212 Helicopters ACTION: SUMMARY: DATES: Effective October 25, 1978. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 78-20-07 BELL: Amendment 39-3303. Applies to Bell Models 204B and 205A-1 helicopters equipped with fittings, P/N 204-012-102-5, and model 212 helicopters equipped with fittings, P/N 212-010-103-5, certificated in all categories. Compliance required as indicated. To prevent possible failure of a fitting as a result of a crack in the thrust shoulder radius, accomplish the following: (a) Remove main rotor inboard strap fittings with 1,100 or more hours total time in service on the effective date of this airworthiness directive (AD) within 100 hours time in service. (b) Remove main rotor inboard strap fittings with less than 1,100 hours total time in service on the effective date of this AD, prior to attaining 1200 hours' total time in service. (c) The retirement time of the fittings P/N 204-012-102-5 and 212-010-103-5 is reduced from 3,000 to 1,200 hours time in service. This amendment is effective October 25, 1978. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_78-20-07.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 78-20-07 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Bell Model 204B, 205A-1 and model 212 Helicopters Subject: Shoulder Radius Fitting Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 10/25/1978 Make: Bell Helicopter Textron, Inc. Model: 204B | 205A-1 | 212 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: 78-20-07 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-3303 AD NUMBER: 78-20-07 SUBJECT HEADING: Airworthiness Directives; Bell Model 204B, 205A-1 and model 212 Helicopters ACTION: SUMMARY: DATES: Effective October 25, 1978. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 78-20-07 BELL: Amendment 39-3303. Applies to Bell Models 204B and 205A-1 helicopters equipped with fittings, P/N 204-012-102-5, and model 212 helicopters equipped with fittings, P/N 212-010-103-5, certificated in all categories. Compliance required as indicated. To prevent possible failure of a fitting as a result of a crack in the thrust shoulder radius, accomplish the following: (a) Remove main rotor inboard strap fittings with 1,100 or more hours total time in service on the effective date of this airworthiness directive (AD) within 100 hours time in service. (b) Remove main rotor inboard strap fittings with less than 1,100 hours total time in service on the effective date of this AD, prior to attaining 1200 hours' total time in service. (c) The retirement time of the fittings P/N 204-012-102-5 and 212-010-103-5 is reduced from 3,000 to 1,200 hours time in service. This amendment is effective October 25, 1978. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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