AD 67-06-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bell Helicopter Textron, Inc. | 204B | Airworthiness Directives; Bell Model 204-B Helicopters |
Unsafe Condition
Tail rotor blades may not be properly balanced and tracked, leading to improper balance and track which could result in tail rotor instability or failure.
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Required Actions
Track the hub and blade assembly within 100 hours' time in service after the effective date, unless already done within the last 25 hours. Balance the assembly within 100 hours' time in service after the effective date, unless already done within the last 200 hours. Thereafter, track every 100 hours' time in service and balance every 300 hours' time in service. Adjust intervals may be approved upon request with substantiating data.
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Compliance Time
Within the next 100 hours' time in service after the effective date of this AD
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Affected Aircraft
Bell Model 204-B Helicopters equipped with Tail Rotor Hub and Blade Assembly, P/N 204-011-701-9 or 204-011-701-15.
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Federal Register Abstract
Tail Rotor Blades
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_67-06-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 67-06-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Bell Model 204-B Helicopters Subject: Tail Rotor Blades Status: Current Citation: Federal Register: February 4, 1967 Citation Publish Date: 02/04/1967 Effective Date: 02/09/1967 Make: Bell Helicopter Textron, Inc. Model: 204B Product Type: Aircraft Product Subtype: Rotorcraft Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 67-06-01 CITATION: [Federal Register: February 4, 1967] PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-348 AD NUMBER: 67-06-01 SUBJECT HEADING: Airworthiness Directives; Bell Model 204-B Helicopters ACTION: SUMMARY: DATES: Effective February 9, 1967. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 67-06-01 BELL: Amdt. 39-348, Part 39, Federal Register February 4, 1967. Applies to Model 204-B Helicopters Equipped With Tail Rotor Hub and Blade Assembly, P/N 204-011-701- 9 or 204-011-701-15. Compliance required as indicated. To assure proper balance and track of the tail rotor blades, accomplish the following: (a) Within the next 100 hours' time in service after the effective date of this AD, unless already accomplished within the last 25 hours' time in service, and thereafter at intervals not to exceed 100 hours' time in service from the date of the last tracking, the hub and blade assembly must be tracked in accordance with the Bell Model 204B Maintenance Manual, Section VI. (b) Within the next 100 hours' time in service after the effective date of this AD, unless already accomplished within the last 200 hours' time in service, and thereafter at intervals not to exceed 300 hours' time in service from the date of the last balancing, the hub and blade assembly must be balanced in accordance with the Bell Model 204B Maintenance Manual, Section VI. (c) Upon request of the operator, an FAA maintenance inspector, subject to prior approval of the Chief, Engineering and Manufacturing Branch, FAA, Southwest Region, may adjust the repetitive balancing and tracking intervals specified in this AD to permit compliance at an established inspection period of the operator if the request contains substantiating data to justify the interval increase for such operator. (Bell Service Bulletin 204B-1 also pertains to this subject.) This directive effective February 9, 1967. FOOTER:
Document Text
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AD Final Rules - DRS_67-06-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 67-06-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Bell Model 204-B Helicopters Subject: Tail Rotor Blades Status: Current Citation: Federal Register: February 4, 1967 Citation Publish Date: 02/04/1967 Effective Date: 02/09/1967 Make: Bell Helicopter Textron, Inc. Model: 204B 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: 67-06-01 CITATION: [Federal Register: February 4, 1967] PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-348 AD NUMBER: 67-06-01 SUBJECT HEADING: Airworthiness Directives; Bell Model 204-B Helicopters ACTION: SUMMARY: DATES: Effective February 9, 1967. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 67-06-01 BELL: Amdt. 39-348, Part 39, Federal Register February 4, 1967. Applies to Model 204-B Helicopters Equipped With Tail Rotor Hub and Blade Assembly, P/N 204-011-701- 9 or 204-011-701-15. Compliance required as indicated. To assure proper balance and track of the tail rotor blades, accomplish the following: (a) Within the next 100 hours' time in service after the effective date of this AD, unless already accomplished within the last 25 hours' time in service, and thereafter at intervals not to exceed 100 hours' time in service from the date of the last tracking, the hub and blade assembly must be tracked in accordance with the Bell Model 204B Maintenance Manual, Section VI. (b) Within the next 100 hours' time in service after the effective date of this AD, unless already accomplished within the last 200 hours' time in service, and thereafter at intervals not to exceed 300 hours' time in service from the date of the last balancing, the hub and blade assembly must be balanced in accordance with the Bell Model 204B Maintenance Manual, Section VI. (c) Upon request of the operator, an FAA maintenance inspector, subject to prior approval of the Chief, Engineering and Manufacturing Branch, FAA, Southwest Region, may adjust the repetitive balancing and tracking intervals specified in this AD to permit compliance at an established inspection period of the operator if the request contains substantiating data to justify the interval increase for such operator. (Bell Service Bulletin 204B-1 also pertains to this subject.) This directive effective February 9, 1967. FOOTER:
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Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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