AD T84-18-51
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bell Helicopter Textron, Inc. | 214ST | Airworthiness Directives; BELL HELICOPTER TEXTRON, INCORPORATED Model 214ST Helicopters |
Unsafe Condition
Failure of the main rotor spindles P/N 214-010-103-003 due to cracking or fatigue.
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Required Actions
Remove from service spindles with 1250 or more hours time in service by October 15, 1984, and thereafter every 1250 hours. Perform daily inspections using Bell Alert Service Bulletin 214ST-84-24 or approved procedure. Replace spindles with 1250+ hours within 150 hours or by October 15, 1984, whichever comes first.
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Compliance Time
Within the next 150 hours time in service or October 15, 1984, whichever occurs first.
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Affected Aircraft
Bell Helicopter Textron, Inc. Model 214ST helicopters equipped with main rotor spindles P/N 214-010-103-003.
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Federal Register Abstract
Main Rotor Spindles
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_T84-18-51.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: T84-18-51 Document Type: AD Final Rules Docket Number: 84-ASW-42 Subject Heading: Airworthiness Directives; BELL HELICOPTER TEXTRON, INCORPORATED Model 214ST Helicopters Subject: Main Rotor Spindles Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Bell Helicopter Textron, Inc. Model: 214ST Product Type: Aircraft Product Subtype: Rotorcraft Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: T84-18-51 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: 84-ASW-42 AMENDMENT: AD NUMBER: T84-18-51 SUBJECT HEADING: Airworthiness Directives; BELL HELICOPTER TEXTRON, INCORPORATED Model 214ST Helicopters ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: T84-18-51 BELL HELICOPTER TEXTRON, INCORPORATED: Telegram issued September 7, 1984. Applies to Bell Helicopter Textron, Incorporated, Model 214ST helicopters certified in all categories that are equipped with main rotor spindles P/N 214-010-103-003 (Airworthiness Docket No. 84-ASW-42). Compliance is required as indicated. To prevent possible failure of the main rotor spindles, accomplish the following: A. Remove from service any spindle with 1250 or more hours time in service on October 15, 1984, and thereafter at intervals not to exceed 1250 hours time in service. B. After the effective date of this AD, for aircraft with spindles which have, or attain, 1250 or more hours time in service, perform a daily inspection of the main rotor spindle as prescribed in Bell Alert Service Bulletin 214ST-84-24 or other FAA approved equivalent procedure. Remove any cracked spindle from service and replace with a serviceable spindle. C. After the effective date of this AD, replace all spindles having, or attaining 1250 or more hours time in service, within the next 150 hours time in service or October 15, 1984, whichever occurs first. D. The helicopter may be flown to a repair base for the above inspection under the provisions of FAR 21.197. E. Any equivalent means of compliance with this AD must be approved by the Manager, Helicopter Certification Branch, Federal Aviation Administration, Southwest Region. F. Bell Helicopter Textron, Incorporated, Telegraphic Alert Service Bulletin 214ST- 84-23 is an equivalent means of compliance with this AD. This airworthiness directive becomes effective upon receipt. FOOTER:
Document Text
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AD Final Rules - DRS_T84-18-51.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: T84-18-51 Document Type: AD Final Rules Docket Number: 84-ASW-42 Subject Heading: Airworthiness Directives; BELL HELICOPTER TEXTRON, INCORPORATED Model 214ST Helicopters Subject: Main Rotor Spindles Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Bell Helicopter Textron, Inc. Model: 214ST 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: T84-18-51 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: 84-ASW-42 AMENDMENT: AD NUMBER: T84-18-51 SUBJECT HEADING: Airworthiness Directives; BELL HELICOPTER TEXTRON, INCORPORATED Model 214ST Helicopters ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: T84-18-51 BELL HELICOPTER TEXTRON, INCORPORATED: Telegram issued September 7, 1984. Applies to Bell Helicopter Textron, Incorporated, Model 214ST helicopters certified in all categories that are equipped with main rotor spindles P/N 214-010-103-003 (Airworthiness Docket No. 84-ASW-42). Compliance is required as indicated. To prevent possible failure of the main rotor spindles, accomplish the following: A. Remove from service any spindle with 1250 or more hours time in service on October 15, 1984, and thereafter at intervals not to exceed 1250 hours time in service. B. After the effective date of this AD, for aircraft with spindles which have, or attain, 1250 or more hours time in service, perform a daily inspection of the main rotor spindle as prescribed in Bell Alert Service Bulletin 214ST-84-24 or other FAA approved equivalent procedure. Remove any cracked spindle from service and replace with a serviceable spindle. C. After the effective date of this AD, replace all spindles having, or attaining 1250 or more hours time in service, within the next 150 hours time in service or October 15, 1984, whichever occurs first. D. The helicopter may be flown to a repair base for the above inspection under the provisions of FAR 21.197. E. Any equivalent means of compliance with this AD must be approved by the Manager, Helicopter Certification Branch, Federal Aviation Administration, Southwest Region. F. Bell Helicopter Textron, Incorporated, Telegraphic Alert Service Bulletin 214ST- 84-23 is an equivalent means of compliance with this AD. This airworthiness directive becomes effective upon receipt. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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