AD 70-07-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bell Helicopter Textron Canada Limited | 206A | Airworthiness Directives; BELL Model 206A Helicopters |
Unsafe Condition
The Planetary Gear Support Spider, P/N 206-040-041-1, may fail due to fatigue cracking after accumulating 500 hours' time in service, leading to transmission failure and possible loss of helicopter control.
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Required Actions
Replace Planetary Gear Support Spiders P/N 206-040-041-1 with redesigned P/N 206-040-080-3 and new shafts P/N 206-040-043-5, or use serviceable P/N 206-040-041-1 with less than 450 hours' time in service. Remove and replace as specified based on time in service prior to exceeding thresholds.
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Compliance Time
Prior to accumulating 500 hours' time in service or within 50 hours' time in service after the effective date (May 1, 1970), depending on the existing time in service on the effective date.
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Affected Aircraft
Bell Helicopter Textron Canada Limited Model 206A helicopters with transmissions incorporating Planetary Gear Support Spider P/N 206-040-041-1.
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Federal Register Abstract
Planetary Gear Support Spiders
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_70-07-03.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 70-07-03 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; BELL Model 206A Helicopters Subject: Planetary Gear Support Spiders Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 05/01/1970 Make: Bell Helicopter Textron Canada Limited Model: 206A Product Type: Aircraft Product Subtype: Rotorcraft Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 70-07-03 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-962 AD NUMBER: 70-07-03 SUBJECT HEADING: Airworthiness Directives; BELL Model 206A Helicopters ACTION: SUMMARY: DATES: Effective May 1, 1970. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 70-07-03 BELL: Amdt. 39-962. Applies to Model 206A Helicopters with transmissions incorporating Planetary Gear Support Spider, P/N 206-040-041-1. Compliance required as indicated: a. Planetary Gear Support Spiders P/N 206-040-041-1, with less than 450 hours' time in service on the effective date of this airworthiness directive must be removed from service prior to accumulating 500 hours' time in service. b. Planetary Gear Support Spiders, P/N 206-040-041-1, with more than 450 hours' time in service on the effective date of this airworthiness directive must be removed from service within 50 hours' time in service after the effective date of this directive. c. Retired Planetary Gear Support Spiders may be replaced with either the redesigned, heavy duty, Planetary Gear Support Spider P/N 206-040-080-3, using redesigned Shafts, P/N 206-040-043-5 (three required) in lieu of Shafts, P/N 206-040-043-3, or a serviceable Planetary Gear Support Spider, P/N 206-040-041-1, with less than 450 hours' total time in service. This latter item must be removed prior to accumulating 500 hours' total time in service. Removal and replacement is to be accomplished in accordance with the Maintenance and Overhaul Instructions for the Bell Model 206A helicopter or an equivalent method approved by the Chief, Engineering and Manufacturing Branch, FAA Southwest Region. (Bell Helicopter Service Bulletin No. 206A-14, Revision B, dated 1-23-70, pertains to this subject.) This amendment becomes effective May 1, 1970. FOOTER:
Document Text
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AD Final Rules - DRS_70-07-03.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 70-07-03 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; BELL Model 206A Helicopters Subject: Planetary Gear Support Spiders Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 05/01/1970 Make: Bell Helicopter Textron Canada Limited Model: 206A 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: 70-07-03 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-962 AD NUMBER: 70-07-03 SUBJECT HEADING: Airworthiness Directives; BELL Model 206A Helicopters ACTION: SUMMARY: DATES: Effective May 1, 1970. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 70-07-03 BELL: Amdt. 39-962. Applies to Model 206A Helicopters with transmissions incorporating Planetary Gear Support Spider, P/N 206-040-041-1. Compliance required as indicated: a. Planetary Gear Support Spiders P/N 206-040-041-1, with less than 450 hours' time in service on the effective date of this airworthiness directive must be removed from service prior to accumulating 500 hours' time in service. b. Planetary Gear Support Spiders, P/N 206-040-041-1, with more than 450 hours' time in service on the effective date of this airworthiness directive must be removed from service within 50 hours' time in service after the effective date of this directive. c. Retired Planetary Gear Support Spiders may be replaced with either the redesigned, heavy duty, Planetary Gear Support Spider P/N 206-040-080-3, using redesigned Shafts, P/N 206-040-043-5 (three required) in lieu of Shafts, P/N 206-040-043-3, or a serviceable Planetary Gear Support Spider, P/N 206-040-041-1, with less than 450 hours' total time in service. This latter item must be removed prior to accumulating 500 hours' total time in service. Removal and replacement is to be accomplished in accordance with the Maintenance and Overhaul Instructions for the Bell Model 206A helicopter or an equivalent method approved by the Chief, Engineering and Manufacturing Branch, FAA Southwest Region. (Bell Helicopter Service Bulletin No. 206A-14, Revision B, dated 1-23-70, pertains to this subject.) This amendment becomes effective May 1, 1970. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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