AD 70-14-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bell Helicopter Textron Canada Limited | 206A | Airworthiness Directives; Bell Model 206A Helicopters |
Unsafe Condition
Failure of the voltage regulator, Bell Part No. 206-075-027-3, could result in loss of electrical power to essential systems.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace the voltage regulator Bell Part No. 206-075-027-3 following instructions in Bell Helicopter Company Service Letter No. 206A-139, Revision 'A', dated October 14, 1969, or later FAA approved revision. Alternate means of compliance may be approved by the Chief, Engineering and Manufacturing Branch, FAA.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within 300 hours time in service after the effective date of this airworthiness directive
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Bell Helicopter Textron Canada Limited Model 206A helicopters equipped with voltage regulator P/N 206-075-027-3
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Voltage Regulator
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_70-14-05.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 70-14-05 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Bell Model 206A Helicopters Subject: Voltage Regulator Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 08/15/1970 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Bell Helicopter Textron Canada Limited Model: 206A Product Type: Aircraft Product Subtype: Rotorcraft Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 70-14-05 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-1025 AD NUMBER: 70-14-05 SUBJECT HEADING: Airworthiness Directives; Bell Model 206A Helicopters ACTION: SUMMARY: DATES: Effective August 15, 1970. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 70-14-05 BELL: Amendment 39-1025. Applies to all Model 206A helicopters certificated in all categories equipped with voltage regulator P/N 206-075-027-3. Compliance is required within 300 hours time in service after the effective date of this airworthiness directive, unless already accomplished. Replace the voltage regulator, Bell Part No. 206-075-027-3, in accordance with the instructions in paragraphs 1 through 11, as applicable, of Bell Helicopter Company Service Letter No. 206A-139, Revision "A", dated October 14, 1969, or later FAA approved revision. Alternate means of compliance or equivalent replacement parts may be acceptable if approved by the Chief, Engineering and Manufacturing Branch, Flight Standards Division, Southwest Region, Federal Aviation Administration. This amendment becomes effective August 15, 1970. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_70-14-05.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 70-14-05 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Bell Model 206A Helicopters Subject: Voltage Regulator Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 08/15/1970 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: 70-14-05 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-1025 AD NUMBER: 70-14-05 SUBJECT HEADING: Airworthiness Directives; Bell Model 206A Helicopters ACTION: SUMMARY: DATES: Effective August 15, 1970. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 70-14-05 BELL: Amendment 39-1025. Applies to all Model 206A helicopters certificated in all categories equipped with voltage regulator P/N 206-075-027-3. Compliance is required within 300 hours time in service after the effective date of this airworthiness directive, unless already accomplished. Replace the voltage regulator, Bell Part No. 206-075-027-3, in accordance with the instructions in paragraphs 1 through 11, as applicable, of Bell Helicopter Company Service Letter No. 206A-139, Revision "A", dated October 14, 1969, or later FAA approved revision. Alternate means of compliance or equivalent replacement parts may be acceptable if approved by the Chief, Engineering and Manufacturing Branch, Flight Standards Division, Southwest Region, Federal Aviation Administration. This amendment becomes effective August 15, 1970. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.
Related Airworthiness Directives
2019-08-10
final ruleAirworthiness Directives; Bell Helicopter Textron Canada Limited Helicopters
Unsafe Condition: A blocked oil line restrictor in the freewheel lubrication system could cause failure of the freewheel assembly, failure of the main rotor mast, and subsequent loss of control of the helicopter.
2018-25-17
final ruleAirworthiness Directives; Air Comm Corporation Air Conditioning Systems
Unsafe Condition: An overheated connector, which could result in a fire and subsequent loss of control of the helicopter.
2017-05-04
final ruleAirworthiness Directives; Bell Helicopter Textron Canada Limited Helicopters
Unsafe Condition: Corrosion of a tension-torsion strap (TT strap), which could result in failure of the TT strap and subsequent loss of control of the helicopter.
2013-22-21
final ruleAirworthiness Directives; Bell Helicopter Textron, Inc., Helicopters
Unsafe Condition: Incorrectly installed float inflation hoses, which could result in failure of the emergency floats to inflate fully during an emergency.