AD 86-20-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bell Helicopter Textron, Inc. | 214B | Airworthiness Directives; BELL HELICOPTER TEXTRON, INC. Model 214ST, 214B and 214B-1 Helicopters |
| aircraft | Bell Helicopter Textron, Inc. | 214B-1 | Airworthiness Directives; BELL HELICOPTER TEXTRON, INC. Model 214ST, 214B and 214B-1 Helicopters |
| aircraft | Bell Helicopter Textron, Inc. | 214ST | Airworthiness Directives; BELL HELICOPTER TEXTRON, INC. Model 214ST, 214B and 214B-1 Helicopters |
Unsafe Condition
Failure of the main rotor drag brace assembly, part number 214-010-113-001.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace the main rotor drag brace assembly with part number 214-010-113-105 for Model 214ST helicopters and part number 214-010-113-107 for Models 214B and 214B-1. Compliance may be achieved through an approved alternate method providing equivalent safety.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 50 hours' time in service or within 30 days after the effective date of this AD, whichever comes first.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Bell Helicopter Textron, Inc. Model 214ST helicopters, serial numbers 28101 through 28159, and Models 214B and 214B-1, serial numbers 28001 through 28070, equipped with main rotor drag brace assembly part number 214-010-113-001.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Main Rotor Drag Brace Assembly
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_86-20-06.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 86-20-06 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; BELL HELICOPTER TEXTRON, INC. Model 214ST, 214B and 214B-1 Helicopters Subject: Main Rotor Drag Brace Assembly Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 10/18/1986 Make: Bell Helicopter Textron, Inc. Model: 214B | 214B-1 | 214ST Product Type: Aircraft Product Subtype: Rotorcraft Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 86-20-06 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-5427 AD NUMBER: 86-20-06 SUBJECT HEADING: Airworthiness Directives; BELL HELICOPTER TEXTRON, INC. Model 214ST, 214B and 214B-1 Helicopters ACTION: SUMMARY: DATES: Effective October 18, 1986. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 86-20-06 BELL HELICOPTER TEXTRON, INC.: Amendment 39-5427. Applies to Bell Helicopter Textron, Inc., Model 214ST helicopters, S/N's 28101 through 28159, and Models 214B and 214B-1, S/N's 28001 through 28070, certificated in any category, equipped with main rotor drag brace assembly P/N 214-010-113-001. Compliance is required as indicated, unless already accomplished. (a) To prevent failure of the M/R drag brace assembly, P/N 214-010-113-001, on the Model 214ST helicopter, replace it with M/R drag' brace assembly, P/N 214-010-113-105, within the next 50 hours' time in service or within 30 days after the effective date of this AD, whichever comes first. (b) To prevent failure of the M/R drag brace assembly, P/N 214-010-113-001 on the Model 214B and 214B-1 helicopters, replace it with M/R drag brace assembly, P/N 214-010-113- 107, within the next 50 hours' time in service or within 30 days after the effective date of this AD, whichever comes first. (c) An alternate method of compliance which provides an equivalent level of safety with this AD may be used when approved by the Manager, Helicopter Certification Branch, Federal Aviation Administration, 4400 Blue Mound Road, Fort Worth, Texas 76106. This amendment becomes effective October 18, 1986. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_86-20-06.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 86-20-06 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; BELL HELICOPTER TEXTRON, INC. Model 214ST, 214B and 214B-1 Helicopters Subject: Main Rotor Drag Brace Assembly Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 10/18/1986 Make: Bell Helicopter Textron, Inc. Model: 214B | 214B-1 | 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: 86-20-06 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-5427 AD NUMBER: 86-20-06 SUBJECT HEADING: Airworthiness Directives; BELL HELICOPTER TEXTRON, INC. Model 214ST, 214B and 214B-1 Helicopters ACTION: SUMMARY: DATES: Effective October 18, 1986. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 86-20-06 BELL HELICOPTER TEXTRON, INC.: Amendment 39-5427. Applies to Bell Helicopter Textron, Inc., Model 214ST helicopters, S/N's 28101 through 28159, and Models 214B and 214B-1, S/N's 28001 through 28070, certificated in any category, equipped with main rotor drag brace assembly P/N 214-010-113-001. Compliance is required as indicated, unless already accomplished. (a) To prevent failure of the M/R drag brace assembly, P/N 214-010-113-001, on the Model 214ST helicopter, replace it with M/R drag' brace assembly, P/N 214-010-113-105, within the next 50 hours' time in service or within 30 days after the effective date of this AD, whichever comes first. (b) To prevent failure of the M/R drag brace assembly, P/N 214-010-113-001 on the Model 214B and 214B-1 helicopters, replace it with M/R drag brace assembly, P/N 214-010-113- 107, within the next 50 hours' time in service or within 30 days after the effective date of this AD, whichever comes first. (c) An alternate method of compliance which provides an equivalent level of safety with this AD may be used when approved by the Manager, Helicopter Certification Branch, Federal Aviation Administration, 4400 Blue Mound Road, Fort Worth, Texas 76106. This amendment becomes effective October 18, 1986. 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
2014-12-01 Recurring
final ruleAirworthiness Directives; Bell Helicopter Textron, Inc. (Bell) Helicopters
Unsafe Condition: A bearing with incorrect seal material, which could fail under extreme temperature or environmental conditions, resulting in loss of tail rotor control and subsequent loss of control of the helicop...
2013-19-05
final ruleAirworthiness Directives; Bell Helicopter Textron, Inc., Helicopters
Unsafe Condition: Failure of the pylon support spindle assembly due to cracks, corrosion, or damage leading to loss of control of the helicopter.
2013-06-51
final ruleAirworthiness Directives; Various Helicopter Models
Unsafe Condition: Failure of the overload clutch in Goodrich externally-mounted hoists, resulting in uncontrolled reeling-out of the cable and loss of load capacity.
2002-22-14
final ruleAirworthiness Directives; Bell Helicopter Textron, Inc. Model 204B, 205A, 205A-1, 205B, 212, 214B, and 214B-1 Helicopters
Unsafe Condition: Failure of a main rotor tension-torsion (TT) strap could lead to loss of a main rotor blade and subsequent loss of control of the helicopter.