AD 86-17-10
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bell Helicopter Textron, Inc. | 205A | Airworthiness Directives; BELL HELICOPTER TEXTRON, INC. Helicopter Models 205 and 205A-1 Helicopters |
| aircraft | Bell Helicopter Textron, Inc. | 205A-1 | Airworthiness Directives; BELL HELICOPTER TEXTRON, INC. Helicopter Models 205 and 205A-1 Helicopters |
Unsafe Condition
Failure of the tail rotor control due to cracks in the T/R trunnion housing or axial play in the T/R trunnion, or presence of excess balance washers.
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Required Actions
Within 25 hours' time in service after receipt, visually inspect the T/R hub assembly per Bell ASB 205-86-24. If cracks, axial play, or excess washers exist, comply with Part II of the ASB before further flight. Repeat inspection every 25 hours until part (b) is done. Remove and inspect the T/R hub and blade assembly within 150 hours' time in service or 60 days after AD issue, whichever comes first, replacing housings with end web thickness ≤0.059 inch.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 25 hours' time in service after receipt for initial inspection; within 150 hours' time in service or 60 days after AD issue date for part (b), whichever occurs first.
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Affected Aircraft
Bell Helicopter Textron, Inc. Models 205 and 205A-1 helicopters with retrofit kit P/N 212-704-129-101 installed.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
T/R Hub Assembly (See 90-03-09)
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_86-17-10.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 86-17-10 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; BELL HELICOPTER TEXTRON, INC. Helicopter Models 205 and 205A-1 Helicopters Subject: T/R Hub Assembly (See 90-03-09) Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Bell Helicopter Textron, Inc. Model: 205A | 205A-1 Product Type: Aircraft Product Subtype: Rotorcraft Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: Updated RGL applicability to match AD applicability; CAR C-11-185 AIRWORTHINESS DIRECTIVES FINAL RULES: 86-17-10 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 86-17-10 SUBJECT HEADING: Airworthiness Directives; BELL HELICOPTER TEXTRON, INC. Helicopter Models 205 and 205A-1 Helicopters ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 86-17-10 BELL HELICOPTER TEXTRON, INC.: Letter issued August 21, 1986. Applies to all Bell Helicopter Models 205 and 205A-1 helicopters, which have retrofit kit, P/N 212-704-129-101, installed (reference Bell Service Instructions (S.I.)) 212-68, May 29, 1981, certified in any category. Compliance required as indicated unless already accomplished. To prevent failure of the tail rotor control, accomplish the following: (a) Within 25 hours' time in service after receipt of this AD, visually inspect the T/R hub assembly P/N 212-011-701-3, in accordance with Part I of Bell Helicopter Textron, Inc. (BHTI), Alert Service Bulletin (ASB) 205-86-24, Revision "A," dated July 23, 1986. (1) If the (P/N) 212-011-716-1 T/R trunnion housing is cracked or there is axial play in the T/R trunnion, or if there are excess balance washers, comply with Part II of the Alert Service Bulletin before further flight. (2) Repeat this inspection every 25 hours' time in service until paragraph (b) of this AD is accomplished. (b) Remove the 212-011-701-1 T/R hub and blade assembly and inspect the trunnion bearing housing, P/N 212-011-716-1, as detailed in Part II of BHTI ASB 205-86-24, Revision "A," dated July 23, 1986, within 150 hours' time in service or within 60 days after the issue date of this AD, whichever occurs first. Replace any housing having an end web thickness of .059 inch or less with a serviceable part. An alternate method of compliance or adjustment of the compliance time, which provides an equivalent level of safety, may be approved by the Manager, Helicopter Certification Branch, Aircraft Certification Division, FAA, Southwest Region. This airworthiness directive becomes effective upon receipt. FOOTER:
Document Text
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AD Final Rules - DRS_86-17-10.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 86-17-10 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; BELL HELICOPTER TEXTRON, INC. Helicopter Models 205 and 205A-1 Helicopters Subject: T/R Hub Assembly (See 90-03-09) Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Bell Helicopter Textron, Inc. Model: 205A | 205A-1 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: Updated RGL applicability to match AD applicability; CAR C-11-185 AIRWORTHINESS DIRECTIVES FINAL RULES: 86-17-10 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 86-17-10 SUBJECT HEADING: Airworthiness Directives; BELL HELICOPTER TEXTRON, INC. Helicopter Models 205 and 205A-1 Helicopters ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 86-17-10 BELL HELICOPTER TEXTRON, INC.: Letter issued August 21, 1986. Applies to all Bell Helicopter Models 205 and 205A-1 helicopters, which have retrofit kit, P/N 212-704-129-101, installed (reference Bell Service Instructions (S.I.)) 212-68, May 29, 1981, certified in any category. Compliance required as indicated unless already accomplished. To prevent failure of the tail rotor control, accomplish the following: (a) Within 25 hours' time in service after receipt of this AD, visually inspect the T/R hub assembly P/N 212-011-701-3, in accordance with Part I of Bell Helicopter Textron, Inc. (BHTI), Alert Service Bulletin (ASB) 205-86-24, Revision "A," dated July 23, 1986. (1) If the (P/N) 212-011-716-1 T/R trunnion housing is cracked or there is axial play in the T/R trunnion, or if there are excess balance washers, comply with Part II of the Alert Service Bulletin before further flight. (2) Repeat this inspection every 25 hours' time in service until paragraph (b) of this AD is accomplished. (b) Remove the 212-011-701-1 T/R hub and blade assembly and inspect the trunnion bearing housing, P/N 212-011-716-1, as detailed in Part II of BHTI ASB 205-86-24, Revision "A," dated July 23, 1986, within 150 hours' time in service or within 60 days after the issue date of this AD, whichever occurs first. Replace any housing having an end web thickness of .059 inch or less with a serviceable part. An alternate method of compliance or adjustment of the compliance time, which provides an equivalent level of safety, may be approved by the Manager, Helicopter Certification Branch, Aircraft Certification Division, FAA, Southwest Region. 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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