AD 75-18-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bell Helicopter Textron Canada Limited | 206A | Airworthiness Directives; Bell Models 206A, 206B, 206A-1, and 206B-1 Helicopters |
| aircraft | Bell Helicopter Textron Canada Limited | 206A-1 (OH-58A) | Airworthiness Directives; Bell Models 206A, 206B, 206A-1, and 206B-1 Helicopters |
| aircraft | Bell Helicopter Textron Canada Limited | 206B | Airworthiness Directives; Bell Models 206A, 206B, 206A-1, and 206B-1 Helicopters |
| aircraft | Bell Helicopter Textron Canada Limited | 206B-1 | Airworthiness Directives; Bell Models 206A, 206B, 206A-1, and 206B-1 Helicopters |
Unsafe Condition
Loss of attaching bolt torque for the main rotor blade hub pillow blocks.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove the four nuts, bolts, washers (P/N 206-010-171-1), and bushings (P/N 206-010-170-1) attaching the pillow block assemblies to the main rotor yoke. Install flanged bushings (P/N 206-011-128-1) into the pillow blocks with flanges facing outboard, secure with nuts, bolts, and washers, and torque to 60 inch pounds plus drag torque of the self-locking nut.
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Compliance Time
within 600 hours' time in service after the effective date of this AD
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Affected Aircraft
Bell Models 206A, 206B, 206A-1, and 206B-1 helicopters certificated in all categories.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Rotor Blade Pillow Block Assemblies
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_75-18-07.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 75-18-07 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Bell Models 206A, 206B, 206A-1, and 206B-1 Helicopters Subject: Rotor Blade Pillow Block Assemblies Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 09/19/1975 Make: Bell Helicopter Textron Canada Limited Model: 206A | 206A-1 (OH-58A) | 206B | 206B-1 Product Type: Aircraft Product Subtype: Rotorcraft Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 75-18-07 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2346 AD NUMBER: 75-18-07 SUBJECT HEADING: Airworthiness Directives; Bell Models 206A, 206B, 206A-1, and 206B-1 Helicopters ACTION: SUMMARY: DATES: Effective September 19, 1975. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 75-18-07 BELL: Amendment 39-2346. Applies to Bell Models 206A, 206B, 206A-1, and 206B-1 helicopters certificated in all categories. Compliance required within 600 hours' time in service after the effective date of this AD, unless already accomplished. To prevent loss of attaching bolt torque for the main rotor blade hub pillow blocks, accomplish the following: (a) Remove the four nuts and bolts that attach the pillow block assemblies to the main rotor yoke and remove the washers, P/N 206-010-171-1, and bushings, P/N 206-010- 170-1. (b) Install four flanged bushings, P/N 206-011-128-1, into the pillow blocks with the flanges facing outboard. Secure the pillow blocks to the yoke with appropriate nuts and bolts, with a washer under each nut, and torque the nut and bolt 60 inch pounds, plus drag (tare) torque of the self-locking nut. (Note: Compliance with items 1, 2, and 3 of Bell Service Bulletin No. 206-75-3, dated May 1, 1975, or later FAA approved revision, will constitute compliance with the requirements of this AD.) This amendment becomes effective September 19, 1975. FOOTER:
Document Text
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AD Final Rules - DRS_75-18-07.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 75-18-07 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Bell Models 206A, 206B, 206A-1, and 206B-1 Helicopters Subject: Rotor Blade Pillow Block Assemblies Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 09/19/1975 Make: Bell Helicopter Textron Canada Limited Model: 206A | 206A-1 (OH-58A) | 206B | 206B-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: AIRWORTHINESS DIRECTIVES FINAL RULES: 75-18-07 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2346 AD NUMBER: 75-18-07 SUBJECT HEADING: Airworthiness Directives; Bell Models 206A, 206B, 206A-1, and 206B-1 Helicopters ACTION: SUMMARY: DATES: Effective September 19, 1975. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 75-18-07 BELL: Amendment 39-2346. Applies to Bell Models 206A, 206B, 206A-1, and 206B-1 helicopters certificated in all categories. Compliance required within 600 hours' time in service after the effective date of this AD, unless already accomplished. To prevent loss of attaching bolt torque for the main rotor blade hub pillow blocks, accomplish the following: (a) Remove the four nuts and bolts that attach the pillow block assemblies to the main rotor yoke and remove the washers, P/N 206-010-171-1, and bushings, P/N 206-010- 170-1. (b) Install four flanged bushings, P/N 206-011-128-1, into the pillow blocks with the flanges facing outboard. Secure the pillow blocks to the yoke with appropriate nuts and bolts, with a washer under each nut, and torque the nut and bolt 60 inch pounds, plus drag (tare) torque of the self-locking nut. (Note: Compliance with items 1, 2, and 3 of Bell Service Bulletin No. 206-75-3, dated May 1, 1975, or later FAA approved revision, will constitute compliance with the requirements of this AD.) This amendment becomes effective September 19, 1975. FOOTER:
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Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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