AD 47-32-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Scotts-Bell 47 Inc | 47B | Airworthiness Directives; Bell Model 47B Airplanes |
Unsafe Condition
Failure of the 14ST pillow blocks 47-120-111-1 on the main rotor hub due to extreme misapplication of flight controls, which could lead to structural failure and loss of aircraft control.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace the 14ST pillow blocks with 4340 steel pillow blocks 47-120-111-5 and inspect the hub assembly per Bell Service Bulletin 47C45 (Revised). Update the Flight Manual 47B Series, Section II, paragraph 14B as referenced.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
before next flight
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Scotts-Bell 47 Inc Model 47B serial numbers 5, 8, 9, 10, 11, 12, 15, 16, 20, 21, 22, 24, 25, 26, 27, 30, 31, 35, 36, 37, 39, 41, 42, 43, 45, 51, and 52.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Rotor Hub Pillow Blocks
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_47-32-06.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 47-32-06 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Bell Model 47B Airplanes Subject: Rotor Hub Pillow Blocks Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Scotts-Bell 47 Inc Model: 47B Product Type: Aircraft Product Subtype: Rotorcraft Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 47-32-06 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 47-32-06 SUBJECT HEADING: Airworthiness Directives; Bell Model 47B Airplanes ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 47-32-06 BELL: (Was Mandatory Note 6 of AD-1H-1.) Applies Only to Model 47B Serial Numbers 5, 8, 9, 10, 11, 12, 15, 16, 20, 21, 22, 24, 25, 26, 27, 30, 31, 35, 36, 37, 39, 41, 42, 43, 45, 51 and 52. Compliance required before next flight. Replace the 14ST pillow blocks 47-120-111-1, on the main rotor hub, with 4340 steel pillow blocks, 47-120-111-5, and inspect the hub assembly in accordance with Bell Service Bulletin 47C45 (Revised) dated May 27, 1947. In order to avoid possible structural failure of pillow blocks if extreme misapplication of flight controls are applied, reference "Flight Manual" 47B Series, Section II, paragraph 14B. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_47-32-06.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 47-32-06 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Bell Model 47B Airplanes Subject: Rotor Hub Pillow Blocks Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Scotts-Bell 47 Inc Model: 47B 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: 47-32-06 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 47-32-06 SUBJECT HEADING: Airworthiness Directives; Bell Model 47B Airplanes ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 47-32-06 BELL: (Was Mandatory Note 6 of AD-1H-1.) Applies Only to Model 47B Serial Numbers 5, 8, 9, 10, 11, 12, 15, 16, 20, 21, 22, 24, 25, 26, 27, 30, 31, 35, 36, 37, 39, 41, 42, 43, 45, 51 and 52. Compliance required before next flight. Replace the 14ST pillow blocks 47-120-111-1, on the main rotor hub, with 4340 steel pillow blocks, 47-120-111-5, and inspect the hub assembly in accordance with Bell Service Bulletin 47C45 (Revised) dated May 27, 1947. In order to avoid possible structural failure of pillow blocks if extreme misapplication of flight controls are applied, reference "Flight Manual" 47B Series, Section II, paragraph 14B. 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
2023-11-07
final ruleAirworthiness Directives; Various Helicopters
Unsafe Condition: unsafe condition on these products.
2009-12-01
final ruleAirworthiness Directives; Bell Helicopter Textron, Inc. Model 47, 47B, 47B3, 47D, 47D1, 47E, 47G, 47G-2, 47G-2A, 47G-2A-1, 47G-3, 47G-3B, 47G-3B-1, 47G-3B-2, 47G-3B-2A, 47G-4, 47G-4A, 47G-5, 47G-5A, 47H-1, 47J, 47J-2, 47J-2A, and 47K Helicopters
Unsafe Condition: An incorrectly installed main rotor blade box beam clip (clip) could result in a main rotor blade spar crack, loss of a main rotor blade, and subsequent loss of control of the helicopter.
98-07-09
final ruleAirworthiness Directives; Bell Helicopter Textron, Inc. Model 47B, 47B-3, 47D, 47D-1, 47G, 47G-2, 47G-2A, 47G-2A-1, 47G-3, 47G-3B, 47G-3B-1, 47G-3B-2, 47G-3B-2A, 47G-4, 47G-4A, 47G-5, 47G-5A, 47H-1, 47J, 47J-2, 47J-2A, and 47K Helicopters
Unsafe Condition: Failure of the stabilizer bar damper link assembly due to separation of the damper link if the damper link rod end bushing loosens and exits the damper link rod end.
96-06-12
final ruleAirworthiness Directives; Bell Helicopter Textron, Inc. Model 47B, 47B-3, 47D, 47D-1, 47G, 47G-2, 47G-2A, 47G-2A-1, 47G-3, 47G-3B, 47G-3B-1, 47G-3B-2, 47G-3B-2A, 47G-4, 47G-4A, 47G-5, 47G-5A, 47H-1, 47J, 47J-2, 47J-2A, and 47-K Helicopters
Unsafe Condition: Inspect Tail Rotor Blade & Abrasion Strip