AD 85-15-04

final rule

Airworthiness Directives; BELL HELICOPTER TEXTRON, INC., HAWKEYE ROTOR AND WING, TEXAS HELICOPTER CORPORATION Model 47B, 47B3, 47D, 47D1, 47E, 47G, 47H-1, 47G-3, and U.S. Army OH-13E Helicopters

AD Number
85-15-04
Status
final_rule
Effective Date
Product Category
aircraft
Docket
Unknown
FR Citation
This information is not available.
Technical illustration of a helicopter rotor hub assembly
Problem area Rotor system

Applicability

TypeManufacturerModelDetails
aircraft Scotts-Bell 47 Inc | Isenberg, Wilbur M. | McCreary, Gifton 47B Airworthiness Directives; BELL HELICOPTER TEXTRON, INC., HAWKEYE ROTOR AND WING, TEXAS HELICOPTER CORPORATION Model 47B, 47B3, 47D, 47D1, 47E, 47G, 47H-1, 47G-3, and U.S. Army OH-13E Helicopters
aircraft Scotts-Bell 47 Inc | Isenberg, Wilbur M. | McCreary, Gifton 47B3 Airworthiness Directives; BELL HELICOPTER TEXTRON, INC., HAWKEYE ROTOR AND WING, TEXAS HELICOPTER CORPORATION Model 47B, 47B3, 47D, 47D1, 47E, 47G, 47H-1, 47G-3, and U.S. Army OH-13E Helicopters
aircraft Scotts-Bell 47 Inc | Isenberg, Wilbur M. | McCreary, Gifton 47D Airworthiness Directives; BELL HELICOPTER TEXTRON, INC., HAWKEYE ROTOR AND WING, TEXAS HELICOPTER CORPORATION Model 47B, 47B3, 47D, 47D1, 47E, 47G, 47H-1, 47G-3, and U.S. Army OH-13E Helicopters
aircraft Scotts-Bell 47 Inc | Isenberg, Wilbur M. | McCreary, Gifton 47D1 Airworthiness Directives; BELL HELICOPTER TEXTRON, INC., HAWKEYE ROTOR AND WING, TEXAS HELICOPTER CORPORATION Model 47B, 47B3, 47D, 47D1, 47E, 47G, 47H-1, 47G-3, and U.S. Army OH-13E Helicopters
aircraft Scotts-Bell 47 Inc | Isenberg, Wilbur M. | McCreary, Gifton 47E Airworthiness Directives; BELL HELICOPTER TEXTRON, INC., HAWKEYE ROTOR AND WING, TEXAS HELICOPTER CORPORATION Model 47B, 47B3, 47D, 47D1, 47E, 47G, 47H-1, 47G-3, and U.S. Army OH-13E Helicopters
aircraft Scotts-Bell 47 Inc | Isenberg, Wilbur M. | McCreary, Gifton 47G Airworthiness Directives; BELL HELICOPTER TEXTRON, INC., HAWKEYE ROTOR AND WING, TEXAS HELICOPTER CORPORATION Model 47B, 47B3, 47D, 47D1, 47E, 47G, 47H-1, 47G-3, and U.S. Army OH-13E Helicopters
aircraft Scotts-Bell 47 Inc | Isenberg, Wilbur M. | McCreary, Gifton 47G-3 Airworthiness Directives; BELL HELICOPTER TEXTRON, INC., HAWKEYE ROTOR AND WING, TEXAS HELICOPTER CORPORATION Model 47B, 47B3, 47D, 47D1, 47E, 47G, 47H-1, 47G-3, and U.S. Army OH-13E Helicopters
aircraft Scotts-Bell 47 Inc | Isenberg, Wilbur M. | McCreary, Gifton 47H-1 Airworthiness Directives; BELL HELICOPTER TEXTRON, INC., HAWKEYE ROTOR AND WING, TEXAS HELICOPTER CORPORATION Model 47B, 47B3, 47D, 47D1, 47E, 47G, 47H-1, 47G-3, and U.S. Army OH-13E Helicopters
aircraft Scotts-Bell 47 Inc | Isenberg, Wilbur M. | McCreary, Gifton OH-13E Airworthiness Directives; BELL HELICOPTER TEXTRON, INC., HAWKEYE ROTOR AND WING, TEXAS HELICOPTER CORPORATION Model 47B, 47B3, 47D, 47D1, 47E, 47G, 47H-1, 47G-3, and U.S. Army OH-13E Helicopters

Unsafe Condition

Failure of the tail rotor blade yoke P/N 74-641-057-9.

AI-generated summary from the source AD text. Verify against the official source before acting.

Required Actions

Remove from service Texas Helicopter Corporation tail rotor blade yoke P/N 74-641-057-9 within the next 10 hours time in service after the effective date of this AD. Equivalent methods of compliance may be used when approved by the FAA.

AI-generated summary from the source AD text. Verify against the official source before acting.

Compliance Time

within the next 10 hours time in service after the effective date of this AD

AI-generated summary from the source AD text. Verify against the official source before acting.

Affected Aircraft

Model 47B, 47B3, 47D, 47D1, 47E, 47G, 47H-1, 47G-3, U.S. Army OH-13E helicopters equipped with tail rotor blade yoke P/N 74-641-057-9.

AI-generated summary from the source AD text. Verify against the official source before acting.

Federal Register Abstract

Tail Rotor Blade Yolk P/N 74-641-057-9

Applicability Source Text

Show captured applicability text from the source AD
AD Final Rules - DRS_85-15-04.html
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AD Number:
85-15-04
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
Airworthiness Directives; BELL HELICOPTER TEXTRON, INC., HAWKEYE ROTOR AND WING, TEXAS HELICOPTER CO...Show more
Subject:
Tail Rotor Blade Yolk P/N 74-641-057-9
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
01/08/1986
Make:
Scotts-Bell 47 Inc | Isenberg, Wilbur M. | McCreary, Gifton
Model:
47B | 47B3 | 47D | 47D1 | 47E | 47G | 47G-3 | 47H-1 | OH-13E
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: 85-15-04
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:   39-5186

AD NUMBER:   85-15-04

SUBJECT HEADING:   Airworthiness Directives; BELL HELICOPTER TEXTRON, INC., HAWKEYE ROTOR AND WING, TEXAS HELICOPTER CORPORATION Model 47B, 47B3, 47D, 47D1, 47E, 47G, 47H-1, 47G-3, and U.S. Army OH-13E Helicopters

ACTION:  

SUMMARY:  

DATES:   Effective January 8, 1986.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
85-15-04 BELL HELICOPTER TEXTRON, INC., HAWKEYE ROTOR AND WING, TEXAS HELICOPTER CORPORATION: Amendment 39-5186. Applies to Model 47B, 47B3, 47D, 47D1, 47E, 47G, 47H-1, 47G-3, U.S. Army Model OH-13E helicopters certified in any category and other helicopters equipped with tail rotor blade yoke P/N 74-641- 057-9.

Compliance is required as indicated, unless already accomplished.

To prevent the failure of the tail rotor blade yoke, accomplish the following:

a. Within the next 10 hours time in service after the effective date of this AD, remove from service Texas Helicopter Corporation tail rotor blade yoke P/N 74-641-057-9.

b. Any equivalent method of compliance with this AD which provides an equivalent level of safety may be used when approved by the Manager, Helicopter Certification Branch, Federal Aviation Administration, 4400 Blue Mound Road, Fort Worth, Texas 76106.

c. In accordance with FAR Sections 21.197 and 21.199, flight is permitted to a base where the replacement required by this AD may be accomplished.

This amendment becomes effective January 8, 1986, as to all persons except those to whom it was made immediately effective by priority letter AD 85-15-04, issued July 23, 1985, which contained this amendment.

FOOTER:

Document Text

Show stored source text (verify against official source)
AD Final Rules - DRS_85-15-04.html
Copy URL
Print/Save as PDF
Document Versions
 Feedback
Details
AD Number:
85-15-04
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
Airworthiness Directives; BELL HELICOPTER TEXTRON, INC., HAWKEYE ROTOR AND WING, TEXAS HELICOPTER CO...Show more
Subject:
Tail Rotor Blade Yolk P/N 74-641-057-9
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
01/08/1986
Make:
Scotts-Bell 47 Inc | Isenberg, Wilbur M. | McCreary, Gifton
Model:
47B | 47B3 | 47D | 47D1 | 47E | 47G | 47G-3 | 47H-1 | OH-13E
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: 85-15-04
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:   39-5186

AD NUMBER:   85-15-04

SUBJECT HEADING:   Airworthiness Directives; BELL HELICOPTER TEXTRON, INC., HAWKEYE ROTOR AND WING, TEXAS HELICOPTER CORPORATION Model 47B, 47B3, 47D, 47D1, 47E, 47G, 47H-1, 47G-3, and U.S. Army OH-13E Helicopters

ACTION:  

SUMMARY:  

DATES:   Effective January 8, 1986.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
85-15-04 BELL HELICOPTER TEXTRON, INC., HAWKEYE ROTOR AND WING, TEXAS HELICOPTER CORPORATION: Amendment 39-5186. Applies to Model 47B, 47B3, 47D, 47D1, 47E, 47G, 47H-1, 47G-3, U.S. Army Model OH-13E helicopters certified in any category and other helicopters equipped with tail rotor blade yoke P/N 74-641- 057-9.

Compliance is required as indicated, unless already accomplished.

To prevent the failure of the tail rotor blade yoke, accomplish the following:

a. Within the next 10 hours time in service after the effective date of this AD, remove from service Texas Helicopter Corporation tail rotor blade yoke P/N 74-641-057-9.

b. Any equivalent method of compliance with this AD which provides an equivalent level of safety may be used when approved by the Manager, Helicopter Certification Branch, Federal Aviation Administration, 4400 Blue Mound Road, Fort Worth, Texas 76106.

c. In accordance with FAR Sections 21.197 and 21.199, flight is permitted to a base where the replacement required by this AD may be accomplished.

This amendment becomes effective January 8, 1986, as to all persons except those to whom it was made immediately effective by priority letter AD 85-15-04, issued July 23, 1985, which contained this amendment.

FOOTER:

Source: Official FAA Source ↗

Retrieved: Apr 8, 2026

Rights: U.S. Government Public Domain

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