AD 76-12-01

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AD Number:
76-12-01
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
Airworthiness Directives; Bell Models 47B, 47B-3, 47D, 47D-1, 47G, 47G-2, and 47H-1 Helicopters
Subject:
Tail Rotor Hub Bolt
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
07/14/1976
Make:
Scotts-Bell 47 Inc
Model:
47B | 47B3 | 47D | 47D1 | 47G | 47G-2 | 47H-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Superseded AD: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Superseded By: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: 76-12-01
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:   39-2636

AD NUMBER:   76-12-01

SUBJECT HEADING:   Airworthiness Directives; Bell Models 47B, 47B-3, 47D, 47D-1, 47G, 47G-2, and 47H-1 Helicopters

ACTION:  

SUMMARY:  

DATES:   Effective July 14, 1976.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
76-12-01 BELL: Amendment 39-2636. Applies to Bell Models 47B, 47B-3, 47D, 47D-1, 47G, 47G-2, and 47H-1 helicopters certificated in all categories.

Compliance required within 300 hours' time in service after the effective date of this AD unless already accomplished.

To prevent possible fatigue failure of tail rotor hub bolt, Part Numbers 47-641-052-3 or - 5, accomplish the following:

(a) Remove and disassemble the tail rotor hub and blade assembly.

(b) Remove the metal grease seal from each tail rotor blade grip and install the seal, Part Number 47-641-042-3, in each blade grip to clear the head of the hub bolt.

(c) Remove the hub assembly bolts, Part Numbers 47-641-052-3 or -5, from the tail rotor hub assembly. Install hub bolts, Part Number 47-641-194-1, in the tail rotor hub as specified in paragraph 6-16.e., Section IV, Models 47D-1, 47G, and 47G-2 Maintenance and Overhaul Instruction Manual, as revised August 15, 1961, or as specified by equivalent FAA approved procedures.

(d) Assemble and track and balance the tail rotor hub and blade assembly as specified in the pertinent Model Maintenance and Overhaul Instruction Manual or as specified in FAA approved equivalent procedures.

(e) Compliance with Bell Helicopter Company Service Bulletin No. 47-76-1 dated January 5, 1976, or later approved revision fulfills compliance with this AD.

This amendment becomes effective July 14, 1976.

FOOTER: