AD 52-28-03

final rule
Data completeness: 60%

Airworthiness Directives; Bell 47 Series Helicopters

AD Number
52-28-03
Status
final_rule
Effective Date
Product Category
aircraft
Docket
Unknown
FR Citation
This information is not available.

Applicability

TypeManufacturerModelDetails
aircraft Scotts-Bell 47 Inc 47 Airworthiness Directives; Bell 47 Series Helicopters
aircraft Scotts-Bell 47 Inc 47B Airworthiness Directives; Bell 47 Series Helicopters
aircraft Scotts-Bell 47 Inc 47B3 Airworthiness Directives; Bell 47 Series Helicopters
aircraft Scotts-Bell 47 Inc 47D Airworthiness Directives; Bell 47 Series Helicopters
aircraft Scotts-Bell 47 Inc 47D1 Airworthiness Directives; Bell 47 Series Helicopters
aircraft Scotts-Bell 47 Inc 47E Airworthiness Directives; Bell 47 Series Helicopters
aircraft Scotts-Bell 47 Inc 47G Airworthiness Directives; Bell 47 Series Helicopters
aircraft Scotts-Bell 47 Inc 47G-2 Airworthiness Directives; Bell 47 Series Helicopters
aircraft Scotts-Bell 47 Inc 47G-2A Airworthiness Directives; Bell 47 Series Helicopters
aircraft Scotts-Bell 47 Inc 47G-2A-1 Airworthiness Directives; Bell 47 Series Helicopters

Unsafe Condition

Tail rotor gearbox shaft, P/N 47-645-077-1, may fail after accumulating 900 hours of operation.

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

Required Actions

Replace the tail rotor gearbox shaft, P/N 47-645-077-1, when it has accumulated 900 hours of operation.

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

Compliance Time

Compliance required as directed.

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

Affected Aircraft

Scotts-Bell 47 Inc 47, 47B, 47B3, 47D, 47D1, 47E, 47G, 47G-2, 47G-2A, 47G-2A-1, 47G-3, 47G-3B, 47G-3B-1, and other 47 Series models with the 47-645-002 Gearbox installed.

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

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.

View Official Source ↗ Find More ADs for Scotts-Bell 47 Inc 47

Related Airworthiness Directives

98-07-09

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Airworthiness 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

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96-06-12

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Airworthiness 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

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Effective: May 29, 1996 Category: aircraft

91-20-10

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Airworthiness Directives; BELL HELICOPTER TEXTRON, INC. Model 47G2, 47G2A, 47G2A1, 47G3, 47G3B1, 47G3B2, 47G3B2A, 47G4, 47G4A, 47G5, 47G5A, 47J, 47J2, and 47J2A Helicopters

Unsafe Condition: Main Rotor Grip

Effective: Nov 14, 1991 Category: aircraft

85-15-04

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

Effective: Jan 8, 1986 Category: aircraft

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