AD 56-25-02

final rule
Data completeness: 60%

Airworthiness Directives; Bell Model 47 Series Helicopters

AD Number
56-25-02
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 Model 47 Series Helicopters
aircraft Scotts-Bell 47 Inc 47B Airworthiness Directives; Bell Model 47 Series Helicopters
aircraft Scotts-Bell 47 Inc 47B3 Airworthiness Directives; Bell Model 47 Series Helicopters
aircraft Scotts-Bell 47 Inc 47D Airworthiness Directives; Bell Model 47 Series Helicopters
aircraft Scotts-Bell 47 Inc 47D1 Airworthiness Directives; Bell Model 47 Series Helicopters
aircraft Scotts-Bell 47 Inc 47E Airworthiness Directives; Bell Model 47 Series Helicopters
aircraft Scotts-Bell 47 Inc 47G Airworthiness Directives; Bell Model 47 Series Helicopters
aircraft Scotts-Bell 47 Inc 47G-2 Airworthiness Directives; Bell Model 47 Series Helicopters
aircraft Scotts-Bell 47 Inc 47G-2A Airworthiness Directives; Bell Model 47 Series Helicopters
aircraft Scotts-Bell 47 Inc 47G-2A-1 Airworthiness Directives; Bell Model 47 Series Helicopters

Unsafe Condition

Excessive tolerance resulting from wear of the tail rotor pitch change rod assembly can result in the loss of the S1RP or 7R4AX1C bearings.

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

Required Actions

Replace AN 960-416 washers or washers P/N 47-641-113-1 with washers having an O.D. dimension not greater than 0.552 inch or less than 0.549 inch.

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

Compliance Time

Compliance required by December 22, 1956.

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

Affected Aircraft

All Model 47 Series Helicopters Except the Following: Model 47G Serial Numbers 1529, 1530, 1687 and Up; Model 47G2 Serial Numbers 1505, 1506, 1508, 1617 and Up; Model 47H1 Serial Numbers 1369, 1371 and Up; Model 47J.

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

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