# AD 59-10-09: Turbine Blade

- Type: Airworthiness directive
- Status: Current
- Products: Pratt & Whitney Division JT3C-6
- Superseded by: Nothing supersedes this AD
- Product type: Engine
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/BC100697D97F70188625685B005DDD15.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/59-10-09

## The airworthiness directive

59-10-09 PRATT & WHITNEY: Applies to Following Turbo Wasp JT3C-6 Engines: JT3C-6 Engines Prior to Serial Numbers P630735B, Except P630406B Through P630413B, P630607B Through P630609B, P630614B Through P630618B, P630623B Through P630635B, and P630637B. JT3C-6 Engines Prior to Serial Numbers P630742D, Except P629708D, P630612D, P630315D, P630317D, P630319D Through P630325D, P630610D Through P630613D, P630619D Through P630622D, and P630636D.

Compliance required as indicated.

As a result of two third-stage turbine blade failures, it will be necessary to replace by 300 hours' of blade operating time, the P/N 271303 blade prior to change J-3 and P/N 371603 blade prior to change C-3. Third stage turbine blades P/N 271303, change J-3 and P/N 371603, change C-3, or later, do not require this replacement.

(P&W Service Bulletin, Chapter 72-8 dated April 3, 1959, of the Heavy Maintenance Manual, P/N 367069 covers this same subject.)

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS E-290](https://openairdocs.org/tcds/E-290): Pratt & Whitney Division; names 1 of 4 models: JT3C-6

## Registered aircraft it may apply to (OpenAirDocs)

No registered aircraft matched the models it names.

Its text cites no advisory circulars or STCs.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.