AD 59-10-09
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Pratt & Whitney Division | JT3C-6 | PRATT & WHITNEY Model Wasp JT3C-6 Engines |
Unsafe Condition
Third-stage turbine blade failures due to use of P/N 271303 blades prior to change J-3 and P/N 371603 blades prior to change C-3.
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Required Actions
Replace P/N 271303 blades prior to change J-3 and P/N 371603 blades prior to change C-3 within 300 hours of blade operating time. Blades with P/N 271303 change J-3 or later and P/N 371603 change C-3 or later do not require replacement.
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Compliance Time
within 300 hours of blade operating time
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Affected Aircraft
Pratt & Whitney Model Wasp JT3C-6 Engines prior to serial numbers P630735B (excluding specified ranges) and P630742D (excluding specified serial numbers)
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Federal Register Abstract
Turbine Blade
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_59-10-09.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 59-10-09 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: PRATT & WHITNEY Model Wasp JT3C-6 Engines Subject: Turbine Blade Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Pratt & Whitney Division Model: JT3C-6 Product Type: Engine Product Subtype: Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 59-10-09 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 59-10-09 SUBJECT HEADING: PRATT & WHITNEY Model Wasp JT3C-6 Engines ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 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.) FOOTER:
Document Text
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AD Final Rules - DRS_59-10-09.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 59-10-09 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: PRATT & WHITNEY Model Wasp JT3C-6 Engines Subject: Turbine Blade Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Pratt & Whitney Division Model: JT3C-6 Product Type: Engine Product Subtype: Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 59-10-09 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 59-10-09 SUBJECT HEADING: PRATT & WHITNEY Model Wasp JT3C-6 Engines ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 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.) FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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