AD 80-19-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Pratt & Whitney Division | JT3D-1-MC7 | PRATT & WHITNEY AIRCRAFT Model JT3D-1-MC7 Engines |
Unsafe Condition
High cycle fatigue cracking of fifth stage compressor disks (P/N 426505) which could result in disk fracture.
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Required Actions
Retire from service all fifth stage compressor disks P/N 426505 and replace with either disk P/N 697105 or P/N 749605.
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Compliance Time
not later than December 31, 1980
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Affected Aircraft
Pratt & Whitney Aircraft JT3D-1-MC7 turbofan engine models
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Federal Register Abstract
Fifth Stage Compressor Disks
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_80-19-03.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 80-19-03 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: PRATT & WHITNEY AIRCRAFT Model JT3D-1-MC7 Engines Subject: Fifth Stage Compressor Disks Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 10/07/1980 Make: Pratt & Whitney Division Model: JT3D-1-MC7 Product Type: Engine Product Subtype: Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 80-19-03 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-3911 AD NUMBER: 80-19-03 SUBJECT HEADING: PRATT & WHITNEY AIRCRAFT Model JT3D-1-MC7 Engines ACTION: SUMMARY: DATES: Effective October 7, 1980. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 80-19-03 PRATT & WHITNEY AIRCRAFT: Amendment 39-3911. Applies to all Pratt & Whitney Aircraft JT3D-1-MC7 turbofan engine models. Compliance required not later than December 31, 1980. To preclude high cycle fatigue cracking of fifth stage compressor disks which could result in disk fracture, retire from service all fifth stage compressor disks, P/N 426505, and replace with either disk P/N 697105 or P/N 749605. Upon submission of substantiating data, through an FAA Aviation Safety Inspector, the Chief, Engineering and Manufacturing Branch, New England Region, may adjust the compliance date. A historical file on this AD is maintained in full by the FAA at its headquarters in Washington, D.C., and at the New England Region. This amendment becomes effective October 7, 1980. FOOTER:
Document Text
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AD Final Rules - DRS_80-19-03.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 80-19-03 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: PRATT & WHITNEY AIRCRAFT Model JT3D-1-MC7 Engines Subject: Fifth Stage Compressor Disks Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 10/07/1980 Make: Pratt & Whitney Division Model: JT3D-1-MC7 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: 80-19-03 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-3911 AD NUMBER: 80-19-03 SUBJECT HEADING: PRATT & WHITNEY AIRCRAFT Model JT3D-1-MC7 Engines ACTION: SUMMARY: DATES: Effective October 7, 1980. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 80-19-03 PRATT & WHITNEY AIRCRAFT: Amendment 39-3911. Applies to all Pratt & Whitney Aircraft JT3D-1-MC7 turbofan engine models. Compliance required not later than December 31, 1980. To preclude high cycle fatigue cracking of fifth stage compressor disks which could result in disk fracture, retire from service all fifth stage compressor disks, P/N 426505, and replace with either disk P/N 697105 or P/N 749605. Upon submission of substantiating data, through an FAA Aviation Safety Inspector, the Chief, Engineering and Manufacturing Branch, New England Region, may adjust the compliance date. A historical file on this AD is maintained in full by the FAA at its headquarters in Washington, D.C., and at the New England Region. This amendment becomes effective October 7, 1980. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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