AD 75-13-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Pratt & Whitney Division | TF33-P-7 | PRATT & WHITNEY AIRCRAFT Models TF33-P-7 and TF33-P-7A Engines |
| engine | Pratt & Whitney Division | TF33-P-7A | PRATT & WHITNEY AIRCRAFT Models TF33-P-7 and TF33-P-7A Engines |
Unsafe Condition
The thirteenth, fourteenth, fifteenth, and sixteenth stage compressor disks (P/N 657913, 657914, 657915, 657916) may exceed their revised life limits, leading to potential disk failure.
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Required Actions
Remove from service the specified compressor disks prior to exceeding the revised life limit of 8,500 cycles. The previous life limit of 15,000 cycles has been reduced.
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Compliance Time
prior to exceeding the revised life limit listed below
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Affected Aircraft
Pratt & Whitney Aircraft TF33-P-7 and TF33-P-7A engines containing thirteenth stage compressor disk P/N 657913, fourteenth stage compressor disk P/N 657914, fifteenth stage compressor disk P/N 657915, and sixteenth stage compressor disk P/N 657916.
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Federal Register Abstract
Compressor Disks
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_75-13-04.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 75-13-04 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: PRATT & WHITNEY AIRCRAFT Models TF33-P-7 and TF33-P-7A Engines Subject: Compressor Disks Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 07/03/1975 Make: Pratt & Whitney Division Model: TF33-P-7 | TF33-P-7A Product Type: Engine Product Subtype: Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 75-13-04 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2244 AD NUMBER: 75-13-04 SUBJECT HEADING: PRATT & WHITNEY AIRCRAFT Models TF33-P-7 and TF33-P-7A Engines ACTION: SUMMARY: DATES: Effective July 3, 1975. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 75-13-04 PRATT & WHITNEY AIRCRAFT: Amendment 39-2244. Applies to all Pratt & Whitney Aircraft TF33-P-7 and TF33-P-7A turbofan engines containing thirteenth stage compressor disk, P/N 657913, fourteenth stage compressor disk, P/N 657914, fifteenth stage compressor disk, P/N 657915, and sixteenth stage compressor disk, P/N 657916. To ensure adequate life limit margin, remove from service thirteenth, fourteenth, fifteenth, and sixteenth stage compressor disks prior to exceeding the revised life limit listed below. Disk Part Number Previous Life Limit (Cycles) Revised Life Limit (Cycles) 657913 15,000 8,500 657914 15,000 8,500 657915 15,000 8,500 657916 15,000 8,500 This amendment becomes effective July 3, 1975. FOOTER:
Document Text
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AD Final Rules - DRS_75-13-04.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 75-13-04 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: PRATT & WHITNEY AIRCRAFT Models TF33-P-7 and TF33-P-7A Engines Subject: Compressor Disks Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 07/03/1975 Make: Pratt & Whitney Division Model: TF33-P-7 | TF33-P-7A 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: 75-13-04 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2244 AD NUMBER: 75-13-04 SUBJECT HEADING: PRATT & WHITNEY AIRCRAFT Models TF33-P-7 and TF33-P-7A Engines ACTION: SUMMARY: DATES: Effective July 3, 1975. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 75-13-04 PRATT & WHITNEY AIRCRAFT: Amendment 39-2244. Applies to all Pratt & Whitney Aircraft TF33-P-7 and TF33-P-7A turbofan engines containing thirteenth stage compressor disk, P/N 657913, fourteenth stage compressor disk, P/N 657914, fifteenth stage compressor disk, P/N 657915, and sixteenth stage compressor disk, P/N 657916. To ensure adequate life limit margin, remove from service thirteenth, fourteenth, fifteenth, and sixteenth stage compressor disks prior to exceeding the revised life limit listed below. Disk Part Number Previous Life Limit (Cycles) Revised Life Limit (Cycles) 657913 15,000 8,500 657914 15,000 8,500 657915 15,000 8,500 657916 15,000 8,500 This amendment becomes effective July 3, 1975. FOOTER:
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Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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