AD 67-01-02
final rule
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | General Electric Company | CT58-100-1 | GENERAL ELECTRIC Model CT58-100-1, CT58-100-2, CT58-110-1, CT58-110-2, CT58-140-1, CT58-140-2, Military T58-GE-1 and T58-GE-5 Engines |
| engine | General Electric Company | T58-GE-5 | GENERAL ELECTRIC Model CT58-100-1, CT58-100-2, CT58-110-1, CT58-110-2, CT58-140-1, CT58-140-2, Military T58-GE-1 and T58-GE-5 Engines |
| engine | General Electric Company | T58-GE-1 | GENERAL ELECTRIC Model CT58-100-1, CT58-100-2, CT58-110-1, CT58-110-2, CT58-140-1, CT58-140-2, Military T58-GE-1 and T58-GE-5 Engines |
| engine | General Electric Company | CT58-100-2 | GENERAL ELECTRIC Model CT58-100-1, CT58-100-2, CT58-110-1, CT58-110-2, CT58-140-1, CT58-140-2, Military T58-GE-1 and T58-GE-5 Engines |
| engine | General Electric Company | CT58-110-1 | GENERAL ELECTRIC Model CT58-100-1, CT58-100-2, CT58-110-1, CT58-110-2, CT58-140-1, CT58-140-2, Military T58-GE-1 and T58-GE-5 Engines |
| engine | General Electric Company | CT58-110-2 | GENERAL ELECTRIC Model CT58-100-1, CT58-100-2, CT58-110-1, CT58-110-2, CT58-140-1, CT58-140-2, Military T58-GE-1 and T58-GE-5 Engines |
| engine | General Electric Company | CT58-140-1 | GENERAL ELECTRIC Model CT58-100-1, CT58-100-2, CT58-110-1, CT58-110-2, CT58-140-1, CT58-140-2, Military T58-GE-1 and T58-GE-5 Engines |
| engine | General Electric Company | CT58-140-2 | GENERAL ELECTRIC Model CT58-100-1, CT58-100-2, CT58-110-1, CT58-110-2, CT58-140-1, CT58-140-2, Military T58-GE-1 and T58-GE-5 Engines |
Unsafe Condition
First stage compressor rotor discs may exceed their life limit margin due to cyclic fatigue, leading to potential disc failure.
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Required Actions
Remove from service specified rotor discs (G.E. P/Ns listed) with more than 9,700 cycles by October 15, 1970, prior to 200 additional cycles. Discs with 9,700 cycles or less must be removed before reaching 9,900 cycles. A cycle is defined as engine operation from start to shutdown including at least one takeoff power acceleration.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Prior to the accumulation of 200 additional cycles for discs over 9,700 cycles by October 15, 1970; before 9,900 cycles for those at or below 9,700 cycles.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
General Electric Model CT58-100-1, CT58-100-2, CT58-110-1, CT58-110-2, CT58-140-1, CT58-140-2, Military T58-GE-1, and T58-GE-5 engines with specified rotor discs (P/Ns listed in the AD).
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Rotor Discs
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_67-01-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 67-01-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: GENERAL ELECTRIC Model CT58-100-1, CT58-100-2, CT58-110-1, CT58-110-2, CT58-140-1, CT58-140-2, Mili...Show more Subject: Rotor Discs Status: Current Citation: This information is not available. Citation Publish Date: 08/12/1976 Effective Date: 08/24/1976 Make: General Electric Company Model: CT58-100-1 | T58-GE-5 | T58-GE-1 | CT58-100-2 | CT58-110-1 | CT58-110-2 | CT58-140-1 | CT58-140-2 Product Type: Engine Product Subtype: Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: AIR-700: Compliance & Airworthiness Division Office of Primary Responsibility: AIR-720: Operational Safety Branch CFR Part Reference: Part 39 Comments: Applicability Note: This AD references Model CT58-100-1 not included on an appropriate TCDS or the ...Show more AIRWORTHINESS DIRECTIVES FINAL RULES: 67-01-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2688 AD NUMBER: 67-01-02 SUBJECT HEADING: GENERAL ELECTRIC Model CT58-100-1, CT58-100-2, CT58-110-1, CT58-110-2, CT58-140-1, CT58-140-2, Military T58-GE-1 and T58-GE-5 Engines ACTION: SUMMARY: DATES: Effective August 24, 1976. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 67-01-02 GENERAL ELECTRIC: Amendment 39-332 as amended by Amendment 39-536 and Amendment 39-1085 is further amended by Amendment 39-2688. Applies to Model CT58-100-1, CT58-100-2, CT58-110-1, CT58-110-2, CT58-140-1, CT58-140-2, T58-GE-1 and T58-GE-5 Engines. Compliance required as indicated. To ensure adequate life limit margin for first stage compressor rotor discs, remove from service G.E. P/N's 37D400218P101, 37D400218P101 CEB #148, 37D400218P102, 37D400359P101, 37D400359P102, 3920T11P01, 3920T11P02, 5013T06P01, 5001T20P01, and 5001T20P02 as follows: (a) Discs with more than 9,700 cycles on October 15, 1970, prior to the accumulation of 200 additional cycles. (b) Discs with 9,700 cycles or less on October 15, 1970, before 9,900 cycles. For the purposes of this AD a cycle is considered as any engine operating sequence involving engine start, at least one acceleration to a power required for take off, and shutdown. Amendment 39-332 became effective December 29, 1966. Amendment 39-536 became effective January 9, 1968. Amendment 39-1085 became effective October 15, 1970. This amendment 39-2688 becomes effective August 24, 1976. FOOTER:
Document Text
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AD Final Rules - DRS_67-01-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 67-01-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: GENERAL ELECTRIC Model CT58-100-1, CT58-100-2, CT58-110-1, CT58-110-2, CT58-140-1, CT58-140-2, Mili...Show more Subject: Rotor Discs Status: Current Citation: This information is not available. Citation Publish Date: 08/12/1976 Effective Date: 08/24/1976 Make: General Electric Company Model: CT58-100-1 | T58-GE-5 | T58-GE-1 | CT58-100-2 | CT58-110-1 | CT58-110-2 | CT58-140-1 | CT58-140-2 Product Type: Engine Product Subtype: Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: AIR-700: Compliance & Airworthiness Division Office of Primary Responsibility: AIR-720: Operational Safety Branch CFR Part Reference: Part 39 Comments: Applicability Note: This AD references Model CT58-100-1 not included on an appropriate TCDS or the ...Show more AIRWORTHINESS DIRECTIVES FINAL RULES: 67-01-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2688 AD NUMBER: 67-01-02 SUBJECT HEADING: GENERAL ELECTRIC Model CT58-100-1, CT58-100-2, CT58-110-1, CT58-110-2, CT58-140-1, CT58-140-2, Military T58-GE-1 and T58-GE-5 Engines ACTION: SUMMARY: DATES: Effective August 24, 1976. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 67-01-02 GENERAL ELECTRIC: Amendment 39-332 as amended by Amendment 39-536 and Amendment 39-1085 is further amended by Amendment 39-2688. Applies to Model CT58-100-1, CT58-100-2, CT58-110-1, CT58-110-2, CT58-140-1, CT58-140-2, T58-GE-1 and T58-GE-5 Engines. Compliance required as indicated. To ensure adequate life limit margin for first stage compressor rotor discs, remove from service G.E. P/N's 37D400218P101, 37D400218P101 CEB #148, 37D400218P102, 37D400359P101, 37D400359P102, 3920T11P01, 3920T11P02, 5013T06P01, 5001T20P01, and 5001T20P02 as follows: (a) Discs with more than 9,700 cycles on October 15, 1970, prior to the accumulation of 200 additional cycles. (b) Discs with 9,700 cycles or less on October 15, 1970, before 9,900 cycles. For the purposes of this AD a cycle is considered as any engine operating sequence involving engine start, at least one acceleration to a power required for take off, and shutdown. Amendment 39-332 became effective December 29, 1966. Amendment 39-536 became effective January 9, 1968. Amendment 39-1085 became effective October 15, 1970. This amendment 39-2688 becomes effective August 24, 1976. FOOTER:
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Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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