AD 81-19-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | General Electric Company | CF6-6D | GENERAL ELECTRIC Model CF6-6 Series Engines |
| engine | General Electric Company | CF6-6D1 | GENERAL ELECTRIC Model CF6-6 Series Engines |
| engine | General Electric Company | CF6-6D1A | GENERAL ELECTRIC Model CF6-6 Series Engines |
| engine | General Electric Company | CF6-6K | GENERAL ELECTRIC Model CF6-6 Series Engines |
| engine | General Electric Company | CF6-6K2 | GENERAL ELECTRIC Model CF6-6 Series Engines |
Unsafe Condition
Low cycle fatigue failure of low pressure turbine rotor stage 2 disks with part numbers 9690M77P03, 9690M77P04, 9690M77P09, 9690M77P11, and 9690M77P13.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Reduce life limits below approved figures. Remove from service low pressure turbine rotor stage 2 disks prior to reaching revised life limits or within 25 cycles after AD effective date, whichever is later.
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Compliance Time
within 25 cycles in service after the effective date of this AD
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Affected Aircraft
General Electric Model CF6-6 series engines installed in McDonnell Douglas DC10-10 aircraft with low pressure turbine rotor stage 2 disks part numbers 9690M77P03, 9690M77P04, 9690M77P09, 9690M77P11, and 9690M77P13.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Low Pressure Turbine Rotor Stage 2 Disks
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_81-19-08.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 81-19-08 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: GENERAL ELECTRIC Model CF6-6 Series Engines Subject: Low Pressure Turbine Rotor Stage 2 Disks Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 09/21/1981 Make: General Electric Company Model: CF6-6D | CF6-6D1 | CF6-6D1A | CF6-6K | CF6-6K2 Product Type: Engine Product Subtype: Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 81-19-08 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-4219 AD NUMBER: 81-19-08 SUBJECT HEADING: GENERAL ELECTRIC Model CF6-6 Series Engines ACTION: SUMMARY: DATES: Effective September 21, 1981. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 81-19-08 GENERAL ELECTRIC: Amendment 39-4219. Applies to all General Electric Model CF6-6 series turbofan engines installed in McDonnell Douglas DC10-10 aircraft containing low pressure turbine rotor stage 2 disks, P/Ns 9690M77P03, 9690M77P04, 9690M77P09, 9690M77P11, and 9690M77P13. Compliance required as indicated. To prevent possible low cycle fatigue failure of these disks, the life limits have been reduced below the figures currently approved. Remove from service low pressure turbine rotor stage 2 disks prior to reaching the revised life limits listed below or within the next 25 cycles in service after the effective date of this AD, whichever comes later. Disk Part Number Previous Life Limit/Cycles Revised Life Limit/Cycles 9690M77P03 27,000 11,500 9690M77P04 27,000 11,500 9690M77P09 27,000 11,500 9690M77P11 27,000 11,500 Serial Numbers MP0A0727 through MP0A2215 9690M77P11 27,000 9,300 All other serial numbered disks 9690M77P13 27,000 10,000 NOTE: General Electric CF6-6 Service Bulletin 72-786 pertains to this subject. This amendment becomes effective on September 21, 1981. FOOTER:
Document Text
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AD Final Rules - DRS_81-19-08.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 81-19-08 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: GENERAL ELECTRIC Model CF6-6 Series Engines Subject: Low Pressure Turbine Rotor Stage 2 Disks Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 09/21/1981 Make: General Electric Company Model: CF6-6D | CF6-6D1 | CF6-6D1A | CF6-6K | CF6-6K2 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: 81-19-08 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-4219 AD NUMBER: 81-19-08 SUBJECT HEADING: GENERAL ELECTRIC Model CF6-6 Series Engines ACTION: SUMMARY: DATES: Effective September 21, 1981. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 81-19-08 GENERAL ELECTRIC: Amendment 39-4219. Applies to all General Electric Model CF6-6 series turbofan engines installed in McDonnell Douglas DC10-10 aircraft containing low pressure turbine rotor stage 2 disks, P/Ns 9690M77P03, 9690M77P04, 9690M77P09, 9690M77P11, and 9690M77P13. Compliance required as indicated. To prevent possible low cycle fatigue failure of these disks, the life limits have been reduced below the figures currently approved. Remove from service low pressure turbine rotor stage 2 disks prior to reaching the revised life limits listed below or within the next 25 cycles in service after the effective date of this AD, whichever comes later. Disk Part Number Previous Life Limit/Cycles Revised Life Limit/Cycles 9690M77P03 27,000 11,500 9690M77P04 27,000 11,500 9690M77P09 27,000 11,500 9690M77P11 27,000 11,500 Serial Numbers MP0A0727 through MP0A2215 9690M77P11 27,000 9,300 All other serial numbered disks 9690M77P13 27,000 10,000 NOTE: General Electric CF6-6 Service Bulletin 72-786 pertains to this subject. This amendment becomes effective on September 21, 1981. FOOTER:
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Retrieved: Apr 8, 2026
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