AD 75-22-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Honeywell International Inc. | T5307A | AVCO LYCOMING Model T53 Series Engines |
| engine | Honeywell International Inc. | T5309A | AVCO LYCOMING Model T53 Series Engines |
| engine | Honeywell International Inc. | T5309B | AVCO LYCOMING Model T53 Series Engines |
| engine | Honeywell International Inc. | T5309C | AVCO LYCOMING Model T53 Series Engines |
| engine | Honeywell International Inc. | T5311A | AVCO LYCOMING Model T53 Series Engines |
| engine | Honeywell International Inc. | T5311B | AVCO LYCOMING Model T53 Series Engines |
| engine | Honeywell International Inc. | T5313A | AVCO LYCOMING Model T53 Series Engines |
| engine | Honeywell International Inc. | T5313B | AVCO LYCOMING Model T53 Series Engines |
| engine | Honeywell International Inc. | T5317A | AVCO LYCOMING Model T53 Series Engines |
Unsafe Condition
Secondary failure of the N2 accessory drive shaft due to binding of the torquemeter boost pump drive shaft.
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Required Actions
Remove torquemeter boost pump with Part Number 1-300-221-01 or 1-300-221-02 and replace with Part Number 1-300-221-03 or 1-300-221-04.
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Compliance Time
within 200 hours time in service after the effective date of this AD
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Affected Aircraft
Avco Lycoming T53 series engines
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Federal Register Abstract
Secondary Failure N2 Accessory Drive Shaft
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_75-22-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 75-22-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: AVCO LYCOMING Model T53 Series Engines Subject: Secondary Failure N2 Accessory Drive Shaft Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 10/29/1975 Make: Honeywell International Inc. Model: T5307A | T5309A | T5309B | T5309C | T5311A | T5311B | T5313A | T5313B | T5317A Product Type: Engine Product Subtype: Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 75-22-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2385 AD NUMBER: 75-22-02 SUBJECT HEADING: AVCO LYCOMING Model T53 Series Engines ACTION: SUMMARY: DATES: Effective October 29, 1975. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 75-22-02 AVCO LYCOMING: Amendment 39-2385. Applies to all Avco Lycoming T53 series engines. To prevent secondary failure of the N2 accessory drive shaft, as a result of binding of the torquemeter boost pump drive shaft, remove torquemeter boost pump, Part Number 1-300-221-01 or Part Number 1-300-221- 02, and replace with Part Number 1-300-221-03 or Part Number 1-300-221-04 within 200 hours time in service after the effective date of this AD. NOTE: Avco Lycoming Service Bulletin Number 0031 pertains to this subject. This amendment becomes effective October 29, 1975. FOOTER:
Document Text
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AD Final Rules - DRS_75-22-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 75-22-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: AVCO LYCOMING Model T53 Series Engines Subject: Secondary Failure N2 Accessory Drive Shaft Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 10/29/1975 Make: Honeywell International Inc. Model: T5307A | T5309A | T5309B | T5309C | T5311A | T5311B | T5313A | T5313B | T5317A 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: 75-22-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2385 AD NUMBER: 75-22-02 SUBJECT HEADING: AVCO LYCOMING Model T53 Series Engines ACTION: SUMMARY: DATES: Effective October 29, 1975. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 75-22-02 AVCO LYCOMING: Amendment 39-2385. Applies to all Avco Lycoming T53 series engines. To prevent secondary failure of the N2 accessory drive shaft, as a result of binding of the torquemeter boost pump drive shaft, remove torquemeter boost pump, Part Number 1-300-221-01 or Part Number 1-300-221- 02, and replace with Part Number 1-300-221-03 or Part Number 1-300-221-04 within 200 hours time in service after the effective date of this AD. NOTE: Avco Lycoming Service Bulletin Number 0031 pertains to this subject. This amendment becomes effective October 29, 1975. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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Related Airworthiness Directives
2002-09-09 Recurring
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