AD 59-13-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Rolls-Royce Corporation | 501-D13 | ALLISON Models 501-D13 and -D13A Engines |
| engine | Rolls-Royce Corporation | 501-D13A | ALLISON Models 501-D13 and -D13A Engines |
Unsafe Condition
Spalling of the propeller shaft roller bearing due to high bearing loads caused by the propeller during certain aircraft flight conditions.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Conduct a continuity check using a probe of the reduction gear magnetic plug at least every 10 flight hours. If metal chips are found as specified in Allison Maintenance Manual section 72-0, paragraph 8B, page 219, remove the gearbox.
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Compliance Time
Compliance required as indicated.
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Affected Aircraft
Allison Models 501-D13 and -D13A Engines not modified in accordance with Allison Commercial Engine Bulletin 72-74 and Lockheed Bulletin SB 262.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Propeller Shaft Roller Bearing
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_59-13-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 59-13-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: ALLISON Models 501-D13 and -D13A Engines Subject: Propeller Shaft Roller Bearing Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Rolls-Royce Corporation Model: 501-D13 | 501-D13A Product Type: Engine Product Subtype: Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 59-13-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 59-13-01 SUBJECT HEADING: ALLISON Models 501-D13 and -D13A Engines ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 59-13-01 ALLISON: Applies to Models 501-D13 and -D13A Engines. Compliance required as indicated. Seven recent cases of spalling of the propeller shaft roller bearing on Allison 501-D13 engines necessitates a continuity check using a probe be made of the reduction gear magnetic plug at least every 10 hours on engine installations not modified in accordance with Allison Commercial Engine Bulletin 72-74 and Lockheed Bulletin SB 262. This check is necessary due to high bearing loads caused by propeller during certain aircraft flight conditions. If metal chips are found as described in Allison Maintenance Manual, section 72-0, paragraph 8B, page 219, remove gearbox. This supersedes AD 59-11-01. FOOTER:
Document Text
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AD Final Rules - DRS_59-13-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 59-13-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: ALLISON Models 501-D13 and -D13A Engines Subject: Propeller Shaft Roller Bearing Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Rolls-Royce Corporation Model: 501-D13 | 501-D13A 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: 59-13-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 59-13-01 SUBJECT HEADING: ALLISON Models 501-D13 and -D13A Engines ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 59-13-01 ALLISON: Applies to Models 501-D13 and -D13A Engines. Compliance required as indicated. Seven recent cases of spalling of the propeller shaft roller bearing on Allison 501-D13 engines necessitates a continuity check using a probe be made of the reduction gear magnetic plug at least every 10 hours on engine installations not modified in accordance with Allison Commercial Engine Bulletin 72-74 and Lockheed Bulletin SB 262. This check is necessary due to high bearing loads caused by propeller during certain aircraft flight conditions. If metal chips are found as described in Allison Maintenance Manual, section 72-0, paragraph 8B, page 219, remove gearbox. This supersedes AD 59-11-01. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.
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