AD 63-14-03
final rule
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Lycoming Engines | IO-540-A1A5 | LYCOMING Model O-540 Series Engines and IO-540 Series Engines |
| engine | Lycoming Engines | IO-540-B1A5 | LYCOMING Model O-540 Series Engines and IO-540 Series Engines |
| engine | Lycoming Engines | IO-540-B1B5 | LYCOMING Model O-540 Series Engines and IO-540 Series Engines |
| engine | Lycoming Engines | IO-540-B1C5 | LYCOMING Model O-540 Series Engines and IO-540 Series Engines |
| engine | Lycoming Engines | IO-540-C1B5 | LYCOMING Model O-540 Series Engines and IO-540 Series Engines |
| engine | Lycoming Engines | IO-540-E1A5 | LYCOMING Model O-540 Series Engines and IO-540 Series Engines |
| engine | Lycoming Engines | IO-540-G1A5 | LYCOMING Model O-540 Series Engines and IO-540 Series Engines |
| engine | Lycoming Engines | O-540-A1A | LYCOMING Model O-540 Series Engines and IO-540 Series Engines |
| engine | Lycoming Engines | O-540-A1A5 | LYCOMING Model O-540 Series Engines and IO-540 Series Engines |
| engine | Lycoming Engines | O-540-A1B5 | LYCOMING Model O-540 Series Engines and IO-540 Series Engines |
| engine | Lycoming Engines | O-540-A1C5 | LYCOMING Model O-540 Series Engines and IO-540 Series Engines |
| engine | Lycoming Engines | O-540-A1D | LYCOMING Model O-540 Series Engines and IO-540 Series Engines |
| engine | Lycoming Engines | O-540-A1D5 | LYCOMING Model O-540 Series Engines and IO-540 Series Engines |
| engine | Lycoming Engines | O-540-A2B | LYCOMING Model O-540 Series Engines and IO-540 Series Engines |
| engine | Lycoming Engines | O-540-A3D5 | LYCOMING Model O-540 Series Engines and IO-540 Series Engines |
| engine | Lycoming Engines | O-540-B1A5 | LYCOMING Model O-540 Series Engines and IO-540 Series Engines |
| engine | Lycoming Engines | O-540-B1B5 | LYCOMING Model O-540 Series Engines and IO-540 Series Engines |
| engine | Lycoming Engines | O-540-B2A5 | LYCOMING Model O-540 Series Engines and IO-540 Series Engines |
| engine | Lycoming Engines | O-540-B2B5 | LYCOMING Model O-540 Series Engines and IO-540 Series Engines |
| engine | Lycoming Engines | O-540-D1A5 | LYCOMING Model O-540 Series Engines and IO-540 Series Engines |
| engine | Lycoming Engines | O-540-F1A5 | LYCOMING Model O-540 Series Engines and IO-540 Series Engines |
| engine | Lycoming Engines | O-540-F1B5 | LYCOMING Model O-540 Series Engines and IO-540 Series Engines |
| engine | Lycoming Engines | O-540-J1A5D | LYCOMING Model O-540 Series Engines and IO-540 Series Engines |
| engine | Lycoming Engines | O-540-J2A5D | LYCOMING Model O-540 Series Engines and IO-540 Series Engines |
Unsafe Condition
Oil pump drive shaft (P/N 67512 or 74641) damage could occur, leading to oil pump failure and subsequent engine failure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the oil pump drive shaft per Lycoming Service Bulletin No. 295. Replace damaged shafts before further flight. Continue inspections until P/N 67512 (redesigned) or P/N 74641 is installed, after which inspections may stop.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 25 hours' time in service after the effective date and every 100 hours' time in service thereafter, with specific adjustments based on engine's time in service as of the effective date.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Lycoming Engines, Model O-540 Series (Serial Numbers 101-40 through 6129-40) and IO-540 Series (Serial Numbers 101-48 through 551-48) that do not incorporate Oil Pump Drive Shaft P/N 67512 (redesigned) or 74641.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Oil Pump Drive Shaft
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_63-14-03.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 63-14-03 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: LYCOMING Model O-540 Series Engines and IO-540 Series Engines Subject: Oil Pump Drive Shaft Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 07/06/1963 Make: Lycoming Engines Model: IO-540-A1A5 | IO-540-B1A5 | IO-540-B1B5 | IO-540-B1C5 | IO-540-C1B5 | IO-540-E1A5 | IO-540-G1A5 | O-...Show more 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: Updated RGL applicability to match AD applicability; CAR C-11-185 AIRWORTHINESS DIRECTIVES FINAL RULES: 63-14-03 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 63-14-03 SUBJECT HEADING: LYCOMING Model O-540 Series Engines and IO-540 Series Engines ACTION: SUMMARY: DATES: Effective July 6, 1963. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 63-14-03 LYCOMING: Amdt. 583 Part 507 Federal Register July 6, 1963. Applies to O-540 Series Engines with Serial Numbers 101-40 Through 6129-40 and IO-540 Series Engines with Serial Numbers 101-48 Through 551-48 Which Do Not Incorporate Oil Pump Drive Shaft P/N's 67512 (Redesigned) or 74641. Compliance required as indicated. (a) For Model O-540 Series engines Serial Numbers 101-40 through 5264-40 and IO-540 Series engines, Serial Numbers 101-48 through 423-48, compliance with (c) required within 25 hours' time in service after the effective date of this AD and every 100 hours' time in service thereafter. (b) For Model O-540 Series engines, Serial Numbers 5265-40 through 6129-40 and IO-540 Series engines, Serial Numbers 424-48 through 551-48, compliance with (c) required as follows: (1) Within 25 hours' time in service after the effective date of this AD and every 100 hours' time in service thereafter for engines with more than 275 hours' time in service on the effective date of this AD. (2) Prior to the accumulation of 300 hours total time in service and every 100 hours' time in service thereafter for engines with 275 hours' or less time in service on the effective date of this AD. (c) Inspect the oil pump drive shaft (P/N 67512) on applicable engines in accordance with instructions contained in Lycoming Service Bulletin No. 295. Any shafts which are found to be damaged shall be replaced before further flight. These inspections shall be continued until Lycoming P/N 67512 (redesigned) or P/N 74641 oil pump drive shaft is installed at which time the inspections may be discontinued. NOTE: All remanufactured engines shipped from Lycoming after April 1, 1963, have the new shaft installed. This directive effective July 6, 1963. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_63-14-03.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 63-14-03 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: LYCOMING Model O-540 Series Engines and IO-540 Series Engines Subject: Oil Pump Drive Shaft Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 07/06/1963 Make: Lycoming Engines Model: IO-540-A1A5 | IO-540-B1A5 | IO-540-B1B5 | IO-540-B1C5 | IO-540-C1B5 | IO-540-E1A5 | IO-540-G1A5 | O-...Show more 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: Updated RGL applicability to match AD applicability; CAR C-11-185 AIRWORTHINESS DIRECTIVES FINAL RULES: 63-14-03 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 63-14-03 SUBJECT HEADING: LYCOMING Model O-540 Series Engines and IO-540 Series Engines ACTION: SUMMARY: DATES: Effective July 6, 1963. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 63-14-03 LYCOMING: Amdt. 583 Part 507 Federal Register July 6, 1963. Applies to O-540 Series Engines with Serial Numbers 101-40 Through 6129-40 and IO-540 Series Engines with Serial Numbers 101-48 Through 551-48 Which Do Not Incorporate Oil Pump Drive Shaft P/N's 67512 (Redesigned) or 74641. Compliance required as indicated. (a) For Model O-540 Series engines Serial Numbers 101-40 through 5264-40 and IO-540 Series engines, Serial Numbers 101-48 through 423-48, compliance with (c) required within 25 hours' time in service after the effective date of this AD and every 100 hours' time in service thereafter. (b) For Model O-540 Series engines, Serial Numbers 5265-40 through 6129-40 and IO-540 Series engines, Serial Numbers 424-48 through 551-48, compliance with (c) required as follows: (1) Within 25 hours' time in service after the effective date of this AD and every 100 hours' time in service thereafter for engines with more than 275 hours' time in service on the effective date of this AD. (2) Prior to the accumulation of 300 hours total time in service and every 100 hours' time in service thereafter for engines with 275 hours' or less time in service on the effective date of this AD. (c) Inspect the oil pump drive shaft (P/N 67512) on applicable engines in accordance with instructions contained in Lycoming Service Bulletin No. 295. Any shafts which are found to be damaged shall be replaced before further flight. These inspections shall be continued until Lycoming P/N 67512 (redesigned) or P/N 74641 oil pump drive shaft is installed at which time the inspections may be discontinued. NOTE: All remanufactured engines shipped from Lycoming after April 1, 1963, have the new shaft installed. This directive effective July 6, 1963. 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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