AD 79-06-06 R2
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Honeywell International Inc. | LTP 101-600 | AVCO LYCOMING DIVISION Model LTS101-600A, -600B, -600A-2, and -650A-2 and LTP101-600 and -600A Engines |
| engine | Honeywell International Inc. | LTP 101-600A | AVCO LYCOMING DIVISION Model LTS101-600A, -600B, -600A-2, and -650A-2 and LTP101-600 and -600A Engines |
| engine | Honeywell International Inc. | LTS101-600A | AVCO LYCOMING DIVISION Model LTS101-600A, -600B, -600A-2, and -650A-2 and LTP101-600 and -600A Engines |
| engine | Honeywell International Inc. | LTS101-600A-2 | AVCO LYCOMING DIVISION Model LTS101-600A, -600B, -600A-2, and -650A-2 and LTP101-600 and -600A Engines |
| engine | Honeywell International Inc. | LTS101-600B | AVCO LYCOMING DIVISION Model LTS101-600A, -600B, -600A-2, and -650A-2 and LTP101-600 and -600A Engines |
| engine | Honeywell International Inc. | LTS101-650A-2 | AVCO LYCOMING DIVISION Model LTS101-600A, -600B, -600A-2, and -650A-2 and LTP101-600 and -600A Engines |
Unsafe Condition
Lubrication system contamination leading to oil starvation of engine bearings and subsequent engine stoppage.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Perform a spectrometric oil analysis every 25 hours of engine operation as outlined in the Avco Lycoming Engine Maintenance Manual and Alert Notice 3V-W714. If iron content exceeds six parts per million, increases by three parts per million between samples, or any other metal exceeds five parts per million, inspect and repair prior to further flight. Alternative methods may discontinue requirements if approved.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within the next 5 hours of engine operation unless already accomplished and every 25 hours thereafter
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
AVCO LYCOMING DIVISION LTS101-600A, -600B, -600A-2, -650A-2 turboshaft engines and LTP101-600, -600A turboprop engines, including serial numbers LE 50001 through LE 50017 for LTP101 models.
AI-generated summary from the source AD text. Verify against the official source before acting.
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.