AD 82-20-51
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Honeywell International Inc. | LTP 101-600 | AVCO LYCOMING Model LTP101-600 and LTP101-600A, LTP101-600A-1A, LTP101-700A-1A Engines |
| engine | Honeywell International Inc. | LTP 101-600A | AVCO LYCOMING Model LTP101-600 and LTP101-600A, LTP101-600A-1A, LTP101-700A-1A Engines |
| engine | Honeywell International Inc. | LTP 101-600A-1A | AVCO LYCOMING Model LTP101-600 and LTP101-600A, LTP101-600A-1A, LTP101-700A-1A Engines |
| engine | Honeywell International Inc. | LTP 101-700A-1A | AVCO LYCOMING Model LTP101-600 and LTP101-600A, LTP101-600A-1A, LTP101-700A-1A Engines |
Unsafe Condition
Failure of the N2 accessory idler gear assembly could result in loss of engine power and subsequent forced landing.
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Required Actions
Remove the N2 accessory idler gear assembly and replace it with Avco Lycoming Kit P/N TLW-18823 in accordance with Service Bulletins LTP101A-72-0021 Rev. 1 and LTP101-72-0025 Rev. 1.
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Compliance Time
Within the next 25 hours time in service after receipt of this telegraphic AD unless already accomplished
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Affected Aircraft
Avco Lycoming Model LTP101-600 and LTP101-600A (all serial numbers), Model LTP101-600A-1A (prior to S/N 50095), and Model LTP101-700A-1A (prior to S/N 51009)
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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