2006-20-09: Certain crankshafts replacing
FAA order 2006-20-09 is an airworthiness directive in force since November 3, 2006. The FAA's subject line: Certain crankshafts replacing. It names the Lycoming AEIO-360-A1B6, Lycoming AEIO-360-A1E6, Lycoming AEIO-540-D4A5, Lycoming AEIO-540-L1B5, Lycoming AEIO-540 series, Lycoming IO-360-A1B6, Lycoming IO-360-A1B6D, Lycoming IO-360-A3B6, Lycoming IO-360-A3B6D, Lycoming IO-360-B1G6, Lycoming IO-360-C1C6, Lycoming IO-360-C1D6, Lycoming IO-360-C1E6, Lycoming IO-360-C1G6, Lycoming IO-540-AA1A5, Lycoming IO-540-AB1A5, Lycoming IO-540-AC1A5, Lycoming IO-540-AE1A5, Lycoming IO-540-C4B5, Lycoming IO-540-C4D5D, Lycoming IO-540-D4A5, Lycoming IO-540-D4B5, Lycoming IO-540-E1A5, Lycoming IO-540-E1B5, Lycoming IO-540-J4A5, Lycoming IO-540-K1A5, Lycoming IO-540-K1A5D, Lycoming IO-540-K1B5, Lycoming IO-540-K1E5, Lycoming IO-540-K1F5, Lycoming IO-540-K1G5, Lycoming IO-540-K1G5D, Lycoming IO-540-K1H5, Lycoming IO-540-K1J5, Lycoming IO-540-L1C5, Lycoming IO-540-M1C5, Lycoming IO-540-S1A5, Lycoming IO-540 series, Lycoming IO-540-T4A5D, Lycoming IO-540-T4B5, Lycoming IO-540-W1A5, Lycoming IO-720, Lycoming LO-360-A1G6D, Lycoming LO-360-A1H6, Lycoming O-360-A1F6, Lycoming O-360-A1F6D, Lycoming O-360-A1G6D, Lycoming O-360-A1H6, Lycoming O-360-E1A6D, Lycoming O-360-F1A6, Lycoming O-540-A1A5, Lycoming O-540-A1B5, Lycoming O-540-A1C5, Lycoming O-540-A1D5, Lycoming O-540-A4D5, Lycoming O-540-B1A5, Lycoming O-540-B2B5, Lycoming O-540-B2C5, Lycoming O-540-B4B5, Lycoming O-540-E4A5, Lycoming O-540-E4B5, Lycoming O-540-E4C5, Lycoming O-540-F1B5, Lycoming O-540-G1A5, Lycoming O-540-J1A5D, Lycoming O-540-J3A5D, Lycoming O-540-J3C5D, Lycoming O-540-L3C5D, Lycoming TIO-540-AA1AD, Lycoming TIO-540-AE2A, Lycoming TIO-540-AF1B, Lycoming TIO-540-AG1A, Lycoming TIO-540-AH1A, Lycoming TIO-540-AK1A, Lycoming TIO-540-C1A, Lycoming TIO-540-J2B, Lycoming TIO-540 series, Lycoming TIO-540-U2A engines: about 15,780 aircraft on the U.S. register today across them, though an order usually covers particular versions or serial numbers rather than every one. System: engine.
What it applies to as the FAA lists it
- Kind of product
- Engine
- Makes
- Lycoming Engines; Textron Lycoming, AVCO Corporation
- Models
- AEIO-360-A1B6, AEIO-360-A1E6, AEIO-540-D4A5, AEIO-540-L1B5, AEIO-540-L1D5, IO-360-A1B6, IO-360-A1B6D, IO-360-A3B6, IO-360-A3B6D, IO-360-B1G6, IO-360-C1C6, IO-360-C1D6, IO-360-C1E6, IO-360-C1G6, IO-540-AA1A5, IO-540-AB1A5, IO-540-AC1A5, IO-540-AE1A5, IO-540-C4B5, IO-540-C4D5, IO-540-C4D5D, IO-540-D4A5, IO-540-D4B5, IO-540-E1A5, IO-540-E1B5, IO-540-J4A5, IO-540-K1A5, IO-540-K1A5D, IO-540-K1B5, IO-540-K1E5, IO-540-K1F5, IO-540-K1G5, IO-540-K1G5D, IO-540-K1H5, IO-540-K1J5, IO-540-K1J5D, IO-540-K1K5, IO-540-L1C5, IO-540-M1A5, IO-540-M1C5, IO-540-S1A5, IO-540-T4A5D, IO-540-T4B5, IO-540-T4B5D,...
- Engine series
- Lycoming AEIO-360-A1B6 11 aircraft
Lycoming AEIO-360-A1E6 2 aircraft
Lycoming AEIO-540-D4A5 55 aircraft
Lycoming AEIO-540-L1B5 56 aircraft
Lycoming AEIO-540 series 434 aircraft
Lycoming IO-360-A1B6 141 aircraft
Lycoming IO-360-A1B6D 844 aircraft
Lycoming IO-360-A3B6 5 aircraft
Lycoming IO-360-A3B6D 74 aircraft
Lycoming IO-360-B1G6 173 aircraft
Lycoming IO-360-C1C6 64 aircraft
Lycoming IO-360-C1D6 14 aircraft
Lycoming IO-360-C1E6 43 aircraft
Lycoming IO-360-C1G6 3 aircraft
Lycoming IO-540-AA1A5 8 aircraft
Lycoming IO-540-AB1A5 768 aircraft
Lycoming IO-540-AC1A5 50 aircraft
Lycoming IO-540-AE1A5 1,037 aircraft
Lycoming IO-540-C4B5 179 aircraft
Lycoming IO-540-C4D5D 31 aircraft
Lycoming IO-540-D4A5 236 aircraft
Lycoming IO-540-D4B5 13 aircraft
Lycoming IO-540-E1A5 4 aircraft
Lycoming IO-540-E1B5 4 aircraft
Lycoming IO-540-J4A5 9 aircraft
Lycoming IO-540-K1A5 44 aircraft
Lycoming IO-540-K1A5D 3 aircraft
Lycoming IO-540-K1B5 17 aircraft
Lycoming IO-540-K1E5 5 aircraft
Lycoming IO-540-K1F5 2 aircraft
Lycoming IO-540-K1G5 48 aircraft
Lycoming IO-540-K1G5D 52 aircraft
Lycoming IO-540-K1H5 2 aircraft
Lycoming IO-540-K1J5 10 aircraft
Lycoming IO-540-L1C5 18 aircraft
Lycoming IO-540-M1C5 2 aircraft
Lycoming IO-540-S1A5 10 aircraft
Lycoming IO-540 series 4,218 aircraft
Lycoming IO-540-T4A5D 4 aircraft
Lycoming IO-540-T4B5 17 aircraft
Lycoming IO-540-W1A5 31 aircraft
Lycoming IO-720 119 aircraft
Lycoming LO-360-A1G6D 3 aircraft
Lycoming LO-360-A1H6 9 aircraft
Lycoming O-360-A1F6 13 aircraft
Lycoming O-360-A1F6D 18 aircraft
Lycoming O-360-A1G6D 11 aircraft
Lycoming O-360-A1H6 106 aircraft
Lycoming O-360-E1A6D 7 aircraft
Lycoming O-360-F1A6 23 aircraft
Lycoming O-540-A1A5 7 aircraft
Lycoming O-540-A1B5 4 aircraft
Lycoming O-540-A1C5 4 aircraft
Lycoming O-540-A1D5 18 aircraft
Lycoming O-540-A4D5 7 aircraft
Lycoming O-540-B1A5 1 aircraft
Lycoming O-540-B2B5 27 aircraft
Lycoming O-540-B2C5 13 aircraft
Lycoming O-540-B4B5 40 aircraft
Lycoming O-540-E4A5 9 aircraft
Lycoming O-540-E4B5 21 aircraft
Lycoming O-540-E4C5 15 aircraft
Lycoming O-540-F1B5 299 aircraft
Lycoming O-540-G1A5 6 aircraft
Lycoming O-540-J1A5D 11 aircraft
Lycoming O-540-J3A5D 6 aircraft
Lycoming O-540-J3C5D 24 aircraft
Lycoming O-540-L3C5D 18 aircraft
Lycoming TIO-540-AA1AD 2 aircraft
Lycoming TIO-540-AE2A 488 aircraft
Lycoming TIO-540-AF1B 14 aircraft
Lycoming TIO-540-AG1A 1 aircraft
Lycoming TIO-540-AH1A 90 aircraft
Lycoming TIO-540-AK1A 508 aircraft
Lycoming TIO-540-C1A 9 aircraft
Lycoming TIO-540-J2B 6 aircraft
Lycoming TIO-540 series 5,079 aircraft
Lycoming TIO-540-U2A 3 aircraft
Dates and paperwork
- In force since
- November 3, 2006
- Published
- September 29, 2006 (signed September 20, 2006)
- Docket
- FAA-2006-24785
- Replaced by
- 2012-19-01
- Status
- Historical
- The FAA's document
- Read the order on the FAA's site
The FAA's summary their words, unchanged
The FAA is adopting a new airworthiness directive (AD) for certain Lycoming Engines (L)O-360, (L)IO-360, AEIO-360, O-540, IO-540, AEIO-540, (L)TIO-540, IO-580, and IO-720 series reciprocating engines. This AD requires replacing certain crankshafts. This AD results from reports of 23 confirmed failures of similar crankshafts in Lycoming Engines 360 and 540 series reciprocating engines. We are issuing this AD to prevent failure of the crankshaft, which will result in total engine power loss, in-flight engine failure, and possible loss of the aircraft.
The order itself the regulatory text, as published
Show the full text (10,283 characters)
Source: FAA Dynamic Regulatory System, airworthiness directives. The FAA's document is the authority; the register counts are this site's, from the FAA register of October 5, 2026. Connections as data: /graph/directive/2006-20-09.json · aircraft systems.
