Airworthiness Directive · Amendment 39-12883 · Textron Lycoming IO-540, LTIO-540 and TIO-540 Series Reciprocating Engines
Textron Lycoming IO-540, LTIO-540 and TIO-540 Series Reciprocating Engines
This AD is applicable to all Textron Lycoming LTIO-540 and TIO- 540 engines, rated at 300 horsepower (HP) or greater and all IO-540 engines, rated at any HP, that have been modified by supplemental type certificate (STC) listed in Table 1 of this AD, by installing a turbocharger system. These engines are used on, but not limited to Piper Navajo (PA 31, PA 31-350, and PA 31-325), Piper Saratoga (PA 32-301T, PA 32R-301T), Piper Aerostar (PA 60-700P), Piper Malibu Mirage (PA 46-350P), Piper Mojave (PA 31P-350) Appalachian Aircraft Corporation Gavilan (EL-1), and Cessna T-206 airplanes.Table 1 follows: Table 1.--List of STC Numbers SA000214DE SA00356DE SA01925AT SA09650SC SA469NE SA2062WE SA2118NM SE2122WE SA2123NM SA257CE SA2657WE SA2082WE SA305SO SA3513WE SA3719SW SA385WE SA4942NM SA529WE SA530WE SA539WE SA5699NM SA811WE SA840WE SA909WE SA978WE SE00357DE SE01949AT SE1657NM SE978NM SE17WE SE21WE SE22WE SE4157NM SE5869SW SE40WE SE60WE SE6WE SE7734SW SE81WE SA01925AT SA1648NM SA4156NM SA1747CE SE4941NM SA2656WE SA000214DE ................ ................
This amendment supersedes emergency airworthiness directive (AD) 2002-17-53 that was sent previously to all known U.S. owners and operators of Textron Lycoming LTIO-540 and TIO-540 series engines, rated at 300 horsepower (HP) or higher. That action requires, before further flight, replacing certain serial-numbered crankshafts that were hammer forged with crankshafts that were press forged. That AD was prompted by reports of crankshaft failures in LTIO-540 and TIO-540 engines, rated at 300 HP or higher. This amendment expands the suspect population of engines to include engines with crankshafts that were manufactured between March 1997 and the present and all IO-540 engines with crankshafts that were manufactured between March 1997 and the present that have been modified by supplemental type certificate (STC) by installing a turbocharger system. The actions specified by this AD are intended to prevent failure of the crankshaft, which could result in total engine power loss, in-flight engine failure and possible forced landing.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
