Airworthiness Directive · Amendment 39-14820 · Societe de Motorisations Aeronautiques (SMA) SR305-230 and SR305-230-1 Reciprocating Engines
Societe de Motorisations Aeronautiques (SMA) SR305-230 and SR305-230-1 Reciprocating Engines
Superseded. A later AD replaced this one: AD 2007-24-06. Comply with the one in force.
This AD applies to SMA SR305-230 and SR305-230-1 reciprocating engines. These engines are installed on, but not limited to, Cessna 182, Maule M-7, and Piper PA-34 airplanes.
We are adopting a new airworthiness directive (AD) for the products listed above. This AD results from mandatory continuing airworthiness information (MCAI) issued by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as: "Over a period of time, the alteration of one electronic control unit (ECU) electronic component can cause a rapid uncontrolled power increase. Several occurrences have already been reported during engine start or during engine warm-up." The event can also occur in flight which can result in loss of control of the airplane. This AD requires actions that are intended to address the unsafe condition described in the MCAI.
Unless already done, do the following actions before further flight.
(1) Determine the serial number (SN) of the ECU installed on the aircraft. Do not operate the engine if the ECU SN is 131 and below, except SN 70, 71, 83, and 88.
(2) If the ECU SN is 131 and below, except 70, 71, 83, and 88, remove and replace the ECU with an ECU having a SN of 132 and above.
None.
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.
Engines
