Airworthiness Directive · Amendment 39-12833 · Turbomeca Makila 1 A, 1 A1, and 1 A2 Turboshaft Engines
Turbomeca Makila 1 A, 1 A1, and 1 A2 Turboshaft Engines
Superseded. A later AD replaced this one: AD 2008-08-16. Comply with the one in force.
This airworthiness directive (AD) is applicable to Turbomeca Makila 1 A, 1 A1, and 1 A2 turboshaft engines with digital electronic control units (DECU's) and electronic control units (ECU's) that have a part number (P/N) listed in the following Table 1: Table 1.--ECU and DECU P/N's ECU or DECU P/N Used on 0 177 69 810 0, 0 177 69 811 0, 0 177 69 Makila 1 A and 1 A1 812 0, 0 177 69 813 0, 0 177 69 814 0, 0 engines. 177 69 815 0, 0 177 69 816 0, 0 177 69 817 0, 0 177 69 818 0, 0 177 69 819 0, 0 177 69 820 0, 0 177 69 824 0, 0 177 69 825 0, 0 177 69 826 0, 0 177 69 827 0, 0 177 69 828 0, and 0 177 69 829 0. 70CMB01040................................. Makila 1 A2 engines. These engines are installed on, but not limited to Eurocopter France model AS 332C, AS 332L, AS 332L1 and AS 332L2, helicopters.
This amendment adopts a new airworthiness directive (AD) that is applicable to Turbomeca Makila 1 A, 1 A1, and 1 A2 turboshaft engines. This action requires replacing certain digital electronic control units (DECU's) and electronic control units (ECU's) with modified DECU's and ECU's. This amendment is prompted by a report of an uncontained engine turbine wheel failure and the subsequent loss of control of the helicopter. The actions specified in this AD are intended to prevent an engine overspeed condition resulting from the failure of two or more NTL channels.
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
