Airworthiness Directive 2002-15-05
one-timeAirworthiness Directives; Turbomeca Makila 1 A, 1 A1, and 1 A2 Turboshaft Engines
What this AD requires
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.
Which aircraft AD 2002-15-05 applies to
AD addresses engine overspeed risk from failure of two or more NTL channels. For Makila 1A/1A1 engines: replace ECUs (part numbers listed in Table 1, not reproduced in retrieved text) with ECUs modified to standard TU 215, or replace the comparator/selector circuit board per Turbomeca SB 298 73 0166 (2001-10-05). For Makila 1A2 engines: replace DECU P/N 70CMB01040 with modified DECU P/N 70CMB01050 per Turbomeca SB 298 73 0149 (2000-01-13). Compliance required within 45 days of the AD effective date.
Whether AD 2002-15-05 actually applies to your aircraft (by serial and installed parts) and whether it’s already complied with comes from that aircraft’s records.
How AD compliance is recorded
A valid compliance record (14 CFR 43.9) states:
Tailplate reads a tail number’s logbooks and matches every applicable AD — including this one — to its compliance evidence, with recurring next-due dates computed.
Look up a tail number →Read the full directive (Federal Register)Applicability is derived from the FAA directive corpus and is advisory, not a legal airworthiness determination. Compliance is established only from an aircraft’s actual records.