Airworthiness directives › 2012-12-20
AD 2012-12-20 Airworthiness Directives; Turbomeca S.A. Turboshaft Engines
Applicability*9
This AD applies to Turbomeca S.A. Arriel 2C1, 2C2, and 2S2 turboshaft engines with any of the digital engine control units (DECUs) listed in Table 1 of this AD installed. Table 1—Serial Numbers of Affected DECUs 529 558 560 655 696 869 878 939 983 1039 1050 1052 1150 1195 1208 1236 1302 1304 1329 1330 1350 1384 1408 1412 1416 1429 1430 1440 1464 1468 1472 1499 1508 1528 1557 1558 1560 1567 1578 1615 1616 1656 1689 N/A
Compliance
From the effective date of this AD, do not install a DECU listed in Table 1 of this AD onto any engine, and do not install any engine having a DECU listed in Table 1 of this AD, onto a helicopter.
Required actions
The Manager, Engine Certification Office, may approve AMOCs for this AD. Use the procedures found in 14 CFR 39.19 to make your request.
Unsafe condition
Unless already done, do the following actions. (1) For any helicopter fitted with two DECUs listed in Table 1 of this AD: (i) Within 50 engine hours after the effective date of this AD, replace one of the two DECUs with a DECU that is not listed in Table 1 of this AD. (ii) Within 1,000 engine hours or 12 months after the effective date of this AD, whichever occurs first, replace the other DECU with a DECU that is not listed in Table 1 of this AD. (2) For any helicopter fitted with one DECU listed in Table 1 of this AD, within 1,000 engine hours or 12 months after the effective date of this AD, whichever occurs first, replace the DECU with a DECU that is not listed in Table 1 of this AD.
Affected ADs
None.
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