Superseded. This AD was superseded by AD 2018-14-10. Verify which one applies to your serial and effectivity before any maintenance action.
AD 2017-12-03
Effective 07/20/2017 · Published 06/15/2017
Airworthiness Directives; Pratt & Whitney Division Turbofan Engines
Summary
We are adopting a new airworthiness directive (AD) for certain Pratt & Whitney Division (PW) PW2037, PW2037M, and PW2040 turbofan engines. This AD was prompted by an unrecoverable engine in-flight shutdown (IFSD) after an ice crystal icing event. This AD requires installing a software standard eligible for installation and precludes the use of electronic engine control (EEC) software standards earlier than SCN 5B/I.…