Superseded. This AD was superseded by AD 2018-17-01. Verify which one applies to your serial and effectivity before any maintenance action.
AD 2017-15-02
Effective 08/04/2017 · Published 07/20/2017
Airworthiness Directives; Bell Helicopter Textron, Inc. (Bell) Helicopters
Summary
We are adopting a new airworthiness directive (AD) for Bell Model 212 and Model 412 helicopters. This AD requires replacing certain oil and fuel check valves and prohibits installing them on any helicopter. This AD is prompted by a report of cracked or leaking check valves. These actions are intended to address an unsafe condition on these helicopters.