Airworthiness Directive · Amendment 39-18962 · -13-p
Bell Helicopter Textron, Inc. (Bell) Helicopters
Superseded. A later AD replaced this one: AD 2018-17-01. Comply with the one in force.
This AD applies to Bell Model 212 and 412 helicopters, certificated in any category, with an engine oil check valve part number (P/N) 209-062-520-001 or fuel check valve P/N 209-062-607-001 manufactured by Circor Aerospace, marked “Circle Seal” and with a manufacturing date code of “10/11” (October 2011) through “03/15” (March 2015), installed.
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.
You are responsible for performing each action required by this AD within the specified compliance time unless it has already been accomplished prior to that time.
(1) Within 25 hours time-in-service:
(i) Replace each fuel check valve.
(ii) For Model 212 helicopters, replace each engine oil check valve.
(2) After the effective date of this AD, do not install any check valve P/N 209-062-520-001 or P/N 209-062-607-001 manufactured by Circor Aerospace, marked “Circle Seal” and with a manufacturing date code of “10/11” (October 2011) through “03/15” (March 2015), on any helicopter.
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.
