Airworthiness directives › 2018-17-01
AD 2018-17-01 Airworthiness Directives; Bell Helicopter Textron, Inc. (Bell) Helicopters
Models named: 212, 412, 412CF, 412EP. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to Bell Model 212, 412, 412CF, and 412EP 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), except a check valve marked “TQL” next to the manufacturing date code, installed.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
(1) Within 25 hours time-in-service: (i) Replace each fuel check valve. (ii) For Model 212, 412CF, and 412EP helicopters, replace each engine oil check valve. (2) After the effective date of this AD, do not install on any helicopter a 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), except for a check valve marked “TQL” next to the manufacturing date code.
Unsafe condition
This AD defines the unsafe condition as a cracked or leaking check valve, which could result in loss of lubrication or fuel to the engine, failure of the engine or a fire, and subsequent loss of control of the helicopter.
Affected ADs
This AD replaces AD 2017-15-02, Amendment 39-18962 (82 FR 33439, July 20, 2017).
Read the original on the Federal Register →
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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1