Airworthiness directives › 2020-18-19
AD 2020-18-19 Airworthiness Directives; Leonardo S.p.a. Helicopters
Applicability*9
This AD supersedes AD 2014-12-07, Amendment 39-17868 (79 FR 35035, June 19, 2014).
Compliance
(1) Within 75 hours time-in-service (TIS), remove from service: (i) Pinion P/N 412-040-301-101 with serial number C17987; (ii) Pinion P/N 412-040-301-101 with serial number C17990; and (iii) Pinion P/N 412-040-301-101 with serial number C17991. (2) Within 100 hours TIS, if the rotor brake quill has never been overhauled, perform a magnetic particle inspection on each pinion for a crack. If there is a crack, before further flight, remove the pinion from service. (3) As of the effective date of this AD, do not install pinion P/N 412-040-301-101 with serial number C17987, C17990, or C17991 on any helicopter.
Required actions
Special flight permits are prohibited.
Unsafe condition
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.
Affected ADs
This AD defines the unsafe condition as a crack in a pinion. This condition could result in failure of a pinion, detachment of parts inside the transmission causing a malfunction or jamming, and subsequent loss of control of the helicopter.
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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