Airworthiness directives › 2022-07-04
AD 2022-07-04 Airworthiness Directives; Pilatus Aircraft Ltd. Airplanes
Makes named: pilatus. Models named: PC-12/47E. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to Pilatus Aircraft Ltd. Model PC-12/47E airplanes, serial number (S/N) 1720 and S/N 2001 and larger, certificated in any category.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
(1) Group 1 airplanes: Airplanes with an inward vent valve part number (P/N) 963.04.26.520 installed with a serial number listed in section 1.C(1) of Pilatus Service Bulletin No. 28-015, dated October 12, 2020 (Pilatus SB 28-015). (2) Group 2 airplanes: Airplanes without an inward vent valve P/N 963.04.26.520 installed with a serial number listed in section 1.C(1) of Pilatus SB 28-015.
Unsafe condition
This AD was prompted by mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI identifies the unsafe condition as inward vent valves installed during production without chromate conversion coating on the bonding surface. The FAA is issuing this AD to prevent corrosion and degradation of the electrical bonding to Rib 16. This condition, if not addressed, could lead to arcing between the ungrounded equipment and the primary structure in the event of a lightning strike, resulting in a fire and reduced airplane control.
Affected ADs
None.
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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