Watch part 3-420: an email the morning the government solicits or buys it, or an AD names it. Free.
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FAA-PMA

3-420 is an FAA-PMA part held by Timken Corporation (PMA PQ4105CE) — approved as a replacement for 3420 on Mcdonnell Douglas DC3C-S1C3G, DC3C-S4C4G, DC3D-R-1830-90C · Current, May 2016.

2 PMA replacement parts on file for 3-420

A PMA part is approved for the specific eligibility listed on its FAA record; whether it may go on a particular aircraft, engine or component is the installer's determination from that record and the eligibility list. A part-number match alone does not establish eligibility. Source: FAA DRS PMA database, refreshed weekly. Data, not advice.

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