FAA-PMA
A 21 is an FAA-PMA part held by Kelly Aerospace Energy Systems LLC (PMA PQ4176CE) — approved as a replacement for Aero-Lite P/N A21 on Textron Lycoming IO-540-C1B5, -G1B5, -G1C5, -G1D5, -GIE5, -K1A4, -K1A5, -K1B5, -K1E5, -K1F5, -K1G5, -K1J5 · Current, Mar 2014.
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.
A 21 is cataloged as BELT,V. It carries 1 NSN identity and cross-references to 4 related part numbers. An FAA PMA relationship is on file. The part appears on MCRL cross-reference data.
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