FAA-PMA
256-5 is an FAA-PMA part held by Astronics - Advanced Electronic Systems (PMA PQ1974NM) — approved as a replacement for 256-5 on Boeing 737-8 · Current, Nov 2019.
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.
256-5 is cataloged as FILTER,LOW PASS. It carries 2 NSN identities and cross-references to 3 related part numbers. FAA PMA approval is on file from Advanced Electronic Systems (AES). An estimated 2942 aircraft of the approved type are registered in the US. The part appears on MCRL cross-reference data.
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