FAA-PMA
55126 is an FAA-PMA part held by Hartzell Engine Technologies LLC (PMA PQ1383CE) — approved as a replacement for 637817 on Continental Aerospace Technologies Inc.. TSIO-520-CE1B | TSIO-520-CE1F | TSIO-520-CE2B | TSIO-520-T1A | TSIO-520-T1B | TSIO-520-T1F | TSIO-520-T3B | TSIO-520-T4B | TSIO-520-T5B · Current, Sep 2025.
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.
55126 is cataloged as SWITCH,ROTARY. It carries 3 NSN identities and cross-references to 7 related part numbers. FAA PMA approval is on file from Hartzell Engine Technologies LLC. The part appears on MCRL cross-reference data.
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145191-DH3C, 145191-H3C, 145191D43C, 55016, 55125, 55258, AGF0216
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