FAA-PMA
ST590 is an FAA-PMA part held by S-Tec Corporation (PMA PQ0445SW) — approved as a replacement for Modification Part on Twin Commander Aircraft LLC 690, 690A, and 690B · Current, Nov 2010.
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.
ST590 is cataloged as TESTER,PT INJECTOR. It carries 1 NSN identity and cross-references to 1 related part number. An FAA PMA relationship is on file. The part appears on MCRL cross-reference data.
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