CONTROL
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U221557 is cataloged as CONTROL. It carries 1 NSN identity and cross-references to 0 related part numbers. An FAA PMA relationship is on file. The part appears on MCRL cross-reference data.
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FAA-PMA
PMA PQ3764CE. Approved as a replacement for U-221557 on Boeing 757-200 Series, 767-200 Series, 767-300 Series, 767-300F, 737-700, 747-400 Series, 747-400D Series, 747-400F Series (Synchrotransmitter) · Current, Oct 2018.
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A PMA part is approved for the specific eligibility listed on its FAA record; whether it may be installed on a particular aircraft, engine or component is the installer's determination. This page states the FAA record and the listings on PartsAndPlanes.
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