What was found
WHILE A/C WAS IN FOR HEAVY CHECK FOUND POSSIBLE CORROSION IN A FEW AREAS ON THE RT SEAT TRACKBEAM FROM THE R1 DOOR AND FWD. MX REMOVED AND REPLACED SEAT TRACK IAW EMB 170/175 SRM 51-40-02, 51-40-04, 51-41-02, 51-43-01, AND 51-23-06. PN 170-03263-001 (BEAM). A/C REMAINS IN CMH FOR HEAVY CHECK COMPLETION.