What was found
DURING HEAVY CHECK, LT FWD SEAT TRACK FRAME 12/20 AT FRAME 17 HAS CORROSSION. MAINTENANCE R & R LT SEAT TRACK FRAME 12/20 AT FRAME 17 IAW SRM 51-40-01, 51-41-03, 51-43-03, 51-43-02,51-23-06. PN 170-03264-001, SEAT TRACK ACFT REMAINS UNTIL HEAVY CHECK IS COMPLETED.