What was found
SLAT FAIL, PLANNING F200 AT 210KTS SLAT FAIL ON T/O, SLAT REMAINED IN POS 1- ON LANDING, FLAP 3 SELECTION ON LANDING SHOWED. FLAP 5 NORMAL CMC INTERROGATED. FAULT CODE FOUND 27811014ACE. FRM FIM 27-81-00-810-807-A00 C/O SERV RT OTBD SLAT SKEW SENSOR (S2-3) REPLACED AND TESTED SERV IAW AMM 27-83-01-000/400-801-A. PN OFF 1702288B, SN OFF 3108, POS RT INB.