What was found
OVEN R42 A4, PAPER CONTENTS SHEET LEFT ATTACHED TO INSERT & CAUGHT FIRE WHEN OVEN REACHED TEMPERATURE. EXTINGUISHED WITH HALON. NO OTHER DAMAGE NOTED. CONFIRMED ONLY ATTRIBUTED TO A4 PAPER SHEET LEFT ON INSERT. ACCOMPLISHED CHECKS IAW AMM 05-51-56 & FORM 46.6020 COMPLETED. NO OTHER FAULTS NOTED. OVEN R42 DEACTIVATED DUE HALON USED. 26 MAY 16 OVEN DEACTIVATED, DUE TO HALON DISCHARGED INTO CAVITY.