What was found
AIRCRAFT WAS GNDED. AIR INTERRUPT, EMER DECLARED, LANDING UNEVENTFUL & ACFT NOT OVERWEIGHT. DURING TAKEOFF, MASTER CAUTION ILLUMINATED WITH, APU DETECTOR INOPERATIVE LIGHT. DURING CLIMB, MASTER CAUTION ILLUMINATED WITH ALL FIRE WARNING DETECTION LIGHTS. FOUND UNIT M237 NOT SEATED IN RACK & MULTIPLE OPEN LOOP FAULTS. R & R ENG & APU FIRE & OVERHEAT MODULE M279 IAW AMM 26-10-01 & COMPARTMENT OVERHEAT MODULE M237 IAW AMM 26-18-00. SEE ALSO AALA 20160329008.