What was found
RECEIVED AVIONICS SMOKE WARNING ABOUT 20 MIN AFTER T/O. DECLARED EMERGENCY, RAN EMERGENCY NON-NORMAL CHECKLIST. LANDED, DEFERRED AVIONICS RACK SMOKE DETECTOR IAW MEL 26-13-3, MX PROCEDURES C/W ENTERED INTO MM02, MX NOTIFIED NR1376. R & R SMOKE DETECTOR IAW AMM 26-13-05-04. OPS CHECK GOOD, REMOVED FROM MM02, MX NOTIFIED NR12463.