What was found
YEG FLIGHT 2516: APU FAILED AFTER START - SLIGHT SMELL OF SMOKE AFTER SHUTDOWN. MAINTENANCE C/W FIM TASK 49-20-00-810-803. FOUND BOTH IGNITORS BAD. REPLACED IAW AMM TASK 49-40-01-000-801 AND 49-40-01-400-801. ALSO FOUND IGNITION LEAD FOR A CHANNEL BAD. REPLACED IAW 49-40-07-000-801 AND 49-40-07-400-801. NO HELP. SUSPECT IGNITOR BOX. NO PARTS ON HAND. ON MEL/RSI 353393. AIRCRAFT RETURNED TO SERVICE.10/11: MAINTENANCE STARTED AND RAN APU SERVERAL TIMES WITHOUT TROUBLE. APU DID NOT STALL. NO SMOKE ODOR PRESENT. PERFORMED FUNCTIONAL TEST OF APU IAW AMM TASK 49-00-00-720-801. NO DEFECTS NOTED. CLEARS MEL/RSI 353393.