What was found
BEFORE ENGINE START, WITH APU RUNNING, CREW NOTED SMOKE AND BURNING ODOR FROM CABIN LOWER SIDE WALL. MX FOUND THE FWD ECU FAILED. ECU WAS REPLACED.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
BEFORE ENGINE START, WITH APU RUNNING, CREW NOTED SMOKE AND BURNING ODOR FROM CABIN LOWER SIDE WALL. MX FOUND THE FWD ECU FAILED. ECU WAS REPLACED.