As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA FLIGHT NR 2528: NR 1 ENGINE INTAKE BYPASS DOOR SWITCHLIGHT WAS DARK WITH SWITCH ACTIVATED. LAMPS CHECKED GOOD. SWITCH ACTIVATION/DEACTIVATION HAD NO EFFECT. CIRCUIT BREAKER (P6-'INTK DEC ACT 1') WAS TRIPPED. MAINTENANCE REMOVED AND REPLACED INTAKE BYPASS DOOR SWITCH NR 1. OPS CHECK GOOD IAW Q400 AMM TASK 71-61-06-710-801. BREAKER REMAINED SET. AIRCRAFT RETURNED TO SERVICE.