As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
#1 ENGINE INTAKE BYPASS DOOR REMAINS CLOSED WHEN SWITCH IS PRESSED TO OPEN. DIVERTED AND ACCOMPLISHED UNEVENTFUL LANDING. REMOVED FROM SERVICE. VERIFIED INTK DEF ACT 1 CB (P6) WAS IN. DEPRESSED #1 ENG. INTAKE BYPASS DOOR SWITCH. CLOSED LIGHT REMAINED ILLUMINATED AND BYPASS DOOR REMAINED CLOSED. J.A. 3493. REMOVED #1 ENGINE INTAKE BYPASS DOOR ACTUATOR IAW DASH 8 Q400 AMM 71-61-06-000-801. INSTALLED SERVICEABLE BYPASS DOOR ACTUATOR, IAW DASH 8 Q400 AMM 71-61-06-400-801, PARA 1-5E. E.A. 3510. OPS CHECKED GOOD. RETURNED TO SERVICE.