The Incident
On 29 August 2017 at 0955 UTC, a Beech 200C Super King Air (registration G-NIAB, serial number BL-16) was operating a commercial air transport passenger flight with one pilot and two passengers. Shortly after departing from Belfast International Airport, the pilot and passengers noticed an unusual smell in the cabin, reminiscent of a solvent. As a precaution, the pilot donned his oxygen mask, declared a PAN (possible assistance needed), and prepared to return to the airport.
Landing Difficulties
When configuring the aircraft for landing, the pilot attempted to extend the flaps but found that they would not deploy. He subsequently performed a successful flapless landing, taxied to the apron, and shut down the aircraft. No injuries were reported among the occupants.
Examination and Findings
Post-flight examination revealed that the flap motor circuit breaker had tripped and the flap motor had burnt out. The burnt-out motor was likely the source of the unusual smell. The precise cause of the failure was not established; however, the maintenance organization noted that flap motor failure is not uncommon on this type of aircraft. The damage was limited to the flap control motor.
Pilot Experience
The commander, aged 47, held a Commercial Pilot's Licence and had accumulated 1,866 flying hours, of which 894 were on the Beech 200C. His recent flying experience included 113 hours in the last 90 days and 34 hours in the last 28 days.