As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
'FLAP POWER' CAUTION ILLUMINATED ON FINAL APPROACH BELOW FLAP 15 DEGREES. PERFORMED GO-AROUND. LANDED FLAPS 15. UNEVENTFUL. REMOVED FROM SERVICE. CDS FAULT, HYDRAULIC POWER LOSS. CYCLED FLAP POWER C/B. C/W OPS CHECK OF WING FLAPS IAW Q400 MM 27-50-00-710-801. OPS CHECK GOOD. CAUTION LIGHT DID NOT RETURN. COULD NOT DUPLICATE. RETURNED TO SERVICE. NO PARTS REPLACED.