What was found
WHEN SELECTING FLAPS, FLAP POWER CAUTION LIGHT ILLUMINATED, FOLLOWING EMERGENCY CHECKLIST, UNABLE TO RESTORE POWER TO FLAP SYSTEM. CONDUCTED ZERO FLAP LANDING WITHOUT FURTHER INCIDENT. MX COMPLIED WITH SL DH8-400-SL-27-002A, CAUTION LIGHT EXTINGUISHED. COMPLIED WITH OPS CHECK IAW AMM 27-50-00, PAGES 501-203. OPS CHECK GOOD. NO PARTS REPLACED. ACFT RETURNED TO SERVICE.