As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INFLIGHT CREW REPORTED WHEN SELECTING FLAPS 1 ON APPROACH THE FLAPS DID NOT EXTEND. EXTENDED FLAPS WITH THE ALTERNATE FLAPS SWITCH TO FLAPS 15 IAW QRH. EMERGENCY DECLARED, FLIGHT DIVERTED, LANDED WITHOUT INCIDENT. ACFT REMOVED FROM SERVICE. REPLACED NR 2 SKEW SENSOR AND FLAP SLAT ELECTRONICS UNIT. SYSTEM GROUND CHECK NORMAL OPERATION.