As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON APPROACH INTO SLC, LE FLAPS FAILED TO EXTEND. WE RAN THE QRH AND USED THE ALTERNATE FLAP SWITCH AND EXTENDED FC TO FLAPS 15. LANDING AT FL15 WAS UNEVENTFUL. REMOVED AND REPLACED LH FLAP POSITION TRANSMITTER AND FLAP POSITION INDICATOR PER B737 AMM 27-58. OPS CHECKS GOOD.