As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING APPROACH, EXTENDED FLAPS TO FIVE UNITS AND ALL WAS NORMAL, BUT FLAPS WOULD NOT EXTEND FURTHER. ALTERNATE FLAPS WERE OK. THE TRAILING EDGE FLAP POSITION INDICATOR WAS DETERMINED TO BE THE CAUSE OF THE DISCREPANCY. REPLACED INDICATOR. OPS CHECK GOOD.