As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAKEOFF DURING FLAP RETRACTION, SPLIT FLAPS OCCURRED. O/B FLAPS FROZE AT 15 I/B, FLAPS CONTINUED RETRACTING. ALT FLAP EXTENSION PROCEDURE PERFORMED BUT L/E DEVICES WOULD NOT RETRACT. ALT FLAPS USED TO EXTEND FLAPS FOR NORMAL LAND PDX. *S/D* REPLACED LEFT OUTBOARD FLAP TRANSMITTER, FLAPS OPERATED NORMALLY.