What was found
REPORTED AFTER TAKEOFF WITH FLAP HANDLE IN UP POSITION FLAPS INDICATOR REMAINED AT 1. RETURNED & LANDED WITHOUT FURTHER EVENT. MX CHECKED CONTINUITY & WIRING INTEGRITY OF FLAP POSITION TRANSMITTERS TO D4542 & 4546, FOUND TO BE GOOD. MX UNABLE TO DUPLICATE FAULT. R & R LT & RT FLAP POSITION TRANSMITTERS FOR PRECAUTIONARY IAW AMWEST TASKCARD R3M27029. OPS CHECKS GOOD. CONFIRMED FAILURE OF BOTH TRANSMITTERS. UPON TEARDOWN, FOUND BOTH UNITS NEEDED TO BE CALIBRATED, & PACKINGS DEFECTIVE. ON SERIAL NR AAE3024 2 CONNECTOR WIRES FOUND UNSOLDERED . OVERHAULED & TESTED BOTH UNITS IAW HONEYWELL CMM ATA 27-50-18 REV. 4.