What was found
PDIS 927 27-50 9056 02MAY23 VIE FACT U TE FLAP DISAGREE EICAS WHEN FLAP HANDLE MOVED FROM 5 TO 15. QRH PROCEDURE FOLLOWED. MESSAGE EXTINGUISHED ON STEP 6. LANDED IAH QRH. ***EMERGENCY DECLARED*** FACT 02MAY23 20:36 VIE U AMM 27-51-00-5 TE FLAP OPERATIONAL TEST PERF ACC TO AMM 27-51-00-5 TWO TIMES OPERATED FROM 0 TO 30 NO ABNORMAL OPERATION .ALTERNATE OPS PERF ALL STIS DURING GND OPS .READOUT OF FLAP - SLAT ELEX UNIT (3EA) PERFORMED NO FAULT STORED GVI OF FLAPS PERF NO FINDING