As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON T/O WHEN FLAPS RET FROM 5 TO 1, TE FLAPS ASSYM LIGHT AND EICAS MSG DISPLAY. RTN TO LAND. FOUND CONNECTOR D1802 ON RT FLAP POS XMITTER BAD. REPLACED PLUG AND BIN. MEGGED OUT WIRING FROM XMITTER TO FSEU. ALL CKS OK. NO HELP. REPLACED RT TE FLAP POS X-MITTER AND NULLED PER MM. FLAP SYS CKS GOOD.