As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON CLIMBOUT, RETRACTING FLAPS, THE 'LE SLAT ASSYMMETRY' EICAS MSG ILLUMINATED AND FLAP IND WAS BETWEEN UP & 1. IT MOMENTARILY CLEARED AD FLAP NEEDLE WENT TO 'UP'. THE EICAS MSG RETURNED AND NEEDLE... LEADING EDGE SLAT SENSOR SWITCH OPERATIONAL TEST C/O SEVERAL TIMES IAW AMM 27-88-00-715-098 REV. 142. NO FAULTS ON PSEU, NO EICAS MSG. TEST SATIS.