What was found
AFTER START WHEN FLAPS 20 SELECTED TE FLAP DISAGREE EICAS MESSAGE FOR SLATS EXT BUT FLAPS UP. FLAPS EVENTUALLY EXTENDED RETURN TO GATE. REPLACED FLAP HUD SHUTOFF MODULE. SYSTEM OPERATION IS NORMAL
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
AFTER START WHEN FLAPS 20 SELECTED TE FLAP DISAGREE EICAS MESSAGE FOR SLATS EXT BUT FLAPS UP. FLAPS EVENTUALLY EXTENDED RETURN TO GATE. REPLACED FLAP HUD SHUTOFF MODULE. SYSTEM OPERATION IS NORMAL