As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ORD - FLT 4138 - FLAPS WERE STUCK AT 9 DEGREES NO ASSOCIATED EICAS MESSAGES OR ALERTS. CREW ELECTED TO RETURN. REPLACED FLAP SELECTOR LEVER IAW EMB AMM 27-53-03. OPS CHECK GOOD. NO OVERWEIGHT LANDING INSPECTION REQUIRED. VERT SPEED WAS LESS THAN 6 FPS. TRANSFERRED TO AML PAGE 2101443 PER 145 AMM 5-50-15. AIRCRAFT RETURNED TO SERVICE. (M)