As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WING A-ICE FAIL TWICE DURING TEST IN FLIGHT. MAINTENANCE: FOUND WING 1 A/I LOW PSI ON CMC. PERFORMED WING THERMAL A/I FUNCTION TEST AND FOUND WING 1 A/I VALVE OUTLET PSI OUT OF LIMITS. R&R'D WING 1 A/I VALVE IAW EMB 145 AMM 30-11-01 LEAK CHECK GOOD OPS CHECK FAIL. PERFORMED LEAK CHECK AND FOUND PSI DAMPER B-NUT LOOSE. TIGHTENED B-NUT IAW 30-11-14 OPS AND LK CHECK GOOD.