What was found
5780 - ORD - CHATTERING NOISE COMING FROM A/C ON LEFT SIDE. MAINTENANCE REPLACED GROUND SPOILER VALVE.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
5780 - ORD - CHATTERING NOISE COMING FROM A/C ON LEFT SIDE. MAINTENANCE REPLACED GROUND SPOILER VALVE.