As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HYDRAULIC FUMES NOTED IN CABIN ON MX WALK AROUND. MAINTENANCE FOUND A BROKEN PRESSURE SWITCH LEAKING NEAR RECIRCULATION FAN. MX REMOVED & REPLACED GREEN HYD PRESS SWITCH PN 15258-1 SN ON 3777TW SN/OFF 3680 ALL CHECKS GOOD. ALL CHECK GOOD.