What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
The aircraft departed geg. During gear and flap retraction, the aircraft lost hydraulic pressure and quantity on the left hydraulic system. The crew returned to geg and performed the alternate gear extension. The landing was uneventful. Maintenance found a large quantity of hydraulic fluid leaking from the under belly of the aircraft forward of the wing-body fairing. Subsequent inspection found the leak to be caused by a broken o-ring in the leading edge bypass valve. The o-ring was replaced and the left hydraulic system was serviced and operationally checked. The operational check was good and no leaks were noted. The aircraft was released to service.
As the FAA filed it
THE AIRCRAFT DEPARTED GEG. DURING GEAR AND FLAP RETRACTION, THE AIRCRAFT LOST HYDRAULIC PRESSURE AND QUANTITY ON THE LEFT HYDRAULIC SYSTEM. THE CREW RETURNED TO GEG AND PERFORMED THE ALTERNATE GEAR EXTENSION. THE LANDING WAS UNEVENTFUL.MAINTENANCE FOUND A LARGE QUANTITY OF HYDRAULIC FLUID LEAKING FROM THE UNDER BELLY OF THE AIRCRAFT FORWARD OF THE WING-BODY FAIRING. SUBSEQUENT INSPECTION FOUND THE LEAK TO BE CAUSED BY A BROKEN O-RING IN THE LEADING EDGE BYPASS VALVE.THE O-RING WAS REPLACED AND THE LEFT HYDRAULIC SYSTEM WAS SERVICED AND OPERATIONALLY CHECKED. THE OPERATIONAL CHECK WAS GOOD AND NO LEAKS WERE NOTED. THE AIRCRAFT WAS RELEASED TO SERVICE.
Other reports on N520UA · 1
Matched to the same aircraft by N-number and date.