JACKSONVILLE, FL, USA
N4916U
CESSNA 210E
AFTER DEPARTURE PLT SELECTED LANDING GEAR UP AND DID NOT RECEIVE A GEAR UP INDICATION. ANOTHER AIRCRAFT FLEW UNDER THE AIRCRAFT AND REPORTED THE NOSE GEAR AND LEFT MAIN GEAR WERE UP AND THAT THE RIGHT MAIN GEAR WAS PARTIALLY EXTENDED. WHEN ATTEMPTS TO CORRECT THIS SITUATION WERE UNSUCCESSFUL THE AIRCRAFT WAS LANDED IN THIS CONFIGUARTION. POST CRASH INSPECTION OF THE AIRCRAFT REVEALED A SECONDARY RELIEF VALVE IN THE HYDRAULIC POWER PACK WAS BEING HELD OPEN BY CONTAMINATION ALLOWING HYDRAULIC PRESSURE TO BY PASS THE LANDING GEAR ACTUATORS. THE LOGBOOK RECORDS FOR THE AIRCRAFT REVEALED NO EVIDENCE THE HYDRAULIC POWER PACK HAD EVER BEEN OVERHAULED OR THAT A MODIFICATION TO REMOVE THE SECONDARY RELIEF VALVE HAD BEEN COMPLIED WITH.
Source: NTSB Aviation Accident Database
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