NTSB Identification: MIA86LA104.
The docket is stored on NTSB microfiche number 30501.
Accident occurred Tuesday, March 25, 1986 in JACKSONVILLE, FL
Aircraft: CESSNA 210E, registration: N4916U
Injuries: 1 Uninjured.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

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.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

LANDING GEAR,NORMAL RETRACTION/EXTENSION ASSEMBLY..CONTAMINATION

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

WHEELS UP LANDING..PERFORMED..PILOT IN COMMAND

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

MAINTENANCE,SERVICE OF AIRCRAFT/EQUIPMENT..IMPROPER..OTHER MAINTENANCE PERSONNEL

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