NTSB Identification: CHI84LA090.
The docket is stored on NTSB microfiche number 24942.
Accident occurred Thursday, January 19, 1984 in ROCKFORD, IL
Aircraft: CESSNA 210D, registration: N502RF
Injuries: 2 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.

THE PLT WAS ON A MAINTENANCE TEST FLT TO CHECK THE LANDING GEAR HYDRAULIC POWER PAC. HE WAS UNABLE TO LOWER THE MAIN LANDING GEAR AND LANDED WITH THE NOSEWHEEL DOWN. EXAMINATION OF THE HYDRAULIC PAC AFTER THE ACCIDENT REVEALED THAT THE HYDRAULIC SYSTEM HAD NOT BEEN PROPERLY BLED & ENTRAPPED AIR, WHICH RESULTED IN AN EXTREMELY HIGH FLOW OF AIR THRU THE SECONDARY RELIEF VALVE, PREVENTING PROPER SYSTEM OPERATION.

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

HYDRAULIC SYSTEM..OTHER

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

MAINTENANCE,INSTALLATION..IMPROPER..OTHER MAINTENANCE PERSONNEL


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