KNOXVILLE, TN, USA
N30S
CESSNA T337G
THE ACFT MADE AN EMERGENCY GEAR UP LANDING WHEN BOTH THE NORMAL AND EMERGENCY EXTENSION SYSTEMS FAILED TO FUNCTION PROPERLY. A MECHANIC WAS LATER ABLE TO EXTEND THE GEAR WITH THE ACFT ON JACKS BY REPEATEDLY CYCLING THE SELECTOR SWITCH.IT WAS DETERMINED THAT THE SOLENOID ON THE LANDING GEAR HYDRAULIC MANIFOLD ASSEMBLY HAD MALFUNCTIONED, LEAVING THE SELECTOR VALVE ASSEMBLY STUCK IN THE UP POSITION. CESSNA SERVICE LETTER SE76-24 RECOMMENDS REPLACEMENT OF THE SOLENOID WITH AN IMPROVED VERSION. ACCORDING TO THE MECHANIC, THIS HAD NOT BEEN ACCOMPLISHED PRIOR TO THE ACCIDENT.
Source: NTSB Aviation Accident Database
Aviation Accidents App
In-Depth Access to Aviation Accident Reports
