SCHELLVILLE, CA, USA
N27GP
MITSUBISHI MU-2B
AT APPROXIMATELY 800 FT DOWN THE LEFT SIDE OF THE RWY THE LEFT ENG EXPERIENCED A POWER LOSS. THE ACFT SWERVED OFF THE LEFT SIDE OF THE RWY COLLIDING WITH A DRAINAGE DITCH & COMING TO REST INVERTED. EXAMINATION OF THE FUEL CONTROL UNIT REVEALED THAT THE BELLOWS WITHIN THE ASSEMBLY WERE FOUND IN AN EXTENDED POSITION, INDICATING A LEAK INTO THE EVACUATED AREA. A FAILURE WAS NOTED AT THE SEAM IN THE BELLOWS. IN ADDITION, EXAMINATION OF THE PROPELLER REVEALED THAT THE START LOCKS WERE ENGAGED & THE BLADES WERE AT THE START LOCK POSITION AT IMPACT. IN ORDER TO ENGAGE THE START LOCKS, THE POWERLEVER HAS TO BE MOVED TO REVERSE DURING SHUTDOWN WITH THE ENG RPM BELOW 50%. AFTER ENG START THE PLT MUST AGAIN RETARD THE POWER LEVERS TO REVERSE TO DISENGAGE THE START LOCKS. THE LOCKS WILL NOT DISENGAGE AFTER THE POWER LEVER IS SET TO THE FLIGHT RANGE.
Source: NTSB Aviation Accident Database
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