What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
On April 6, 2011, airman found aircraft battery dead on his aircraft, a Mooney M20K. A local maintenance technician removed battery and placed on charge for about two hours, battery indicated 23.6 volts on charge. The technician then reinstalled battery in aircraft. Airman turned master switch on and all gauges function normally; however during engine start the battery was unable to start engine, so the airman requested the ground power unit (gpu) from the FBO to start the aircraft. After engine start and the gpu was disconnected the airman ran engine for about 30 minutes before take off which no abnormalities were noted at that time. During climb (about 10 minutes into flight) and approximately 4000 feet AGL airman stated the over voltage light illuminated steady with alternator gauge output normal. The airman contacted ATC and requested a return to the departure airport (New Orleans lakefront airport) and was making a left turn when all panel lights started to flicker. During decent airman pulled engine power back to a normal descent setting. Approximately 1000 feet AGL, airman stated the aircraft lost engine power and aircraft was unable to make air field causing the airman to configure the aircraft for emergency water landing about ¼ mile from runway in lake pontchartrain. Airman stated he did not switch fuel tanks during emergency. During investigation the aircraft landing gear selector was found in the down and locked position and all three landing gear was down and locked. The throttle was found in idle position with the propeller control and mixture control in the forward position. This aircraft was under water for three weeks and the insurance company plans to remove and send the data plates to AFS-760 before destroying the aircraft.
As the FAA filed it
ON APRIL 6, 2011, AIRMAN FOUND AIRCRAFT BATTERY DEAD ON HIS AIRCRAFT, A MOONEY M20K. A LOCAL MAINTENANCE TECHNICIAN REMOVED BATTERY AND PLACED ON CHARGE FOR ABOUT TWO HOURS, BATTERY INDICATED 23.6 VOLTS ON CHARGE. THE TECHNICIAN THEN REINSTALLED BATTERY IN AIRCRAFT. AIRMAN TURNED MASTER SWITCH ON AND ALL GAUGES FUNCTION NORMALLY; HOWEVER DURING ENGINE START THE BATTERY WAS UNABLE TO START ENGINE, SO THE AIRMAN REQUESTED THE GROUND POWER UNIT (GPU) FROM THE FBO TO START THE AIRCRAFT. AFTER ENGINE START AND THE GPU WAS DISCONNECTED THE AIRMAN RAN ENGINE FOR ABOUT 30 MINUTES BEFORE TAKE OFF WHICH NO ABNORMALITIES WERE NOTED AT THAT TIME. DURING CLIMB (ABOUT 10 MINUTES INTO FLIGHT) AND APPROXIMATELY 4000 FEET AGL AIRMAN STATED THE OVER VOLTAGE LIGHT ILLUMINATED STEADY WITH ALTERNATOR GAUGE OUTPUT NORMAL. THE AIRMAN CONTACTED ATC AND REQUESTED A RETURN TO THE DEPARTURE AIRPORT (NEW ORLEANS LAKEFRONT AIRPORT) AND WAS MAKING A LEFT TURN WHEN ALL PANEL LIGHTS STARTED TO FLICKER. DURING DECENT AIRMAN PULLED ENGINE POWER BACK TO A NORMAL DESCENT SETTING. APPROXIMATELY 1000 FEET AGL, AIRMAN STATED THE AIRCRAFT LOST ENGINE POWER AND AIRCRAFT WAS UNABLE TO MAKE AIR FIELD CAUSING THE AIRMAN TO CONFIGURE THE AIRCRAFT FOR EMERGENCY WATER LANDING ABOUT ¼ MILE FROM RUNWAY IN LAKE PONTCHARTRAIN. AIRMAN STATED HE DID NOT SWITCH FUEL TANKS DURING EMERGENCY.DURING INVESTIGATION THE AIRCRAFT LANDING GEAR SELECTOR WAS FOUND IN THE DOWN AND LOCKED POSITION AND ALL THREE LANDING GEAR WAS DOWN AND LOCKED. THE THROTTLE WAS FOUND IN IDLE POSITION WITH THE PROPELLER CONTROL AND MIXTURE CONTROL IN THE FORWARD POSITION. THIS AIRCRAFT WAS UNDER WATER FOR THREE WEEKS AND THE INSURANCE COMPANY PLANS TO REMOVE AND SEND THE DATA PLATES TO AFS-760 BEFORE DESTROYING THE AIRCRAFT.
NTSB investigation
The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.
Other reports on N305M · 1
Matched to the same aircraft by N-number and date.