While closing access panel after jump starting left engine; aircraft starts to move. The reporter bumps the throttle climbing into the cockpit and the aircraft rolls down an embankment before brakes can be applied; causing damage.

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Attributes
ACN	765054
Time
Date	200712
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	PA-23-250 Aztec
Operating Under FAR Part	Part 91
Flight Phase	ground : parked
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : instrument pilot : multi engine pilot : private
Experience	flight time last 90 days : 30 flight time total : 1896 flight time type : 829
ASRS Report	765054
Events
Anomaly	aircraft equipment problem : less severe excursion : ramp other anomaly
Independent Detector	other flight crewa
Resolutory Action	none taken : insufficient time none taken : unable
Consequence	other
Supplementary
Problem Areas	Aircraft Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

When I tried starting the engines for my flight to ZZZ the battery was too weak to start the engines; I removed the front right side panel exposing the battery. I found a line person with jumper cables and started the left engine. I did not start the right engine because with that engine running I could not replace the side panel. The line person disconnected the jumper cables and left. I set the parking brake and got out of the airplane replaced the side panel and closed the front baggage door. While walking back to get in the airplane it started moving. I ran to get back in the pilot seat; while doing so I bumped the throttle. I got my feet on the brakes and just about had it stopped but the nose was over the embankment and the mains were on the wet grass and it just slid down the embankment; damaging the nose gear and 1 propeller on the right engine.

Original NASA ASRS Text

Title: WHILE CLOSING ACCESS PANEL AFTER JUMP STARTING LEFT ENGINE; ACFT STARTS TO MOVE. THE REPORTER BUMPS THE THROTTLE CLIMBING INTO THE COCKPIT AND THE ACFT ROLLS DOWN AN EMBANKMENT BEFORE BRAKES CAN BE APPLIED; CAUSING DAMAGE.

Narrative: WHEN I TRIED STARTING THE ENGS FOR MY FLT TO ZZZ THE BATTERY WAS TOO WEAK TO START THE ENGS; I REMOVED THE FRONT R SIDE PANEL EXPOSING THE BATTERY. I FOUND A LINE PERSON WITH JUMPER CABLES AND STARTED THE L ENG. I DID NOT START THE R ENG BECAUSE WITH THAT ENG RUNNING I COULD NOT REPLACE THE SIDE PANEL. THE LINE PERSON DISCONNECTED THE JUMPER CABLES AND LEFT. I SET THE PARKING BRAKE AND GOT OUT OF THE AIRPLANE REPLACED THE SIDE PANEL AND CLOSED THE FRONT BAGGAGE DOOR. WHILE WALKING BACK TO GET IN THE AIRPLANE IT STARTED MOVING. I RAN TO GET BACK IN THE PLT SEAT; WHILE DOING SO I BUMPED THE THROTTLE. I GOT MY FEET ON THE BRAKES AND JUST ABOUT HAD IT STOPPED BUT THE NOSE WAS OVER THE EMBANKMENT AND THE MAINS WERE ON THE WET GRASS AND IT JUST SLID DOWN THE EMBANKMENT; DAMAGING THE NOSE GEAR AND 1 PROP ON THE R ENG.

Data retrieved from NASA's ASRS site as of January 2009 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.