Pilot of C177 cardinal left parked aircraft on ramp untied. PNF unchocked resulting in it rolling in...

Attributes
ACN	369164
Time
Date	199705
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : saf
State Reference	NM
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	Small Aircraft, High Wing, 1 Eng, Fixed Gear
Flight Phase	ground : parked ground : preflight
Flight Plan	VFR
Aircraft 2
Make Model Name	Small Transport, Low Wing, 2 Recip Eng
Flight Phase	ground : parked
Person 1
Affiliation	Other
Function	oversight : pic
Qualification	pilot : private
Experience	flight time last 90 days : 123 flight time total : 131 flight time type : 17
ASRS Report	369164
Person 2
Affiliation	Other
Function	observation : observer
Qualification	pilot : private
Events
Anomaly	conflict : ground critical other anomaly other
Independent Detector	other other : unspecified
Resolutory Action	none taken : detected after the fact
Consequence	other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	Pilot Deviation

Narrative:

I preflted aircraft and then untied the aircraft -- winds were calm. I then proceeded to the FBO to use the facility restroom and get the passenger. The PNF also returned to the FBO to get his flight portfolio, he had unchocked the aircraft. As I walked out of the FBO to go to the aircraft, the line manager asked me if I had unchocked the plane -- my response was 'yes I guessed it had been.' he then told me it had rolled across the parking area and struck another aircraft. The other aircraft, a C340 twin, was struck from the right rear quarter and suffered a broken tail piece (struck by the left wing of the cardinal) and some minor damage to the right engine nacelle. The damage to the cardinal appears to be superficial, broken pitot tube, bruised spinner, broken fiberglass front cowl and dented lower cowling. Neither aircraft appeared to have sustained any structural damage. Both aircraft were unattended and not under power. The decision to pull the chocks was wrong -- I'm not the one who made it -- although as PIC it comes back to me.

Original NASA ASRS Text

Title: PLT OF C177 CARDINAL LEFT PARKED ACFT ON RAMP UNTIED. PNF UNCHOCKED RESULTING IN IT ROLLING INTO A PARKED C340 CAUSING MINOR DAMAGE TO BOTH ACFT.

Narrative: I PREFLTED ACFT AND THEN UNTIED THE ACFT -- WINDS WERE CALM. I THEN PROCEEDED TO THE FBO TO USE THE FACILITY RESTROOM AND GET THE PAX. THE PNF ALSO RETURNED TO THE FBO TO GET HIS FLT PORTFOLIO, HE HAD UNCHOCKED THE ACFT. AS I WALKED OUT OF THE FBO TO GO TO THE ACFT, THE LINE MGR ASKED ME IF I HAD UNCHOCKED THE PLANE -- MY RESPONSE WAS 'YES I GUESSED IT HAD BEEN.' HE THEN TOLD ME IT HAD ROLLED ACROSS THE PARKING AREA AND STRUCK ANOTHER ACFT. THE OTHER ACFT, A C340 TWIN, WAS STRUCK FROM THE R REAR QUARTER AND SUFFERED A BROKEN TAIL PIECE (STRUCK BY THE L WING OF THE CARDINAL) AND SOME MINOR DAMAGE TO THE R ENG NACELLE. THE DAMAGE TO THE CARDINAL APPEARS TO BE SUPERFICIAL, BROKEN PITOT TUBE, BRUISED SPINNER, BROKEN FIBERGLASS FRONT COWL AND DENTED LOWER COWLING. NEITHER ACFT APPEARED TO HAVE SUSTAINED ANY STRUCTURAL DAMAGE. BOTH ACFT WERE UNATTENDED AND NOT UNDER PWR. THE DECISION TO PULL THE CHOCKS WAS WRONG -- I'M NOT THE ONE WHO MADE IT -- ALTHOUGH AS PIC IT COMES BACK TO ME.

Data retrieved from NASA's ASRS site as of July 2007 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.

Pilot of C177 cardinal left parked aircraft on ramp untied. PNF unchocked resulting in it rolling into a parked C340 causing minor damage to both aircraft.