Narrative:

I arrived at the pilot's quarters early as usual in preparation to relieve the day pilot. Upon contacting dispatch I was informed that the aircraft and crew were en route to the hospital, returning from a flight from ZZZ. Pilot had asked the dispatcher to inform me of their ETA and ask me if I would be willing to fly the aircraft to xyz executive airport for refueling to which I readily said yes. Upon their arrival at the helipad the controls were locked down and pilot briefed me on the aircraft status and the days events. At this time I boarded the aircraft, completed a cockpit check and returned the throttles to full fly position. After receiving a clearance from executive tower, I departed the helipad and proceeded direct to the airport. My approach was to runway 13 to north altitude of 100 ft, then airtaxi along taxiway hotel to an altitude of 500 ft then to taxiway foxtrot and along foxtrot at 50 ft until above the refueling spot and straight down to the ground. This is my normal approach and had previously been safe and uneventful. After landing and shutdown, I noticed a man approaching the helicopter. He then informed me that I had just damaged 2 of his airplanes with my rotor wash. Upon inspection of his airplanes I did see some areas that were in fact damaged. An eyewitness said he saw one of the airplanes turn about 45 degree and strike the other airplane. This man has complained to airport operations previously about helicopters landing in this same spot. His ramp is immediately next to taxiway foxtrot which is the only way onto the FBO ramp. For this reason I have always used an extremely high hover past his hangar. Approximately 50 ft. Of the 2 airplanes on his ramp only 1 was tied down. The untied airplane was pointing in the opposite direction of the airplane that was tied down, the untied airplane turned about 45 degree to the right, it's vertical stabilizer striking the left wing tip of the other airplane. Also the elevator of the untied airplane struck the ground, bending the left rear corner. Damage to 1 was on the left wing tip in front of the navigation light about the size of a baseball. Damage to 2 was to the left side of the vertical stabilizer about 5 inches long vertically and 1/2 inch wide. Also to the left rear corner of the elevator about 4 inches long laterally and about 1/2 inch wide.

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Original NASA ASRS Text

Title: HELI AIR TAXIED AT ELEVATION OF 50 FT AGL UNTIL OVER FUELING AREA AND HOVERED DOWN. POSTFLT, OWNER OF PARKED ACFT COMPLAINED OF DAMAGE TO HIS PARKED ACFT FROM THE HELI ROTOR WASH.

Narrative: I ARRIVED AT THE PLT'S QUARTERS EARLY AS USUAL IN PREPARATION TO RELIEVE THE DAY PLT. UPON CONTACTING DISPATCH I WAS INFORMED THAT THE ACFT AND CREW WERE ENRTE TO THE HOSPITAL, RETURNING FROM A FLT FROM ZZZ. PLT HAD ASKED THE DISPATCHER TO INFORM ME OF THEIR ETA AND ASK ME IF I WOULD BE WILLING TO FLY THE ACFT TO XYZ EXECUTIVE ARPT FOR REFUELING TO WHICH I READILY SAID YES. UPON THEIR ARR AT THE HELIPAD THE CTLS WERE LOCKED DOWN AND PLT BRIEFED ME ON THE ACFT STATUS AND THE DAYS EVENTS. AT THIS TIME I BOARDED THE ACFT, COMPLETED A COCKPIT CHK AND RETURNED THE THROTTLES TO FULL FLY POS. AFTER RECEIVING A CLRNC FROM EXECUTIVE TWR, I DEPARTED THE HELIPAD AND PROCEEDED DIRECT TO THE ARPT. MY APCH WAS TO RWY 13 TO N ALT OF 100 FT, THEN AIRTAXI ALONG TAXIWAY HOTEL TO AN ALT OF 500 FT THEN TO TAXIWAY FOXTROT AND ALONG FOXTROT AT 50 FT UNTIL ABOVE THE REFUELING SPOT AND STRAIGHT DOWN TO THE GND. THIS IS MY NORMAL APCH AND HAD PREVIOUSLY BEEN SAFE AND UNEVENTFUL. AFTER LNDG AND SHUTDOWN, I NOTICED A MAN APCHING THE HELI. HE THEN INFORMED ME THAT I HAD JUST DAMAGED 2 OF HIS AIRPLANES WITH MY ROTOR WASH. UPON INSPECTION OF HIS AIRPLANES I DID SEE SOME AREAS THAT WERE IN FACT DAMAGED. AN EYEWITNESS SAID HE SAW ONE OF THE AIRPLANES TURN ABOUT 45 DEG AND STRIKE THE OTHER AIRPLANE. THIS MAN HAS COMPLAINED TO ARPT OPS PREVIOUSLY ABOUT HELIS LNDG IN THIS SAME SPOT. HIS RAMP IS IMMEDIATELY NEXT TO TAXIWAY FOXTROT WHICH IS THE ONLY WAY ONTO THE FBO RAMP. FOR THIS REASON I HAVE ALWAYS USED AN EXTREMELY HIGH HOVER PAST HIS HANGAR. APPROX 50 FT. OF THE 2 AIRPLANES ON HIS RAMP ONLY 1 WAS TIED DOWN. THE UNTIED AIRPLANE WAS POINTING IN THE OPPOSITE DIRECTION OF THE AIRPLANE THAT WAS TIED DOWN, THE UNTIED AIRPLANE TURNED ABOUT 45 DEG TO THE R, IT'S VERT STABILIZER STRIKING THE L WING TIP OF THE OTHER AIRPLANE. ALSO THE ELEVATOR OF THE UNTIED AIRPLANE STRUCK THE GND, BENDING THE L REAR CORNER. DAMAGE TO 1 WAS ON THE L WING TIP IN FRONT OF THE NAV LIGHT ABOUT THE SIZE OF A BASEBALL. DAMAGE TO 2 WAS TO THE L SIDE OF THE VERT STABILIZER ABOUT 5 INCHES LONG VERTICALLY AND 1/2 INCH WIDE. ALSO TO THE L REAR CORNER OF THE ELEVATOR ABOUT 4 INCHES LONG LATERALLY AND ABOUT 1/2 INCH WIDE.

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.