Narrative:

The mission was to be a photo flight for the junkers JU52. The JU52 was parked in a very tight area adjacent to a taxiway lined with tora tora aircraft. We initially requested a tug to move us onto an active taxiway, but none was available. A marshaller was requested and we started engines. I wanted to taxi straight ahead, but a helicopter had just landed and blocked the taxiway. This then necessitated trying to make an approximately turn of about 150 degrees. The ground crew member and marshaller initiated taxi clearance. I started an immediate right turn and then stopped the aircraft to evaluate the situation as recommended by the engineer who was looking out the right side of the aircraft. He thought we were getting close to some taxiway markers. I then continued with the taxi when the copilot recommended going straight ahead for a short while. When he said to start turning, I applied power to the #1 engine and applied full right brake to initiate the turn. The ground crew member indicated clearance on the left side. The aircraft was not responding to turn, but continued at an angle, aggravated by the crosswind on the left. At that point, I realized that I was getting too close to the parked aircraft and closed the throttles and applied full braking. The left wing went over the cowl of the tora AT6. The left aileron struck the cowl causing it to depart the aircraft. The JU52 then came to a stop. The JU52 has marginal braking at best, and in this instance, we should never have attempted the turn. Because of the pressure of completing a photo mission, we thought we could complete the turn if we applied enough diligence. There were enough conflicting inputs from the cockpit crew to cause me to use marginal judgement calls. A breakdown of CRM occurred.

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Original NASA ASRS Text

Title: A JU52 TAXIING OUT FOR A PHOTO MISSION HITS A PARKED AT6 ON THE RAMP.

Narrative: THE MISSION WAS TO BE A PHOTO FLT FOR THE JUNKERS JU52. THE JU52 WAS PARKED IN A VERY TIGHT AREA ADJACENT TO A TXWY LINED WITH TORA TORA ACFT. WE INITIALLY REQUESTED A TUG TO MOVE US ONTO AN ACTIVE TXWY, BUT NONE WAS AVAILABLE. A MARSHALLER WAS REQUESTED AND WE STARTED ENGS. I WANTED TO TAXI STRAIGHT AHEAD, BUT A HELI HAD JUST LANDED AND BLOCKED THE TXWY. THIS THEN NECESSITATED TRYING TO MAKE AN APPROX TURN OF ABOUT 150 DEGS. THE GND CREW MEMBER AND MARSHALLER INITIATED TAXI CLRNC. I STARTED AN IMMEDIATE R TURN AND THEN STOPPED THE ACFT TO EVALUATE THE SIT AS RECOMMENDED BY THE ENGINEER WHO WAS LOOKING OUT THE R SIDE OF THE ACFT. HE THOUGHT WE WERE GETTING CLOSE TO SOME TXWY MARKERS. I THEN CONTINUED WITH THE TAXI WHEN THE COPLT RECOMMENDED GOING STRAIGHT AHEAD FOR A SHORT WHILE. WHEN HE SAID TO START TURNING, I APPLIED PWR TO THE #1 ENG AND APPLIED FULL R BRAKE TO INITIATE THE TURN. THE GND CREW MEMBER INDICATED CLRNC ON THE L SIDE. THE ACFT WAS NOT RESPONDING TO TURN, BUT CONTINUED AT AN ANGLE, AGGRAVATED BY THE XWIND ON THE L. AT THAT POINT, I REALIZED THAT I WAS GETTING TOO CLOSE TO THE PARKED ACFT AND CLOSED THE THROTTLES AND APPLIED FULL BRAKING. THE L WING WENT OVER THE COWL OF THE TORA AT6. THE L AILERON STRUCK THE COWL CAUSING IT TO DEPART THE ACFT. THE JU52 THEN CAME TO A STOP. THE JU52 HAS MARGINAL BRAKING AT BEST, AND IN THIS INSTANCE, WE SHOULD NEVER HAVE ATTEMPTED THE TURN. BECAUSE OF THE PRESSURE OF COMPLETING A PHOTO MISSION, WE THOUGHT WE COULD COMPLETE THE TURN IF WE APPLIED ENOUGH DILIGENCE. THERE WERE ENOUGH CONFLICTING INPUTS FROM THE COCKPIT CREW TO CAUSE ME TO USE MARGINAL JUDGEMENT CALLS. A BREAKDOWN OF CRM OCCURRED.

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.