Narrative:

After releasing jumpers from 13500' I began to descend normally. Through 120 KTS I heard a loud noise and the aircraft rolled right. At first I thought the tail jack may have broke and eased back on the stick, but the elevator had effectiveness. I slowed to va, knowing something was terribly wrong. I then looked out to my right and noticed that there was a problem with the right aileron. A turn to the right would turn the aileron up and expose the bottom below the wing, causing a rolling action. I then made al turns to the left and landed. After landing and after our a&I inspected the aircraft, corrosion was discovered and a cracked supporting device. I am not a mechanic. The operator of the aircraft and the mechanic said they would contact the NTSB. I then became ill and was not able to return to work for 8 days. Upon returning I learned that neither the a&I nor the owner/operator had reported the problem. I have since terminated my employment with them. Callback conversation with reporter revealed the following: reporter stated that when the lower skin was peeled back from the wing, corrosion was found. Did not know if owner or mechanic reported this to the FAA or NTSB, but assumes they did not. Claims this aircraft has very thin skin and that the tail jacks have broken on several aircraft, causing accidents.

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Original NASA ASRS Text

Title: POTENTIAL LOSS OF CTL AS AILERON SUPPORT BRACKET COMES LOOSE FROM INTERNAL STRINGER, CAUSING ACFT TO ATTEMPT A ROLL.

Narrative: AFTER RELEASING JUMPERS FROM 13500' I BEGAN TO DSND NORMALLY. THROUGH 120 KTS I HEARD A LOUD NOISE AND THE ACFT ROLLED RIGHT. AT FIRST I THOUGHT THE TAIL JACK MAY HAVE BROKE AND EASED BACK ON THE STICK, BUT THE ELEVATOR HAD EFFECTIVENESS. I SLOWED TO VA, KNOWING SOMETHING WAS TERRIBLY WRONG. I THEN LOOKED OUT TO MY RIGHT AND NOTICED THAT THERE WAS A PROB WITH THE RIGHT AILERON. A TURN TO THE RIGHT WOULD TURN THE AILERON UP AND EXPOSE THE BOTTOM BELOW THE WING, CAUSING A ROLLING ACTION. I THEN MADE AL TURNS TO THE LEFT AND LANDED. AFTER LNDG AND AFTER OUR A&I INSPECTED THE ACFT, CORROSION WAS DISCOVERED AND A CRACKED SUPPORTING DEVICE. I AM NOT A MECH. THE OPERATOR OF THE ACFT AND THE MECH SAID THEY WOULD CONTACT THE NTSB. I THEN BECAME ILL AND WAS NOT ABLE TO RETURN TO WORK FOR 8 DAYS. UPON RETURNING I LEARNED THAT NEITHER THE A&I NOR THE OWNER/OPERATOR HAD RPTED THE PROB. I HAVE SINCE TERMINATED MY EMPLOYMENT WITH THEM. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING: RPTR STATED THAT WHEN THE LOWER SKIN WAS PEELED BACK FROM THE WING, CORROSION WAS FOUND. DID NOT KNOW IF OWNER OR MECH RPTED THIS TO THE FAA OR NTSB, BUT ASSUMES THEY DID NOT. CLAIMS THIS ACFT HAS VERY THIN SKIN AND THAT THE TAIL JACKS HAVE BROKEN ON SEVERAL ACFT, CAUSING ACCIDENTS.

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.