Narrative:

While flying a VFR ferry flight from cak, we were instructed to climb and maintain 6500 ft. The autoplt and preselect were set accordingly. Cak departure called out traffic at 'southwest, 10 mi, descending to 7000 ft.' after some momentary confusion over the 'southwest' term, the traffic was sighted both visually and by our own cas system (brg skywatch). Closure to about 2 mi horizontal and 500 ft vertical occurred when the MD80 crew called out that they were in a RA climb. Cak verified my altitude 6500 ft and announced a 500 ft separation. As this took place, I had seen our autoplt continue a 1000 FPM climb through 6500 ft, the autoplt was immediately disconnected and the aircraft leveled at 6680 ft. No other actions/comments taken. I believe that I had failed to reset the barometer setting on the preselector unit. This unit resets to 29.92 inches when turned on. Current altimeter setting was 30.41 inches hector pascals. Our altimeters had been properly set at 30.41 inches. Our departure was rushed and the autoplt preselect had not been properly checked. Future operations will ensure that the preselect is checked/crosschecked with the altimeters prior to departure.

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Original NASA ASRS Text

Title: CONFLICT BTWN A VFR DEPARTING PA46 AND AN ARR MD80 10 MI W OF CAK, OH, DUE TO AN INCORRECT ALTIMETER SETTING BY THE PA46.

Narrative: WHILE FLYING A VFR FERRY FLT FROM CAK, WE WERE INSTRUCTED TO CLB AND MAINTAIN 6500 FT. THE AUTOPLT AND PRESELECT WERE SET ACCORDINGLY. CAK DEP CALLED OUT TFC AT 'SW, 10 MI, DSNDING TO 7000 FT.' AFTER SOME MOMENTARY CONFUSION OVER THE 'SW' TERM, THE TFC WAS SIGHTED BOTH VISUALLY AND BY OUR OWN CAS SYS (BRG SKYWATCH). CLOSURE TO ABOUT 2 MI HORIZ AND 500 FT VERT OCCURRED WHEN THE MD80 CREW CALLED OUT THAT THEY WERE IN A RA CLB. CAK VERIFIED MY ALT 6500 FT AND ANNOUNCED A 500 FT SEPARATION. AS THIS TOOK PLACE, I HAD SEEN OUR AUTOPLT CONTINUE A 1000 FPM CLB THROUGH 6500 FT, THE AUTOPLT WAS IMMEDIATELY DISCONNECTED AND THE ACFT LEVELED AT 6680 FT. NO OTHER ACTIONS/COMMENTS TAKEN. I BELIEVE THAT I HAD FAILED TO RESET THE BAROMETER SETTING ON THE PRESELECTOR UNIT. THIS UNIT RESETS TO 29.92 INCHES WHEN TURNED ON. CURRENT ALTIMETER SETTING WAS 30.41 INCHES HECTOR PASCALS. OUR ALTIMETERS HAD BEEN PROPERLY SET AT 30.41 INCHES. OUR DEP WAS RUSHED AND THE AUTOPLT PRESELECT HAD NOT BEEN PROPERLY CHKED. FUTURE OPS WILL ENSURE THAT THE PRESELECT IS CHKED/XCHKED WITH THE ALTIMETERS PRIOR TO DEP.

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.