Narrative:

Air carrier X at FL240 10 east of djb, proceeding wbound on an inbound course to dtw. Y, a PA46, was eastbound 2 mi east of djb, at FL230. Controller issued FL230 traffic at 12 O'clock and 6 mi to X. X advised controller that he had the traffic on TCASII. Seconds later, as X passed over the top of Y, X made a quick climb to FL260, and then advised the controller of a TCASII resolution. The pilot stated that the TCASII had spotted traffic 600 ft below. Throughout the resolution, Y showed level at FL230. At the time of the resolution, aircraft Z was west of dbj, and cleared to FL250, proceeding eastbound inbound to pit. Aircraft X TCASII resolution placed it in direct conflict with aircraft Z. An adjacent radar controller quickly climbed aircraft Z back up to avoid head-on collision. Aircraft X told to expedite descent back to FL240 to maintain separation with aircraft Z. It appeared the 2 aircraft were within 1000 ft vertically, although I am not sure. I asked X what he had climbed for, and he said it was for traffic 600 ft below. I told him again about the FL230 traffic that was level, and he insisted again he had traffic within 600 ft below. There was no other traffic below him at the time. He did not explain why it took a 2000 ft climb to resolve this apparent problem. Supplemental information from acn 268035: when Z was showing FL260 I noticed X made C indicate a climb to FL245. Immediately I amended X to FL260. He had gone through it but climbed back up. Seconds later X indicated FL260 and head-on with Z. I then climbed Z top FL270 and called the low altitude controller to try and get him to push X back down. X responded to a TCASII alert from a PA46 which was level at FL230. The PA46 traffic was issued to X prior to the RA.

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Original NASA ASRS Text

Title: TCASII INDUCED LTSS. ACR X TCASII RA WITH Y HAD LTSS WITH Z.

Narrative: ACR X AT FL240 10 E OF DJB, PROCEEDING WBOUND ON AN INBOUND COURSE TO DTW. Y, A PA46, WAS EBOUND 2 MI E OF DJB, AT FL230. CTLR ISSUED FL230 TFC AT 12 O'CLOCK AND 6 MI TO X. X ADVISED CTLR THAT HE HAD THE TFC ON TCASII. SECONDS LATER, AS X PASSED OVER THE TOP OF Y, X MADE A QUICK CLB TO FL260, AND THEN ADVISED THE CTLR OF A TCASII RESOLUTION. THE PLT STATED THAT THE TCASII HAD SPOTTED TFC 600 FT BELOW. THROUGHOUT THE RESOLUTION, Y SHOWED LEVEL AT FL230. AT THE TIME OF THE RESOLUTION, ACFT Z WAS W OF DBJ, AND CLRED TO FL250, PROCEEDING EBOUND INBOUND TO PIT. ACFT X TCASII RESOLUTION PLACED IT IN DIRECT CONFLICT WITH ACFT Z. AN ADJACENT RADAR CTLR QUICKLY CLBED ACFT Z BACK UP TO AVOID HEAD-ON COLLISION. ACFT X TOLD TO EXPEDITE DSCNT BACK TO FL240 TO MAINTAIN SEPARATION WITH ACFT Z. IT APPEARED THE 2 ACFT WERE WITHIN 1000 FT VERTLY, ALTHOUGH I AM NOT SURE. I ASKED X WHAT HE HAD CLBED FOR, AND HE SAID IT WAS FOR TFC 600 FT BELOW. I TOLD HIM AGAIN ABOUT THE FL230 TFC THAT WAS LEVEL, AND HE INSISTED AGAIN HE HAD TFC WITHIN 600 FT BELOW. THERE WAS NO OTHER TFC BELOW HIM AT THE TIME. HE DID NOT EXPLAIN WHY IT TOOK A 2000 FT CLB TO RESOLVE THIS APPARENT PROB. SUPPLEMENTAL INFO FROM ACN 268035: WHEN Z WAS SHOWING FL260 I NOTICED X MADE C INDICATE A CLB TO FL245. IMMEDIATELY I AMENDED X TO FL260. HE HAD GONE THROUGH IT BUT CLBED BACK UP. SECONDS LATER X INDICATED FL260 AND HEAD-ON WITH Z. I THEN CLBED Z TOP FL270 AND CALLED THE LOW ALT CTLR TO TRY AND GET HIM TO PUSH X BACK DOWN. X RESPONDED TO A TCASII ALERT FROM A PA46 WHICH WAS LEVEL AT FL230. THE PA46 TFC WAS ISSUED TO X PRIOR TO THE RA.

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.