Narrative:

On climb out of dtw, controller asked if we could give good rate of climb to 370 from 310. We answered yes, and he then cleared us to FL330. At the FL330 leveloff, we were given good rate to 370 and a turn to the south for the climb, after some hesitation by the controller. After leveling at FL330 and the hesitation along with the clearance that followed to FL370, the aircraft leveled at FL330 and we had to reprogram the FL370 climb. We then began a climb and brought our speed back to increase the rate while looking for traffic pointed out to us. The climb rate paused for a few moments and I noticed our FMC's gave a message that they were resyncing. During that time the rate fell off. We then intervened to increase the rate and out of FL347 we got a TCASII alert (red) advising us not to climb. We could see the target aircraft and turned further south to avoid him, and disconnected the autoplt and followed the TCASII command. I believe the hesitation and subsequent reprogram created a situation that made it very difficult to provide the climb needed. This was complicated by the momentary pause caused by the resync. Supplemental information from acn 364934: received RA on TCASII with aircraft 1 O'clock position (sebound) apparently climbing to FL370, started climb leaving FL350 (assigned cruise). Aircraft passed in front about FL350 and 3 NM. ATC advised of RA and climb, was reclred back to FL350. This is not considered a near miss, only loss of separation.

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Original NASA ASRS Text

Title: RADAR CTLR ISSUES A 'GOOD RATE' CLB TO FL370 FOR B757. FLC FAILED TO ADVISE CTLR THAT THEY NOW HAD TO REPROGRAM THE FMC FOR FL370. IT THEN GOES INTO A 'RESYNC' MODE AND CLB RATE FALLS OFF. XING CRUISE TFC AT FL350 PASSES ABOVE BY 300 FT AND WITHIN 2 PT 5 MI. BOTH ACFT RECEIVED TCASII RA'S.

Narrative: ON CLB OUT OF DTW, CTLR ASKED IF WE COULD GIVE GOOD RATE OF CLIMB TO 370 FROM 310. WE ANSWERED YES, AND HE THEN CLRED US TO FL330. AT THE FL330 LEVELOFF, WE WERE GIVEN GOOD RATE TO 370 AND A TURN TO THE S FOR THE CLB, AFTER SOME HESITATION BY THE CTLR. AFTER LEVELING AT FL330 AND THE HESITATION ALONG WITH THE CLRNC THAT FOLLOWED TO FL370, THE ACFT LEVELED AT FL330 AND WE HAD TO REPROGRAM THE FL370 CLB. WE THEN BEGAN A CLB AND BROUGHT OUR SPD BACK TO INCREASE THE RATE WHILE LOOKING FOR TFC POINTED OUT TO US. THE CLB RATE PAUSED FOR A FEW MOMENTS AND I NOTICED OUR FMC'S GAVE A MESSAGE THAT THEY WERE RESYNCING. DURING THAT TIME THE RATE FELL OFF. WE THEN INTERVENED TO INCREASE THE RATE AND OUT OF FL347 WE GOT A TCASII ALERT (RED) ADVISING US NOT TO CLB. WE COULD SEE THE TARGET ACFT AND TURNED FURTHER S TO AVOID HIM, AND DISCONNECTED THE AUTOPLT AND FOLLOWED THE TCASII COMMAND. I BELIEVE THE HESITATION AND SUBSEQUENT REPROGRAM CREATED A SIT THAT MADE IT VERY DIFFICULT TO PROVIDE THE CLB NEEDED. THIS WAS COMPLICATED BY THE MOMENTARY PAUSE CAUSED BY THE RESYNC. SUPPLEMENTAL INFO FROM ACN 364934: RECEIVED RA ON TCASII WITH ACFT 1 O'CLOCK POS (SEBOUND) APPARENTLY CLBING TO FL370, STARTED CLB LEAVING FL350 (ASSIGNED CRUISE). ACFT PASSED IN FRONT ABOUT FL350 AND 3 NM. ATC ADVISED OF RA AND CLB, WAS RECLRED BACK TO FL350. THIS IS NOT CONSIDERED A NEAR MISS, ONLY LOSS OF SEPARATION.

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.