Narrative:

I was captain and PF on a B727 departing ord runway 14L. Our aircraft was light weight and we had a maintenance deferral that required a maximum power takeoff (automatic pack trip was inoperative). Due to the light weight, I selected flaps 5 degrees for takeoff. These factors combined to give us an unusually rapid acceleration and very high rate of climb. Just after gear retraction, ord tower advised us that we would see an aircraft Y going missed approach off runway 4R. Both the first officer and I tried to see the other aircraft (its a flight path was from 100 degrees to our right) but it wasn't visible. We then looked at the TCASII display and I saw a target slightly right and reading about 200 ft below us. I increased the pitch angle to about 20 degrees nose high with the aircraft still at flaps 5 degrees and maximum power. Airspeed was about 170 KIAS and decreasing slowly. As the target passed below us, the TCASII displayed 300 ft then 400 ft below. Shortly after that, I saw a B757 or B767 appear below us and to the left. Obviously, our light weight and unusually high rate of climb helped us avoid an near midair collision. We did not get a TCASII RA/TA. My concern is that having takeoffs and arrs on runways with extended ctrlines that cross is very dangerous if a go around occurs.

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Original NASA ASRS Text

Title: AN ACR FLC FLYING A B727 FROM ORD RPTS AN NMAC WITH ANOTHER ACR THAT WAS IN THE PROCESS OF A GAR.

Narrative: I WAS CAPT AND PF ON A B727 DEPARTING ORD RWY 14L. OUR ACFT WAS LIGHT WT AND WE HAD A MAINT DEFERRAL THAT REQUIRED A MAX PWR TKOF (AUTO PACK TRIP WAS INOP). DUE TO THE LIGHT WT, I SELECTED FLAPS 5 DEGS FOR TKOF. THESE FACTORS COMBINED TO GIVE US AN UNUSUALLY RAPID ACCELERATION AND VERY HIGH RATE OF CLB. JUST AFTER GEAR RETRACTION, ORD TWR ADVISED US THAT WE WOULD SEE AN ACFT Y GOING MISSED APCH OFF RWY 4R. BOTH THE FO AND I TRIED TO SEE THE OTHER ACFT (ITS A FLT PATH WAS FROM 100 DEGS TO OUR R) BUT IT WASN'T VISIBLE. WE THEN LOOKED AT THE TCASII DISPLAY AND I SAW A TARGET SLIGHTLY R AND READING ABOUT 200 FT BELOW US. I INCREASED THE PITCH ANGLE TO ABOUT 20 DEGS NOSE HIGH WITH THE ACFT STILL AT FLAPS 5 DEGS AND MAX PWR. AIRSPD WAS ABOUT 170 KIAS AND DECREASING SLOWLY. AS THE TARGET PASSED BELOW US, THE TCASII DISPLAYED 300 FT THEN 400 FT BELOW. SHORTLY AFTER THAT, I SAW A B757 OR B767 APPEAR BELOW US AND TO THE L. OBVIOUSLY, OUR LIGHT WT AND UNUSUALLY HIGH RATE OF CLB HELPED US AVOID AN NMAC. WE DID NOT GET A TCASII RA/TA. MY CONCERN IS THAT HAVING TKOFS AND ARRS ON RWYS WITH EXTENDED CTRLINES THAT CROSS IS VERY DANGEROUS IF A GAR OCCURS.

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.