Narrative:

Climbing off phl runway 27L at high rate, had just turned to 255 degrees departure heading at about 1500 ft when TCASII sounded 'decrease climb, decrease climb,' then 'descend, descend!' as we were climbing at about 3500 FPM and all this took place very quickly, it was only a few seconds before recognition and action of push-over began. At the high rate of climb, inertia impeded an immediate climb stop, and as we went through 0 rate of climb down, the small aircraft became visible at our 3 O'clock. It was spotted by the first officer, who said the small aircraft was going in the opposite direction. I never saw it. When we informed departure of the event, he didn't seem too upset. Then said another sector was working that aircraft, and the small aircraft had us in sight. The presence of the small aircraft was news to us. Neither tower nor departure mentioned him, and we would have used the normal see and avoid if we suspected an aircraft on our departure path. Evidently, he was on some sort of local 'photo' mission or something. I feel that the ATC folks failed their duties by not mentioning the small aircraft. That, combined with our high rate of climb, high deck angle, and doing the normal after takeoff checklist duties, contributed to a potentially hazardous situation which could have been avoided if we had been informed by phl departure of the other aircraft. I have no problem flying near other aircraft in a TCA, if I only know of them.

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Original NASA ASRS Text

Title: MLG CLBING OUT OF PHL HAS A TCASII RA ON AN SMA ON A PHOTO MISSION IN THE TCA.

Narrative: CLBING OFF PHL RWY 27L AT HIGH RATE, HAD JUST TURNED TO 255 DEGS DEP HDG AT ABOUT 1500 FT WHEN TCASII SOUNDED 'DECREASE CLB, DECREASE CLB,' THEN 'DSND, DSND!' AS WE WERE CLBING AT ABOUT 3500 FPM AND ALL THIS TOOK PLACE VERY QUICKLY, IT WAS ONLY A FEW SECONDS BEFORE RECOGNITION AND ACTION OF PUSH-OVER BEGAN. AT THE HIGH RATE OF CLB, INERTIA IMPEDED AN IMMEDIATE CLB STOP, AND AS WE WENT THROUGH 0 RATE OF CLB DOWN, THE SMA BECAME VISIBLE AT OUR 3 O'CLOCK. IT WAS SPOTTED BY THE FO, WHO SAID THE SMA WAS GOING IN THE OPPOSITE DIRECTION. I NEVER SAW IT. WHEN WE INFORMED DEP OF THE EVENT, HE DIDN'T SEEM TOO UPSET. THEN SAID ANOTHER SECTOR WAS WORKING THAT ACFT, AND THE SMA HAD US IN SIGHT. THE PRESENCE OF THE SMA WAS NEWS TO US. NEITHER TWR NOR DEP MENTIONED HIM, AND WE WOULD HAVE USED THE NORMAL SEE AND AVOID IF WE SUSPECTED AN ACFT ON OUR DEP PATH. EVIDENTLY, HE WAS ON SOME SORT OF LCL 'PHOTO' MISSION OR SOMETHING. I FEEL THAT THE ATC FOLKS FAILED THEIR DUTIES BY NOT MENTIONING THE SMA. THAT, COMBINED WITH OUR HIGH RATE OF CLB, HIGH DECK ANGLE, AND DOING THE NORMAL AFTER TKOF CHKLIST DUTIES, CONTRIBUTED TO A POTENTIALLY HAZARDOUS SIT WHICH COULD HAVE BEEN AVOIDED IF WE HAD BEEN INFORMED BY PHL DEP OF THE OTHER ACFT. I HAVE NO PROB FLYING NEAR OTHER ACFT IN A TCA, IF I ONLY KNOW OF THEM.

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.