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B737 flight crew initiate evasive TCASII RA climb in conjunction with D10 climb clearance due to conflicting traffic at same altitude.
| Attributes | |
| ACN | 445357 |
| Time | |
| Date | 199908 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : dal.airport |
| State Reference | TX |
| Altitude | msl single value : 17000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other vortac |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | departure : on vectors departure sid : texoma 5 |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : d10.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | Fokker BV Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Route In Use | enroute other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 240 flight time total : 12000 |
| ASRS Report | 445357 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : multi engine pilot : instrument pilot : commercial |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude conflict : airborne critical non adherence : company policies non adherence : published procedure non adherence : required legal separation |
| Independent Detector | aircraft equipment : tcas other flight crewa other flight crewb |
| Resolutory Action | controller : issued new clearance |
| Miss Distance | vertical : 500 |
| Supplementary | |
| Problem Areas | ATC Human Performance Airspace Structure Flight Crew Human Performance |
| Primary Problem | ATC Human Performance |
Narrative:
We were flying a departure from dal to tul. We had been at an intermediate leveloff of 17000 ft for several mins. We had a TA and acquired on TCASII a target at 16500 ft off the nose. Almost simultaneously we got a call from regional departure (I think, although we may have been with ZFW) to first turn 10 degrees right and start a descent. Then almost immediately we got a climb RA. Then almost simultaneously the controller said maintain 340 degree heading (which we had been on for several mins) and climb to FL180. We complied and as I was looking for the target I knew to be at 16500 ft, I saw a fokker jet at about my 7-8 O'clock position at about the same altitude. He may have taken some evasive action. I heard him later say on the radio that he had gotten a descend RA from 17000 ft which was also his assigned altitude. He stated that 'he didn't want to follow the RA because of the light aircraft at 16500 ft.' it was a pretty tense moment for both air carrier's. I don't know if the small aircraft was on any frequency, we never heard him. I hesitate to say we took evasive action because our climb from the controller was almost coincidental with the RA. I estimate the distance when I saw the jet to be about 15 mi.
Original NASA ASRS Text
Title: B737 FLC INITIATE EVASIVE TCASII RA CLB IN CONJUNCTION WITH D10 CLB CLRNC DUE TO CONFLICTING TFC AT SAME ALT.
Narrative: WE WERE FLYING A DEP FROM DAL TO TUL. WE HAD BEEN AT AN INTERMEDIATE LEVELOFF OF 17000 FT FOR SEVERAL MINS. WE HAD A TA AND ACQUIRED ON TCASII A TARGET AT 16500 FT OFF THE NOSE. ALMOST SIMULTANEOUSLY WE GOT A CALL FROM REGIONAL DEP (I THINK, ALTHOUGH WE MAY HAVE BEEN WITH ZFW) TO FIRST TURN 10 DEGS R AND START A DSCNT. THEN ALMOST IMMEDIATELY WE GOT A CLB RA. THEN ALMOST SIMULTANEOUSLY THE CTLR SAID MAINTAIN 340 DEG HDG (WHICH WE HAD BEEN ON FOR SEVERAL MINS) AND CLB TO FL180. WE COMPLIED AND AS I WAS LOOKING FOR THE TARGET I KNEW TO BE AT 16500 FT, I SAW A FOKKER JET AT ABOUT MY 7-8 O'CLOCK POS AT ABOUT THE SAME ALT. HE MAY HAVE TAKEN SOME EVASIVE ACTION. I HEARD HIM LATER SAY ON THE RADIO THAT HE HAD GOTTEN A DSND RA FROM 17000 FT WHICH WAS ALSO HIS ASSIGNED ALT. HE STATED THAT 'HE DIDN'T WANT TO FOLLOW THE RA BECAUSE OF THE LIGHT ACFT AT 16500 FT.' IT WAS A PRETTY TENSE MOMENT FOR BOTH ACR'S. I DON'T KNOW IF THE SMALL ACFT WAS ON ANY FREQ, WE NEVER HEARD HIM. I HESITATE TO SAY WE TOOK EVASIVE ACTION BECAUSE OUR CLB FROM THE CTLR WAS ALMOST COINCIDENTAL WITH THE RA. I ESTIMATE THE DISTANCE WHEN I SAW THE JET TO BE ABOUT 15 MI.
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.