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2 air carrier flts are almost head on at the same altitude and perform TCASII sponsored evasive actions descent climb prior to ATC recognizing the conflict 75 mi northwest of ewm, tx.
| Attributes | |
| ACN | 473740 |
| Time | |
| Date | 200005 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | navaid : ewm.vortac |
| State Reference | TX |
| Altitude | msl single value : 28000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zab.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zab.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | MD-80 Series (DC-9-80) Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 210 flight time total : 10000 |
| ASRS Report | 473740 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : multi engine pilot : commercial |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure non adherence : required legal separation other anomaly other other spatial deviation |
| Independent Detector | aircraft equipment : tcas other flight crewa other flight crewb |
| Resolutory Action | controller : issued new clearance |
| Consequence | faa : investigated faa : reviewed incident with flight crew |
| Miss Distance | horizontal : 18000 vertical : 700 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
TCASII RA at FL280. Saw traffic MD80 at FL280 converging from 10 O'clock position. TCASII stated 'traffic.' at that time MD80 told ATC of their TCASII RA to climb, our TCASII stated, 'descend.' ZAB was trying to tell us to descend but MD80 overstepped the transmission on 3 occasions. We had the MD80 in sight the entire time. He initiated a climbing right turn, we initiated a descending right turn. I estimate we were within 700 ft (according to TCASII and 3 mi according to TCASII). We stopped our descent 100 ft low. Abq then finally was able to tell us to descend. I recognized no more conflict and told this to abq. He said, 'don't descend anymore.' MD80 asked abq if his 'bells and whistles' went off. He acknowledged that and stated an apology and that it was his (ZAB) fault. We descended and switched frequencys with no other events.
Original NASA ASRS Text
Title: 2 ACR FLTS ARE ALMOST HEAD ON AT THE SAME ALT AND PERFORM TCASII SPONSORED EVASIVE ACTIONS DSCNT CLB PRIOR TO ATC RECOGNIZING THE CONFLICT 75 MI NW OF EWM, TX.
Narrative: TCASII RA AT FL280. SAW TFC MD80 AT FL280 CONVERGING FROM 10 O'CLOCK POS. TCASII STATED 'TFC.' AT THAT TIME MD80 TOLD ATC OF THEIR TCASII RA TO CLB, OUR TCASII STATED, 'DSND.' ZAB WAS TRYING TO TELL US TO DSND BUT MD80 OVERSTEPPED THE XMISSION ON 3 OCCASIONS. WE HAD THE MD80 IN SIGHT THE ENTIRE TIME. HE INITIATED A CLBING R TURN, WE INITIATED A DSNDING R TURN. I ESTIMATE WE WERE WITHIN 700 FT (ACCORDING TO TCASII AND 3 MI ACCORDING TO TCASII). WE STOPPED OUR DSCNT 100 FT LOW. ABQ THEN FINALLY WAS ABLE TO TELL US TO DSND. I RECOGNIZED NO MORE CONFLICT AND TOLD THIS TO ABQ. HE SAID, 'DON'T DSND ANYMORE.' MD80 ASKED ABQ IF HIS 'BELLS AND WHISTLES' WENT OFF. HE ACKNOWLEDGED THAT AND STATED AN APOLOGY AND THAT IT WAS HIS (ZAB) FAULT. WE DSNDED AND SWITCHED FREQS WITH NO OTHER EVENTS.
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.