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An air carrier md-88 reacted to its TCASII and to a VFR cheyenne that was legally flying at a VFR altitude.
| Attributes | |
| ACN | 266765 |
| Time | |
| Date | 199403 |
| Day | Thu |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : scy airport : dfw |
| State Reference | TX |
| Altitude | msl bound lower : 11000 msl bound upper : 11500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zma |
| Operator | common carrier : air carrier |
| Make Model Name | MD-88 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | cruise other |
| Route In Use | arrival other arrival star : star enroute airway : dfw |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Piper Twin Turboprop Undifferentiated or Other Model |
| Operating Under FAR Part | other : unknown |
| Flight Phase | cruise other |
| Flight Plan | VFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 6000 flight time type : 350 |
| ASRS Report | 266765 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude non adherence : clearance other anomaly other |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | flight crew : took evasive action other |
| Consequence | faa : reviewed incident with flight crew |
| Miss Distance | horizontal : 1000 vertical : 1000 |
| Supplementary | |
| Air Traffic Incident | Pilot Deviation |
Narrative:
I was level 250 KTS, 11000 ft with dfw approach. Approach called traffic 12 O'clock, climbing to 10500 ft. TCASII showed TA, then RA to climb. We smoothly climbed to 11500 ft and the RA ceased. Traffic spotted passing under our nose about 1000 ft below us. As we descended back to 11000 ft, a different controller advised us to return to 11000 ft when possible. Flight continued to dfw uneventfully. No near miss filed since TCASII warning did enable us to avoid traffic by 1000 ft. The TCASII system worked well. I do not know why the cheyenne was at 10500 ft. Approach was very busy to query about it.
Original NASA ASRS Text
Title: AN ACR MD-88 REACTED TO ITS TCASII AND TO A VFR CHEYENNE THAT WAS LEGALLY FLYING AT A VFR ALT.
Narrative: I WAS LEVEL 250 KTS, 11000 FT WITH DFW APCH. APCH CALLED TFC 12 O'CLOCK, CLBING TO 10500 FT. TCASII SHOWED TA, THEN RA TO CLB. WE SMOOTHLY CLBED TO 11500 FT AND THE RA CEASED. TFC SPOTTED PASSING UNDER OUR NOSE ABOUT 1000 FT BELOW US. AS WE DSNDED BACK TO 11000 FT, A DIFFERENT CTLR ADVISED US TO RETURN TO 11000 FT WHEN POSSIBLE. FLT CONTINUED TO DFW UNEVENTFULLY. NO NEAR MISS FILED SINCE TCASII WARNING DID ENABLE US TO AVOID TFC BY 1000 FT. THE TCASII SYS WORKED WELL. I DO NOT KNOW WHY THE CHEYENNE WAS AT 10500 FT. APCH WAS VERY BUSY TO QUERY ABOUT IT.
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.