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Flight crew of an large transport air carrier aircraft climbed above specified arrival altitude in response to a TCASII RA.
| Attributes | |
| ACN | 265266 |
| Time | |
| Date | 199403 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : aqn airport : dfw |
| State Reference | TX |
| Altitude | msl bound lower : 11000 msl bound upper : 12000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : dfw tower : mia |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach |
| Route In Use | arrival other arrival star : star |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | departure other departure sid : sid |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : flight engineer pilot : atp |
| Experience | flight time last 90 days : 70 flight time total : 5500 flight time type : 500 |
| ASRS Report | 265266 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other controllera other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 2000 vertical : 1000 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Response to an RA on our TCASII. The intruder was a radar controled airliner climbing to 10000 ft on the dfw departure. We were level at 11000 ft on the aqn 9 arrival. ATC issued a TA. TCASII issued a 'monitor vertical speed' alert. We saw the aircraft coming but then TCASII issued a 'climb, climb' alert and we followed it. We topped out at 12000 ft before coming back down. ATC heard our climb and then cleared us back down to 6000 ft. Uneventful landing followed. ATC did good. Crew did good. Other crew leveled at 10000 ft like they were supposed to. Strictly a software problem.
Original NASA ASRS Text
Title: FLC OF AN LGT ACR ACFT CLBED ABOVE SPECIFIED ARR ALT IN RESPONSE TO A TCASII RA.
Narrative: RESPONSE TO AN RA ON OUR TCASII. THE INTRUDER WAS A RADAR CTLED AIRLINER CLBING TO 10000 FT ON THE DFW DEP. WE WERE LEVEL AT 11000 FT ON THE AQN 9 ARR. ATC ISSUED A TA. TCASII ISSUED A 'MONITOR VERT SPD' ALERT. WE SAW THE ACFT COMING BUT THEN TCASII ISSUED A 'CLB, CLB' ALERT AND WE FOLLOWED IT. WE TOPPED OUT AT 12000 FT BEFORE COMING BACK DOWN. ATC HEARD OUR CLB AND THEN CLRED US BACK DOWN TO 6000 FT. UNEVENTFUL LNDG FOLLOWED. ATC DID GOOD. CREW DID GOOD. OTHER CREW LEVELED AT 10000 FT LIKE THEY WERE SUPPOSED TO. STRICTLY A SOFTWARE PROB.
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.