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Large transport at cruise has TCASII RA. Responds with climb, turn and notifies ATC.
| Attributes | |
| ACN | 207248 |
| Time | |
| Date | 199204 |
| Day | Sun |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : phx |
| State Reference | AZ |
| Altitude | msl bound lower : 34000 msl bound upper : 35000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zab |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | descent other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 8000 flight time type : 500 |
| ASRS Report | 207248 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : atp pilot : commercial |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude non adherence : clearance other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 6000 vertical : 700 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | other |
Narrative:
We were flying a 4 hour flight from ord to san at 35000 ft when suddenly the cockpit silence was broken by a TCASII traffic alert. I looked at TCASII and saw that the targetþs altitude was closing on ours! The TA was followed shortly by an RA when the target (air carrier B) was 700 ft below us. We followed the RA into a climb while turning right (away from the traffic which I could now see) and notified center of our actions. The air carrier B flight started a right descending turn. Simultaneously, ZAB cleared us to FL390 and air carrier B to FL290. We passed without incident. I do not know if this incident was caused by center or the air carrier B pilots flying through their assigned altitude? I don know that TCASII saved us from a potentially dangerous situation. Iþm glad it was there!
Original NASA ASRS Text
Title: LGT AT CRUISE HAS TCASII RA. RESPONDS WITH CLB, TURN AND NOTIFIES ATC.
Narrative: WE WERE FLYING A 4 HR FLT FROM ORD TO SAN AT 35000 FT WHEN SUDDENLY THE COCKPIT SILENCE WAS BROKEN BY A TCASII TFC ALERT. I LOOKED AT TCASII AND SAW THAT THE TARGETþS ALT WAS CLOSING ON OURS! THE TA WAS FOLLOWED SHORTLY BY AN RA WHEN THE TARGET (ACR B) WAS 700 FT BELOW US. WE FOLLOWED THE RA INTO A CLB WHILE TURNING R (AWAY FROM THE TFC WHICH I COULD NOW SEE) AND NOTIFIED CTR OF OUR ACTIONS. THE ACR B FLT STARTED A R DSNDING TURN. SIMULTANEOUSLY, ZAB CLRED US TO FL390 AND ACR B TO FL290. WE PASSED WITHOUT INCIDENT. I DO NOT KNOW IF THIS INCIDENT WAS CAUSED BY CTR OR THE ACR B PLTS FLYING THROUGH THEIR ASSIGNED ALT? I DON KNOW THAT TCASII SAVED US FROM A POTENTIALLY DANGEROUS SITUATION. IþM GLAD IT WAS THERE!
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.