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Air carrier with ZOA climbing from FL230 to FL280 received TCAS RA observing crossing air carrier traffic; no traffic issued by ATC.
| Attributes | |
| ACN | 772680 |
| Time | |
| Date | 200802 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : oak.airport |
| State Reference | CA |
| Altitude | msl single value : 23000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zoa.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B737-500 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude cruise : enroute altitude change |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Experience | flight time last 90 days : 244 |
| ASRS Report | 772680 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Experience | flight time last 90 days : 160 flight time type : 1000 |
| ASRS Report | 772509 |
| Events | |
| Anomaly | conflict : airborne critical non adherence : required legal separation |
| Independent Detector | aircraft equipment : tcas other flight crewa other flight crewb |
| Resolutory Action | flight crew : took evasive action |
| Miss Distance | horizontal : 18000 vertical : 900 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
I was the PF. We were level at FL230 when we were cleared to climb to FL280. Shortly after I initiated a climb at 1500 FPM; we received a TCAS RA. The captain was quick to react; took control of the aircraft; and methodically pushed the nose of the aircraft over to comply with the RA. I xferred my eyes outside to see another carrier passing right to left just above us. I looked at the TCAS to see what altitude they were at and noticed they were +900 ft and within the 3 mi range (range ring at 10 mi) as we were descending per the RA through FL234. A little while after the event we were cleared to FL300 with no mention about the conflict by another controller.
Original NASA ASRS Text
Title: ACR WITH ZOA CLIMBING FROM FL230 TO FL280 RECEIVED TCAS RA OBSERVING CROSSING ACR TFC; NO TFC ISSUED BY ATC.
Narrative: I WAS THE PF. WE WERE LEVEL AT FL230 WHEN WE WERE CLRED TO CLB TO FL280. SHORTLY AFTER I INITIATED A CLB AT 1500 FPM; WE RECEIVED A TCAS RA. THE CAPT WAS QUICK TO REACT; TOOK CTL OF THE ACFT; AND METHODICALLY PUSHED THE NOSE OF THE ACFT OVER TO COMPLY WITH THE RA. I XFERRED MY EYES OUTSIDE TO SEE ANOTHER CARRIER PASSING R TO L JUST ABOVE US. I LOOKED AT THE TCAS TO SEE WHAT ALT THEY WERE AT AND NOTICED THEY WERE +900 FT AND WITHIN THE 3 MI RANGE (RANGE RING AT 10 MI) AS WE WERE DSNDING PER THE RA THROUGH FL234. A LITTLE WHILE AFTER THE EVENT WE WERE CLRED TO FL300 WITH NO MENTION ABOUT THE CONFLICT BY ANOTHER CTLR.
Data retrieved from NASA's ASRS site as of May 2009 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.