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Medium large transport flight has TCASII TA then RA to descend. Started down. Sighted traffic below. TCASII says to climb. After traffic passes, descends.
| Attributes | |
| ACN | 217743 |
| Time | |
| Date | 199208 |
| Day | Mon |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : sac |
| State Reference | CA |
| Altitude | msl bound lower : 11000 msl bound upper : 11600 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zoa |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | climbout : intermediate altitude cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : flight engineer pilot : cfi pilot : atp pilot : instrument |
| Experience | flight time last 90 days : 150 flight time total : 9000 flight time type : 450 |
| ASRS Report | 217743 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : clearance other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | flight crew : took evasive action |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation other |
Narrative:
I was first officer on flight from sac-lax. Climbing out of sac on heading 120 degrees, level flight 11000, TCASII gave a TA, then conflict, monitor vsi. Then TCASII said to descend 2000/2500 FPM. I started down and the captain advised ATC. Then we had a visual on traffic, could see it was below at 10 O'clock. At which time I started a climb. At the same time, TCASII said to climb. I leveled off at 11600 ft, traffic passed behind and below. I descended to 11000 ft. ATC was never in contact with traffic.
Original NASA ASRS Text
Title: MLG FLT HAS TCASII TA THEN RA TO DSND. STARTED DOWN. SIGHTED TFC BELOW. TCASII SAYS TO CLB. AFTER TFC PASSES, DSNDS.
Narrative: I WAS FO ON FLT FROM SAC-LAX. CLBING OUT OF SAC ON HDG 120 DEGS, LEVEL FLT 11000, TCASII GAVE A TA, THEN CONFLICT, MONITOR VSI. THEN TCASII SAID TO DSND 2000/2500 FPM. I STARTED DOWN AND THE CAPT ADVISED ATC. THEN WE HAD A VISUAL ON TFC, COULD SEE IT WAS BELOW AT 10 O'CLOCK. AT WHICH TIME I STARTED A CLB. AT THE SAME TIME, TCASII SAID TO CLB. I LEVELED OFF AT 11600 FT, TFC PASSED BEHIND AND BELOW. I DSNDED TO 11000 FT. ATC WAS NEVER IN CONTACT WITH TFC.
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.