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Medium large transport air carrier received TCASII RA to descend followed by an RA to climb now. Flight crew followed TCASII directions.
| Attributes | |
| ACN | 334857 |
| Time | |
| Date | 199605 |
| Day | Sat |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : dag |
| State Reference | CA |
| Altitude | msl bound lower : 17000 msl bound upper : 17000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zla |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Gates Learjet Corp Undifferentiated or Other Model |
| Operating Under FAR Part | other : unknown |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 210 flight time total : 17000 flight time type : 1600 |
| ASRS Report | 334857 |
| 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 |
| Resolutory Action | flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 2000 vertical : 1000 |
| Supplementary | |
| Air Traffic Incident | other |
Narrative:
We accepted VFR climb to 17000 ft with IFR climb to FL230. Center called traffic at 2 O'clock 16000 ft, he had us in sight. It appeared to us we would clear traffic by 1000 ft but as we continued we got a TCASII RA to descend which we started to comply with. TCASII then told us to 'climb now' which we complied with. As we climbed the lear jet turned left and appeared to descend. He later asked us if we had a 'descend' RA and we told him it changed to a climb RA in the middle of our initial descent procedure. It was unusual for the TCASII to change commands during the descent procedure.
Original NASA ASRS Text
Title: MLG ACR RECEIVED TCASII RA TO DSND FOLLOWED BY AN RA TO CLB NOW. FLC FOLLOWED TCASII DIRECTIONS.
Narrative: WE ACCEPTED VFR CLB TO 17000 FT WITH IFR CLB TO FL230. CTR CALLED TFC AT 2 O'CLOCK 16000 FT, HE HAD US IN SIGHT. IT APPEARED TO US WE WOULD CLR TFC BY 1000 FT BUT AS WE CONTINUED WE GOT A TCASII RA TO DSND WHICH WE STARTED TO COMPLY WITH. TCASII THEN TOLD US TO 'CLB NOW' WHICH WE COMPLIED WITH. AS WE CLBED THE LEAR JET TURNED L AND APPEARED TO DSND. HE LATER ASKED US IF WE HAD A 'DSND' RA AND WE TOLD HIM IT CHANGED TO A CLB RA IN THE MIDDLE OF OUR INITIAL DSCNT PROC. IT WAS UNUSUAL FOR THE TCASII TO CHANGE COMMANDS DURING THE DSCNT PROC.
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.