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TCAS ii alert startles flight crew distraction aircraft equipment problem so that they create a heading track altitude deviation.
| Attributes | |
| ACN | 168414 |
| Time | |
| Date | 199101 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : aqn |
| State Reference | TX |
| Altitude | msl bound lower : 11000 msl bound upper : 11100 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | cruise other |
| Route In Use | arrival other arrival star : star enroute airway : dfw |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 75 flight time total : 9500 flight time type : 75 |
| ASRS Report | 168414 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude non adherence : clearance other anomaly other other spatial deviation |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course none taken : insufficient time |
| Consequence | Other |
| Miss Distance | horizontal : 0 vertical : 900 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation other |
Narrative:
On acton 1 STAR, just about over 'creek' (aqn 040/32) at 11000' on autoplt and altitude hold, first officer flying. In a space of about 15 or 20 seconds, the following happened: saw approaching departure traffic, low, couple of mi out. TCAS gave traffic alert for the 1 O'clock traffic. ATC reported same traffic, 10000'. TCAS gave 'resolution alert' (RA), called for 1500 FPM climb. ATC cleared us to descend to 6000'. TCAS gave 'clear of traffic.' first officer was very reluctant to comply with RA, since we were sure we had seen it (the opp direction traffic) and it couldn't have hit us if it tried, and he climbed only about 100' before starting down. Maybe ATC cleared the departure traffic to climb a bit soon, at least for the TCAS. The resulting confusion caused us to be about 3 NM late turning to 350 degrees (published) at creek and to be a little slow starting down. First time with an operating TCAS, and I'm trying to be open-minded. So far I think TCAS is very distraction much like a video game. The aural warning on this airplane was much too loud, so as to be startling rather than just attention getting. It's also obvious it will take some time to 'learn' to respond to the thing.
Original NASA ASRS Text
Title: TCAS II ALERT STARTLES FLT CREW DISTR ACFT EQUIPMENT PROBLEM SO THAT THEY CREATE A HDG TRACK ALT DEVIATION.
Narrative: ON ACTON 1 STAR, JUST ABOUT OVER 'CREEK' (AQN 040/32) AT 11000' ON AUTOPLT AND ALT HOLD, F/O FLYING. IN A SPACE OF ABOUT 15 OR 20 SECS, THE FOLLOWING HAPPENED: SAW APCHING DEP TFC, LOW, COUPLE OF MI OUT. TCAS GAVE TFC ALERT FOR THE 1 O'CLOCK TFC. ATC RPTED SAME TFC, 10000'. TCAS GAVE 'RESOLUTION ALERT' (RA), CALLED FOR 1500 FPM CLB. ATC CLRED US TO DSND TO 6000'. TCAS GAVE 'CLR OF TFC.' F/O WAS VERY RELUCTANT TO COMPLY WITH RA, SINCE WE WERE SURE WE HAD SEEN IT (THE OPP DIRECTION TFC) AND IT COULDN'T HAVE HIT US IF IT TRIED, AND HE CLBED ONLY ABOUT 100' BEFORE STARTING DOWN. MAYBE ATC CLRED THE DEP TFC TO CLB A BIT SOON, AT LEAST FOR THE TCAS. THE RESULTING CONFUSION CAUSED US TO BE ABOUT 3 NM LATE TURNING TO 350 DEGS (PUBLISHED) AT CREEK AND TO BE A LITTLE SLOW STARTING DOWN. FIRST TIME WITH AN OPERATING TCAS, AND I'M TRYING TO BE OPEN-MINDED. SO FAR I THINK TCAS IS VERY DISTR MUCH LIKE A VIDEO GAME. THE AURAL WARNING ON THIS AIRPLANE WAS MUCH TOO LOUD, SO AS TO BE STARTLING RATHER THAN JUST ATTN GETTING. IT'S ALSO OBVIOUS IT WILL TAKE SOME TIME TO 'LEARN' TO RESPOND TO THE THING.
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.