 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
A CL65 flight crew is slow to enter new assigned course into FMS and ATC gives new heading which the flight crew misunderstood.
| Attributes | |
| ACN | 579042 |
| Time | |
| Date | 200304 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | navaid : lib.vortac |
| State Reference | NC |
| Altitude | msl single value : 33000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : ztl.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Regional Jet CL65, Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | cruise : level cruise : enroute altitude change |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : instrument pilot : cfi pilot : multi engine pilot : atp |
| Experience | flight time last 90 days : 100 flight time total : 4100 flight time type : 2700 |
| ASRS Report | 579042 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : multi engine pilot : instrument |
| Experience | flight time last 90 days : 200 flight time total : 2200 flight time type : 1500 |
| ASRS Report | 579278 |
| Events | |
| Anomaly | aircraft equipment problem : less severe non adherence : clearance other spatial deviation |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance flight crew : returned to intended or assigned course |
| Consequence | faa : reviewed incident with flight crew |
| Supplementary | |
| Problem Areas | ATC Human Performance Aircraft Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
Narrative:
We were assigned a heading of 120 degrees for traffic. Later we were given direct lib VOR. I programmed it in the FMS and engaged navigation mode. It did not engage, so I pressed it again. It engaged and while it calculated the turn and began its bank, ATC asked why we had not turned. He issued a turn to 090 degrees. We both understood this to be a heading of 090 degrees. In the turn we were given a descent to FL310 and we asked if he wanted us on a 090 degree heading and he said no, he wanted 90 degrees to the left. The clearance was originally understood to be, turn left 090 degrees. No conflict occurred and no TCASII alerts.
Original NASA ASRS Text
Title: A CL65 FLT CREW IS SLOW TO ENTER NEW ASSIGNED COURSE INTO FMS AND ATC GIVES NEW HEADING WHICH THE FLT CREW MISUNDERSTOOD.
Narrative: WE WERE ASSIGNED A HEADING OF 120 DEGS FOR TFC. LATER WE WERE GIVEN DIRECT LIB VOR. I PROGRAMMED IT IN THE FMS AND ENGAGED NAV MODE. IT DID NOT ENGAGE, SO I PRESSED IT AGAIN. IT ENGAGED AND WHILE IT CALCULATED THE TURN AND BEGAN ITS BANK, ATC ASKED WHY WE HAD NOT TURNED. HE ISSUED A TURN TO 090 DEGS. WE BOTH UNDERSTOOD THIS TO BE A HEADING OF 090 DEGS. IN THE TURN WE WERE GIVEN A DSCNT TO FL310 AND WE ASKED IF HE WANTED US ON A 090 DEG HDG AND HE SAID NO, HE WANTED 90 DEGS TO THE L. THE CLRNC WAS ORIGINALLY UNDERSTOOD TO BE, TURN L 090 DEGS. NO CONFLICT OCCURRED AND NO TCASII ALERTS.
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.