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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Unfamiliar with the universal FMS system; flight crew of E145 experience track deviation when the programmed STAR fixes disappear when a subsequent runway change is programmed.
| Attributes | |
| ACN | 772031 |
| Time | |
| Date | 200801 |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : dfw.airport |
| State Reference | TX |
| Altitude | msl single value : 11000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : d10.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | EMB ERJ 145 ER&LR |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | descent : intermediate altitude |
| Route In Use | arrival star : n/s |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 772031 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| ASRS Report | 772030 |
| Events | |
| Anomaly | aircraft equipment problem : less severe non adherence : clearance other spatial deviation |
| Independent Detector | other controllerb other flight crewa |
| Resolutory Action | controller : issued advisory controller : issued new clearance |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance ATC Human Performance Aircraft |
| Primary Problem | Aircraft |
| Air Traffic Incident | Pilot Deviation |
Narrative:
On ukw (bowie) arrival to dfw. Assigned hold at ukw so the dfw airport could change confign. Dfw turned dfw from south flow to north flow. I personally changed the FMS #1 runway to runway 36L; checked the fixes and continued the hold. ATC assigned 2 headings out of the hold 240 degrees; then 180 degrees then direct boids and the remainder of the ukw arrival. Boids; then rubee at 11000 ft; siler next. Unexpectedly the aircraft turned south; I was analyzing the problem; the track and heading appeared to be incorrect. First officer observed FMS #1 had advanced to allen when the next fix was actually siler. Manually typed in siler and headed direct to siler. ATC called and assigned a heading of 130 degrees and stated that we should be going direct to siler. We advised that we were going direct to siler. Then advised ATC that the FMS had dropped siler after entering the runway change. First officer advised that he had seen some FMS's drop fixes when changing the runway only. This apparently does not occur if you change both the approach and the runway.
Original NASA ASRS Text
Title: UNFAMILIAR WITH THE UNIVERSAL FMS SYSTEM; FLT CREW OF E145 EXPERIENCE TRACK DEVIATION WHEN THE PROGRAMMED STAR FIXES DISAPPEAR WHEN A SUBSEQUENT RWY CHANGE IS PROGRAMMED.
Narrative: ON UKW (BOWIE) ARR TO DFW. ASSIGNED HOLD AT UKW SO THE DFW ARPT COULD CHANGE CONFIGN. DFW TURNED DFW FROM S FLOW TO N FLOW. I PERSONALLY CHANGED THE FMS #1 RWY TO RWY 36L; CHKED THE FIXES AND CONTINUED THE HOLD. ATC ASSIGNED 2 HDGS OUT OF THE HOLD 240 DEGS; THEN 180 DEGS THEN DIRECT BOIDS AND THE REMAINDER OF THE UKW ARR. BOIDS; THEN RUBEE AT 11000 FT; SILER NEXT. UNEXPECTEDLY THE ACFT TURNED S; I WAS ANALYZING THE PROB; THE TRACK AND HDG APPEARED TO BE INCORRECT. FO OBSERVED FMS #1 HAD ADVANCED TO ALLEN WHEN THE NEXT FIX WAS ACTUALLY SILER. MANUALLY TYPED IN SILER AND HEADED DIRECT TO SILER. ATC CALLED AND ASSIGNED A HDG OF 130 DEGS AND STATED THAT WE SHOULD BE GOING DIRECT TO SILER. WE ADVISED THAT WE WERE GOING DIRECT TO SILER. THEN ADVISED ATC THAT THE FMS HAD DROPPED SILER AFTER ENTERING THE RWY CHANGE. FO ADVISED THAT HE HAD SEEN SOME FMS'S DROP FIXES WHEN CHANGING THE RWY ONLY. THIS APPARENTLY DOES NOT OCCUR IF YOU CHANGE BOTH THE APCH AND THE RWY.
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.