 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
A B757-200 crew reports erratic track deviations on the ord bradford 3 (BDF3) arrival. ATC stated that other B757 aircraft have experienced this deviation.
| Attributes | |
| ACN | 677108 |
| Time | |
| Date | 200511 |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | navaid : bdf.vortac |
| State Reference | IL |
| Altitude | msl single value : 27000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zau.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : intermediate altitude |
| Route In Use | arrival star : bradford |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| ASRS Report | 677108 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | non adherence : clearance non adherence : published procedure other spatial deviation |
| Resolutory Action | none taken : anomaly accepted |
| Consequence | faa : reviewed incident with flight crew |
| Supplementary | |
| Problem Areas | Aircraft Company |
| Primary Problem | Aircraft |
Narrative:
While flying on the bdf arrival to ord; between bdf and benky; we experienced a slow but steady map shift up to 3 miles. The captain stated that this had happened to him on his previous two flts over this arrival in this same location in the past week. He stated that last night he reported the situation to ATC; and they indicated they had no other reports of map shifts in this area. However; this evening when we reported it to ATC; the controller indicated that there was a problem but it was only affecting B757's. The map shift appeared to be most noticeable halfway between bdf and benky; however; everything was back to normal by newrk. To our knowledge; there were no illegal electronic devices in use by our passenger during this event. Upon landing; the error check of the INS showed position to be within 1 NM of each other.
Original NASA ASRS Text
Title: A B757-200 CREW RPTS ERRATIC TRACK DEVS ON THE ORD BRADFORD 3 (BDF3) ARR. ATC STATED THAT OTHER B757 ACFT HAVE EXPERIENCED THIS DEV.
Narrative: WHILE FLYING ON THE BDF ARR TO ORD; BETWEEN BDF AND BENKY; WE EXPERIENCED A SLOW BUT STEADY MAP SHIFT UP TO 3 MILES. THE CAPT STATED THAT THIS HAD HAPPENED TO HIM ON HIS PREVIOUS TWO FLTS OVER THIS ARR IN THIS SAME LOCATION IN THE PAST WEEK. HE STATED THAT LAST NIGHT HE RPTED THE SIT TO ATC; AND THEY INDICATED THEY HAD NO OTHER RPTS OF MAP SHIFTS IN THIS AREA. HOWEVER; THIS EVENING WHEN WE RPTED IT TO ATC; THE CTLR INDICATED THAT THERE WAS A PROB BUT IT WAS ONLY AFFECTING B757'S. THE MAP SHIFT APPEARED TO BE MOST NOTICEABLE HALFWAY BETWEEN BDF AND BENKY; HOWEVER; EVERYTHING WAS BACK TO NORMAL BY NEWRK. TO OUR KNOWLEDGE; THERE WERE NO ILLEGAL ELECTRONIC DEVICES IN USE BY OUR PAX DURING THIS EVENT. UPON LNDG; THE ERROR CHK OF THE INS SHOWED POSITION TO BE WITHIN 1 NM OF EACH OTHER.
Data retrieved from NASA's ASRS site as of January 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.