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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Air carrier light transport dfw-tul copied clearance to fly 360 degrees for tul. Turned to 010 degrees when able to read tul. Center wanted them to remain on 360 degree vector to tul. No conflicts.
| Attributes | |
| ACN | 371506 |
| Time | |
| Date | 199706 |
| Day | Tue |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : tul |
| State Reference | OK |
| Altitude | msl bound lower : 15000 msl bound upper : 15000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zfw |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | cruise other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Experience | flight time last 90 days : 240 flight time total : 2800 flight time type : 990 |
| ASRS Report | 371506 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : cfi |
| Experience | flight time last 90 days : 140 flight time total : 7700 flight time type : 1000 |
| ASRS Report | 370960 |
| Events | |
| Anomaly | non adherence : far non adherence : clearance other spatial deviation |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
After departing dfw for tul, we were assigned 15000 ft and various headings. At approximately 100-120 DME south of tul, ZFW said, 'turn left 360 degrees for tul.' after turning to a 360 degree heading, my CDI began to show a deviation left of course. In order to stay direct tul, I turned to a heading of 010 degrees, as this is what the captain and myself thought we were cleared to do. At approximately 60-80 mi south of tul, center asked if we were still on a 360 degree heading. When we said that we weren't, the controller said that we were supposed to be on a 360 degree heading. So we changed course as instructed. There were no traffic conflicts to the best of our knowledge. I believe that the cause of this deviation was due to a terminology problem. We believed that the assigned 360 degree heading for tul was a 'wag,' and that direct was approved when able. The terminology 360 degrees for tul was confusing. From now on, I will question ATC about nonstandard or differently phrased clrncs.
Original NASA ASRS Text
Title: ACR LTT DFW-TUL COPIED CLRNC TO FLY 360 DEGS FOR TUL. TURNED TO 010 DEGS WHEN ABLE TO READ TUL. CTR WANTED THEM TO REMAIN ON 360 DEG VECTOR TO TUL. NO CONFLICTS.
Narrative: AFTER DEPARTING DFW FOR TUL, WE WERE ASSIGNED 15000 FT AND VARIOUS HDGS. AT APPROX 100-120 DME S OF TUL, ZFW SAID, 'TURN L 360 DEGS FOR TUL.' AFTER TURNING TO A 360 DEG HDG, MY CDI BEGAN TO SHOW A DEV L OF COURSE. IN ORDER TO STAY DIRECT TUL, I TURNED TO A HDG OF 010 DEGS, AS THIS IS WHAT THE CAPT AND MYSELF THOUGHT WE WERE CLRED TO DO. AT APPROX 60-80 MI S OF TUL, CTR ASKED IF WE WERE STILL ON A 360 DEG HDG. WHEN WE SAID THAT WE WEREN'T, THE CTLR SAID THAT WE WERE SUPPOSED TO BE ON A 360 DEG HDG. SO WE CHANGED COURSE AS INSTRUCTED. THERE WERE NO TFC CONFLICTS TO THE BEST OF OUR KNOWLEDGE. I BELIEVE THAT THE CAUSE OF THIS DEV WAS DUE TO A TERMINOLOGY PROB. WE BELIEVED THAT THE ASSIGNED 360 DEG HDG FOR TUL WAS A 'WAG,' AND THAT DIRECT WAS APPROVED WHEN ABLE. THE TERMINOLOGY 360 DEGS FOR TUL WAS CONFUSING. FROM NOW ON, I WILL QUESTION ATC ABOUT NONSTANDARD OR DIFFERENTLY PHRASED CLRNCS.
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.