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An SF340 flight crew accepts the clearance for a heading change issued to another aircraft on UHF during a split frequency operation 15 mi southwest of dfw, tx.
| Attributes | |
| ACN | 476780 |
| Time | |
| Date | 200006 |
| Day | Tue |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : dfw.airport |
| State Reference | TX |
| Altitude | msl single value : 4000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : d10.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | SF 340A |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach descent : intermediate altitude |
| Route In Use | arrival : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : multi engine pilot : instrument pilot : atp pilot : commercial |
| Experience | flight time last 90 days : 180 flight time total : 6900 flight time type : 3000 |
| ASRS Report | 476780 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument pilot : multi engine |
| Events | |
| Anomaly | non adherence : clearance other anomaly other other spatial deviation |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued advisory flight crew : returned to intended or assigned course |
| Consequence | faa : reviewed incident with flight crew |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Airspace Structure ATC Human Performance |
| Primary Problem | Airspace Structure |
| Air Traffic Incident | Pilot Deviation |
Narrative:
We were on a heading of 240 degrees. Turned to a heading of 170 degrees that we thought the controller gave us. He then told us to turn back to a heading of 240 degrees. Later he said that vector was not for us. When we read back the turn to 170 degrees we did not get a response back, therefore, no reason not to assume it was not for us. The controller later told us that it was for another aircraft on UHF. He was working both UHF and VHF. Since we can not monitor UHF we did not hear the other aircraft respond. This would have helped us determine that this turn was not for us.
Original NASA ASRS Text
Title: AN SF340 FLC ACCEPTS THE CLRNC FOR A HDG CHANGE ISSUED TO ANOTHER ACFT ON UHF DURING A SPLIT FREQ OP 15 MI SW OF DFW, TX.
Narrative: WE WERE ON A HDG OF 240 DEGS. TURNED TO A HDG OF 170 DEGS THAT WE THOUGHT THE CTLR GAVE US. HE THEN TOLD US TO TURN BACK TO A HDG OF 240 DEGS. LATER HE SAID THAT VECTOR WAS NOT FOR US. WHEN WE READ BACK THE TURN TO 170 DEGS WE DID NOT GET A RESPONSE BACK, THEREFORE, NO REASON NOT TO ASSUME IT WAS NOT FOR US. THE CTLR LATER TOLD US THAT IT WAS FOR ANOTHER ACFT ON UHF. HE WAS WORKING BOTH UHF AND VHF. SINCE WE CAN NOT MONITOR UHF WE DID NOT HEAR THE OTHER ACFT RESPOND. THIS WOULD HAVE HELPED US DETERMINE THAT THIS TURN WAS NOT FOR US.
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.