|37000 Feet||Browse and search NASA's
Aviation Safety Reporting System
|Local Time Of Day||0601 To 1200|
|Locale Reference||airport : sux|
|Altitude||msl bound lower : 2000|
msl bound upper : 7000
|Controlling Facilities||artcc : zmp|
tracon : sux
|Operator||common carrier : air carrier|
|Make Model Name||Medium Transport, Low Wing, 2 Turboprop Eng|
|Flight Phase||climbout : intermediate altitude|
|Affiliation||company : air carrier|
|Function||flight crew : captain|
oversight : pic
|Qualification||pilot : atp|
|Experience||flight time last 90 days : 250|
flight time total : 7000
|Function||flight crew : first officer|
|Qualification||pilot : instrument|
pilot : commercial
|Anomaly||non adherence : clearance|
other anomaly other
|Independent Detector||other flight crewa|
|Primary Problem||Flight Crew Human Performance|
|Air Traffic Incident||other|
First officer listened to ATIS prior to 0x00 local time, prior to opening of control tower. ATIS said to contact mps center on 124.1 for sux WX and IFR clearance. First officer wrote 124.1 down in clearance section of load manifest. We began to taxi at 0x02 local time. First officer copied down IFR clearance from sux ground control with departure control listed as 124.6. First officer set radios up for departure and mis-set sux departure control as 124.7. Tower was contacted and we received a clearance to take off. Climbing through approximately 2000' MSL sux tower told us to contact departure. First officer was flying aircraft. I switched frequency (124.7) and tried to call, but of course received no answer. I asked first officer if he was sure that we had the right frequency. He looked at the clearance and saw 124.1 which he had written from earlier ATIS. He told me, 'no, we should be on 124.1.' I switched frequency and called out of 2600' MSL for 5000' MSL to sux departure control. Msp center acknowledged our call but failed to identify themselves as msp center. We exchanged several xmissions, were cleared to intercept the arwy and climb to 17000' MSL. I still did not realize I was talking to msp center instead of sux departure control. We ran the climb checklist and out of about 7000' MSL I heard msp center begin communicating with other aircraft and realized I was on msp center. Careful preprogram would have helped prevent this. Also, if msp center had identified themselves during our initial callup, would have helped. Also, the use of very similar frequencys in close proximity was a major factor. Frequencys should be split so different frequencys are used.
Original NASA ASRS Text
Title: ACR MDT FREQ CHANGE WRONG DURING DEP FROM SUX.
Narrative: F/O LISTENED TO ATIS PRIOR TO 0X00 LCL TIME, PRIOR TO OPENING OF CTL TWR. ATIS SAID TO CONTACT MPS CENTER ON 124.1 FOR SUX WX AND IFR CLRNC. F/O WROTE 124.1 DOWN IN CLRNC SECTION OF LOAD MANIFEST. WE BEGAN TO TAXI AT 0X02 LCL TIME. F/O COPIED DOWN IFR CLRNC FROM SUX GND CTL WITH DEP CTL LISTED AS 124.6. F/O SET RADIOS UP FOR DEP AND MIS-SET SUX DEP CTL AS 124.7. TWR WAS CONTACTED AND WE RECEIVED A CLRNC TO TAKE OFF. CLBING THROUGH APPROX 2000' MSL SUX TWR TOLD US TO CONTACT DEP. F/O WAS FLYING ACFT. I SWITCHED FREQ (124.7) AND TRIED TO CALL, BUT OF COURSE RECEIVED NO ANSWER. I ASKED F/O IF HE WAS SURE THAT WE HAD THE RIGHT FREQ. HE LOOKED AT THE CLRNC AND SAW 124.1 WHICH HE HAD WRITTEN FROM EARLIER ATIS. HE TOLD ME, 'NO, WE SHOULD BE ON 124.1.' I SWITCHED FREQ AND CALLED OUT OF 2600' MSL FOR 5000' MSL TO SUX DEP CTL. MSP CENTER ACKNOWLEDGED OUR CALL BUT FAILED TO IDENTIFY THEMSELVES AS MSP CENTER. WE EXCHANGED SEVERAL XMISSIONS, WERE CLRED TO INTERCEPT THE ARWY AND CLB TO 17000' MSL. I STILL DID NOT REALIZE I WAS TALKING TO MSP CENTER INSTEAD OF SUX DEP CTL. WE RAN THE CLB CHKLIST AND OUT OF ABOUT 7000' MSL I HEARD MSP CENTER BEGIN COMMUNICATING WITH OTHER ACFT AND REALIZED I WAS ON MSP CENTER. CAREFUL PREPROGRAM WOULD HAVE HELPED PREVENT THIS. ALSO, IF MSP CENTER HAD IDENTIFIED THEMSELVES DURING OUR INITIAL CALLUP, WOULD HAVE HELPED. ALSO, THE USE OF VERY SIMILAR FREQS IN CLOSE PROX WAS A MAJOR FACTOR. FREQS SHOULD BE SPLIT SO DIFFERENT FREQS ARE USED.
Data retrieved from NASA's ASRS site as of August 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.