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Flight crew of a B737 misunderstood the clearance heading given by ATCT controller prior to takeoff and turned to the wrong heading during initial climb resulting in the departure controller intervention and correcting the mistake.
| Attributes | |
| ACN | 500590 |
| Time | |
| Date | 200102 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : slc.airport |
| State Reference | UT |
| Altitude | msl single value : 7000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : s56.tracon tower : slc.tower |
| Make Model Name | B737-300 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : initial |
| Route In Use | departure : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : flight engineer pilot : commercial pilot : instrument |
| Experience | flight time last 90 days : 150 flight time total : 15000 flight time type : 12000 |
| ASRS Report | 500590 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : multi engine pilot : commercial |
| Events | |
| Anomaly | non adherence : clearance other spatial deviation |
| Independent Detector | atc equipment other atc equipment : radar other controllera |
| Resolutory Action | controller : issued alert flight crew : returned to original clearance |
| Consequence | faa : reviewed incident with flight crew |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance ATC Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Departed slc runway 34R. On departure, we were given a heading and frequency switch. The heading we heard and read back was 040 degrees. Because this easterly heading took us towards mountainous terrain, we both thought it a bit odd. However, since it was VMC, we could see the mountains, and we had an excellent climb rate we thought it looked ok. After checking in with departure, he gave us a heading of 340 degrees and queried our reason for our current heading. We were given a phone number to call at our next stop. Upon talking to the supervisor, they had reviewed the tapes and the controller had given us a 340 degree heading. We read back a 040 degree heading and the incorrect readback wasn't corrected. The supervisor also indicated that their radios didn't sound as good as they should have. Increased vigilance, question odd clrncs, and a remote radio for recording ATC/pilot xmissions would have all helped to prevent and better understand these type of incidents.
Original NASA ASRS Text
Title: FLC OF A B737 MISUNDERSTOOD THE CLRNC HDG GIVEN BY ATCT CTLR PRIOR TO TKOF AND TURNED TO THE WRONG HDG DURING INITIAL CLB RESULTING IN THE DEP CTLR INTERVENTION AND CORRECTING THE MISTAKE.
Narrative: DEPARTED SLC RWY 34R. ON DEP, WE WERE GIVEN A HDG AND FREQ SWITCH. THE HDG WE HEARD AND READ BACK WAS 040 DEGS. BECAUSE THIS EASTERLY HDG TOOK US TOWARDS MOUNTAINOUS TERRAIN, WE BOTH THOUGHT IT A BIT ODD. HOWEVER, SINCE IT WAS VMC, WE COULD SEE THE MOUNTAINS, AND WE HAD AN EXCELLENT CLB RATE WE THOUGHT IT LOOKED OK. AFTER CHKING IN WITH DEP, HE GAVE US A HDG OF 340 DEGS AND QUERIED OUR REASON FOR OUR CURRENT HDG. WE WERE GIVEN A PHONE NUMBER TO CALL AT OUR NEXT STOP. UPON TALKING TO THE SUPVR, THEY HAD REVIEWED THE TAPES AND THE CTLR HAD GIVEN US A 340 DEG HDG. WE READ BACK A 040 DEG HDG AND THE INCORRECT READBACK WASN'T CORRECTED. THE SUPVR ALSO INDICATED THAT THEIR RADIOS DIDN'T SOUND AS GOOD AS THEY SHOULD HAVE. INCREASED VIGILANCE, QUESTION ODD CLRNCS, AND A REMOTE RADIO FOR RECORDING ATC/PLT XMISSIONS WOULD HAVE ALL HELPED TO PREVENT AND BETTER UNDERSTAND THESE TYPE OF INCIDENTS.
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.