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LR36 flight crew loses radio contact shortly after takeoff. Fly inappropriate heading mistaken to have been assigned by tower at takeoff.
| Attributes | |
| ACN | 692835 |
| Time | |
| Date | 200604 |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : tys.tracon |
| State Reference | TN |
| Altitude | msl single value : 5000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Dusk |
| Aircraft 1 | |
| Controlling Facilities | tracon : tys.tracon |
| Operator | common carrier : air taxi |
| Make Model Name | Learjet 36 |
| Operating Under FAR Part | Part 135 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air taxi |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : multi engine pilot : atp |
| Experience | flight time last 90 days : 160 flight time total : 3300 flight time type : 3000 |
| ASRS Report | 692835 |
| Person 2 | |
| Affiliation | company : air taxi |
| Function | flight crew : first officer |
| Events | |
| Anomaly | aircraft equipment problem : critical non adherence : clearance other anomaly other other spatial deviation |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | flight crew : overcame equipment problem |
| Supplementary | |
| Problem Areas | ATC Human Performance Aircraft Flight Crew Human Performance |
| Primary Problem | Ambiguous |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Before departing from morristown; tn; we received our clearance on the ground from knoxville approach. I copied back the clearance as cleared to tri-cities as filed; climb to 5000 ft; frequency 125.5 and squawk abcd. So then we departed and we had trouble contacting departure on the radio. So after reaching 5000 ft I told my copilot I was going to start a turn on course. Our filed course was direct hmv direct tri. So I was going to turn direct hmv. My copilot corrected me and said that we were to fly a 140 degree heading per the clearance. He said that after knoxville approach gave us our squawk he said on departure turn to a 140 degree heading and he showed me that he had written it down. So I turned to a 140 degree heading and tried over the radio to confirm the heading. We were talking to tri-cities approach and the communication was difficult. Normally we would be taking to knoxville departure. So we were somewhat confused by this as well. Before we could get a confirmation from tri-cities on our heading we were told to contact knoxville approach. Once we contacted them we had clear communication and they climbed us up to 6000 ft and turned us on course. They also gave me a phone number to call on the ground. It turned out that after knoxville gave us our clearance they told another aircraft to fly heading 140 degrees and my copilot mistook that to be for us. That 140 degree heading turned us towards mountainous terrain at low altitude. The problem was a misunderstanding of a clearance. The contributing factors were poor crew member communication on the ground about the clearance before takeoff. And poor radio communications in the air when trying to resolve some confusion. The solution is better crew member communication on the ground. And knoxville is questioning whether or not they should make contact with departing aircraft before having them attempt to make contact with a different controling facility.
Original NASA ASRS Text
Title: LR36 FLT CREW LOSES RADIO CONTACT SHORTLY AFTER TKOF. FLY INAPPROPRIATE HDG MISTAKEN TO HAVE BEEN ASSIGNED BY TWR AT TKOF.
Narrative: BEFORE DEPARTING FROM MORRISTOWN; TN; WE RECEIVED OUR CLRNC ON THE GND FROM KNOXVILLE APCH. I COPIED BACK THE CLRNC AS CLRED TO TRI-CITIES AS FILED; CLB TO 5000 FT; FREQ 125.5 AND SQUAWK ABCD. SO THEN WE DEPARTED AND WE HAD TROUBLE CONTACTING DEP ON THE RADIO. SO AFTER REACHING 5000 FT I TOLD MY COPLT I WAS GOING TO START A TURN ON COURSE. OUR FILED COURSE WAS DIRECT HMV DIRECT TRI. SO I WAS GOING TO TURN DIRECT HMV. MY COPLT CORRECTED ME AND SAID THAT WE WERE TO FLY A 140 DEG HDG PER THE CLRNC. HE SAID THAT AFTER KNOXVILLE APCH GAVE US OUR SQUAWK HE SAID ON DEP TURN TO A 140 DEG HDG AND HE SHOWED ME THAT HE HAD WRITTEN IT DOWN. SO I TURNED TO A 140 DEG HDG AND TRIED OVER THE RADIO TO CONFIRM THE HDG. WE WERE TALKING TO TRI-CITIES APCH AND THE COM WAS DIFFICULT. NORMALLY WE WOULD BE TAKING TO KNOXVILLE DEP. SO WE WERE SOMEWHAT CONFUSED BY THIS AS WELL. BEFORE WE COULD GET A CONFIRMATION FROM TRI-CITIES ON OUR HEADING WE WERE TOLD TO CONTACT KNOXVILLE APCH. ONCE WE CONTACTED THEM WE HAD CLR COM AND THEY CLBED US UP TO 6000 FT AND TURNED US ON COURSE. THEY ALSO GAVE ME A PHONE NUMBER TO CALL ON THE GND. IT TURNED OUT THAT AFTER KNOXVILLE GAVE US OUR CLRNC THEY TOLD ANOTHER ACFT TO FLY HDG 140 DEGS AND MY COPLT MISTOOK THAT TO BE FOR US. THAT 140 DEG HDG TURNED US TOWARDS MOUNTAINOUS TERRAIN AT LOW ALT. THE PROB WAS A MISUNDERSTANDING OF A CLRNC. THE CONTRIBUTING FACTORS WERE POOR CREW MEMBER COM ON THE GND ABOUT THE CLRNC BEFORE TKOF. AND POOR RADIO COMS IN THE AIR WHEN TRYING TO RESOLVE SOME CONFUSION. THE SOLUTION IS BETTER CREW MEMBER COM ON THE GND. AND KNOXVILLE IS QUESTIONING WHETHER OR NOT THEY SHOULD MAKE CONTACT WITH DEPARTING ACFT BEFORE HAVING THEM ATTEMPT TO MAKE CONTACT WITH A DIFFERENT CTLING FACILITY.
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.