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Corporate DA20 flight crew confusion regarding clearance interpretation exacerbated by ARTCC radar controller technique communication when he gives them the wrong NAVAID for altitude crossing restr.
| Attributes | |
| ACN | 345460 |
| Time | |
| Date | 199608 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : sie |
| State Reference | NJ |
| Altitude | msl bound lower : 21000 msl bound upper : 22500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdc |
| Operator | general aviation : corporate |
| Make Model Name | Falcon 20FJF/20C/20D/20E/20F |
| Operating Under FAR Part | Part 91 |
| Navigation In Use | Other Other |
| Flight Phase | descent other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 100 flight time total : 13500 flight time type : 500 |
| ASRS Report | 345460 |
| Person 2 | |
| Affiliation | Other |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | altitude deviation : undershoot altitude deviation : crossing restriction not met non adherence : clearance other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : became reoriented none taken : unable |
| Consequence | Other |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Pilot Deviation Operational Deviation |
Narrative:
Clearance was to cross 50 mi north of swl, we were not navigating off of swl but tuned it in anyway to see if possibly it was used to identify the restr. We were 90 mi from it, moving away from it. Called center back to clarify the clearance. Again he gave us the same clearance. We told him we were not navigating off of swl, did he mean sie VOR which we were navigating off of? He said yes isn't that what I said? We told him no and read back the clearance he gave us to him for the third time. Consequently we missed the restr by 1500 ft and 20 seconds past the point. A contributing factor was also trying to use the VNAV function of the new FMS, just installed. I believe that this distracted us just enough along with the wrong clearance to put us behind on the descent.
Original NASA ASRS Text
Title: CORPORATE DA20 FLC CONFUSION REGARDING CLRNC INTERP EXACERBATED BY ARTCC RADAR CTLR TECHNIQUE COM WHEN HE GIVES THEM THE WRONG NAVAID FOR ALT XING RESTR.
Narrative: CLRNC WAS TO CROSS 50 MI N OF SWL, WE WERE NOT NAVING OFF OF SWL BUT TUNED IT IN ANYWAY TO SEE IF POSSIBLY IT WAS USED TO IDENT THE RESTR. WE WERE 90 MI FROM IT, MOVING AWAY FROM IT. CALLED CTR BACK TO CLARIFY THE CLRNC. AGAIN HE GAVE US THE SAME CLRNC. WE TOLD HIM WE WERE NOT NAVING OFF OF SWL, DID HE MEAN SIE VOR WHICH WE WERE NAVING OFF OF? HE SAID YES ISN'T THAT WHAT I SAID? WE TOLD HIM NO AND READ BACK THE CLRNC HE GAVE US TO HIM FOR THE THIRD TIME. CONSEQUENTLY WE MISSED THE RESTR BY 1500 FT AND 20 SECONDS PAST THE POINT. A CONTRIBUTING FACTOR WAS ALSO TRYING TO USE THE VNAV FUNCTION OF THE NEW FMS, JUST INSTALLED. I BELIEVE THAT THIS DISTRACTED US JUST ENOUGH ALONG WITH THE WRONG CLRNC TO PUT US BEHIND ON THE DSCNT.
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.