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A chartered jet fails to follow the profile descent parameters when cleared to 'cross fix at 10000 ft' near cyyz, on.
| Attributes | |
| ACN | 438400 |
| Time | |
| Date | 199905 |
| Day | Thu |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : cyyz.airport |
| State Reference | ON |
| Altitude | msl single value : 10000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : czyz.artcc |
| Operator | common carrier : charter |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other vortac |
| Flight Phase | descent : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : charter |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 60 flight time total : 6700 flight time type : 4000 |
| ASRS Report | 438400 |
| Person 2 | |
| Affiliation | company : charter |
| Function | flight crew : first officer |
| Qualification | pilot : multi engine pilot : commercial pilot : instrument |
| Events | |
| Anomaly | altitude deviation : overshoot altitude deviation : crossing restriction not met non adherence : clearance non adherence : published procedure other anomaly |
| Independent Detector | atc equipment other atc equipment : radar |
| Resolutory Action | controller : issued advisory none taken : detected after the fact |
| Consequence | faa : reviewed incident with flight crew |
| Supplementary | |
| Problem Areas | Airspace Structure Flight Crew Human Performance ATC Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
| Situations | |
| ATC Facility | procedure or policy : czyz.artcc |
Narrative:
The clearance was very confusing from toronto. The way he issued it was to cross fix at 10000 ft and then the profile descent. When in fact what was meant was cross the last fix on the profile, descend to runway 24 at 10000 ft 'following the profile descent.' center asked us why we deviated from the profile descent and after we explained he said that they just changed the way they issue the clearance and that it is causing a lot of confusion and we were not the first to deviate from what was meant. I feel this should be changed right away.
Original NASA ASRS Text
Title: A CHARTERED JET FAILS TO FOLLOW THE PROFILE DSCNT PARAMETERS WHEN CLRED TO 'CROSS FIX AT 10000 FT' NEAR CYYZ, ON.
Narrative: THE CLRNC WAS VERY CONFUSING FROM TORONTO. THE WAY HE ISSUED IT WAS TO CROSS FIX AT 10000 FT AND THEN THE PROFILE DSCNT. WHEN IN FACT WHAT WAS MEANT WAS CROSS THE LAST FIX ON THE PROFILE, DSND TO RWY 24 AT 10000 FT 'FOLLOWING THE PROFILE DSCNT.' CTR ASKED US WHY WE DEVIATED FROM THE PROFILE DSCNT AND AFTER WE EXPLAINED HE SAID THAT THEY JUST CHANGED THE WAY THEY ISSUE THE CLRNC AND THAT IT IS CAUSING A LOT OF CONFUSION AND WE WERE NOT THE FIRST TO DEVIATE FROM WHAT WAS MEANT. I FEEL THIS SHOULD BE CHANGED RIGHT AWAY.
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.