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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Air carrier phl-yyz maintaining 10000 ft is cleared profile descent runway 6. Captain misread chart and descended to 9000 ft. First officer questioned altitude and flight regained 10000 ft. No conflict.
| Attributes | |
| ACN | 348250 |
| Time | |
| Date | 199609 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : yyz airport : czyz |
| State Reference | ON |
| Altitude | msl bound lower : 9000 msl bound upper : 10000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : czyz |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent other |
| Route In Use | arrival : profile descent |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Experience | flight time last 90 days : 150 flight time total : 12000 |
| ASRS Report | 348250 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude non adherence : clearance non adherence : far non adherence : published procedure |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
On descent into yyz the captain asked if they wanted us on the profile descent for runway 6. They replied not at this time. About 5 mins later ATC came back and said go ahead and join the profile. We were at 10000 ft and the captain dialed in 9000 ft and started down. I questioned the captain on the 9000 ft altitude and he then realized he had looked at the wrong fix arrival and we climbed back to 10000 ft. At no time was there a conflict with other aircraft. I do not think profile dscnts are any good.
Original NASA ASRS Text
Title: ACR PHL-YYZ MAINTAINING 10000 FT IS CLRED PROFILE DSCNT RWY 6. CAPT MISREAD CHART AND DSNDED TO 9000 FT. FO QUESTIONED ALT AND FLT REGAINED 10000 FT. NO CONFLICT.
Narrative: ON DSCNT INTO YYZ THE CAPT ASKED IF THEY WANTED US ON THE PROFILE DSCNT FOR RWY 6. THEY REPLIED NOT AT THIS TIME. ABOUT 5 MINS LATER ATC CAME BACK AND SAID GO AHEAD AND JOIN THE PROFILE. WE WERE AT 10000 FT AND THE CAPT DIALED IN 9000 FT AND STARTED DOWN. I QUESTIONED THE CAPT ON THE 9000 FT ALT AND HE THEN REALIZED HE HAD LOOKED AT THE WRONG FIX ARR AND WE CLBED BACK TO 10000 FT. AT NO TIME WAS THERE A CONFLICT WITH OTHER ACFT. I DO NOT THINK PROFILE DSCNTS ARE ANY GOOD.
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.