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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Flight crew of a commercial fixed wing takes the wrong clearance and leaves their assigned altitude without ATC coordination.
| Attributes | |
| ACN | 419400 |
| Time | |
| Date | 199811 |
| Day | Sun |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : pgs |
| State Reference | AZ |
| Altitude | msl bound lower : 26300 msl bound upper : 28000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Flight Phase | cruise other descent other |
| Route In Use | enroute airway : zab |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : cfi |
| Experience | flight time last 90 days : 175 flight time total : 7500 flight time type : 1600 |
| ASRS Report | 419400 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | other |
| Consequence | Other |
Narrative:
En route cruise from phx-las at FL280. Center was very busy. We received a clearance to 'descend to 12000 ft with a good rate.' I read the clearance back, and we started down. At FL263 center asked about our altitude. I said 'passing through FL263 for 12000 ft.' center replied, with a surprise, that we were assigned FL280. We climbed back up to FL280. When I read the descent clearance back, center never replied. There was no traffic conflict.
Original NASA ASRS Text
Title: FLC OF A COMMERCIAL FIXED WING TAKES THE WRONG CLRNC AND LEAVES THEIR ASSIGNED ALT WITHOUT ATC COORD.
Narrative: ENRTE CRUISE FROM PHX-LAS AT FL280. CTR WAS VERY BUSY. WE RECEIVED A CLRNC TO 'DSND TO 12000 FT WITH A GOOD RATE.' I READ THE CLRNC BACK, AND WE STARTED DOWN. AT FL263 CTR ASKED ABOUT OUR ALT. I SAID 'PASSING THROUGH FL263 FOR 12000 FT.' CTR REPLIED, WITH A SURPRISE, THAT WE WERE ASSIGNED FL280. WE CLBED BACK UP TO FL280. WHEN I READ THE DSCNT CLRNC BACK, CTR NEVER REPLIED. THERE WAS NO TFC CONFLICT.
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.