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An air carrier large transport flight crew descends to FL270 and later is told that they were only cleared to FL280. No conflict.
| Attributes | |
| ACN | 346990 |
| Time | |
| Date | 199609 |
| Day | Mon |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : mtu |
| State Reference | UT |
| Altitude | msl bound lower : 27000 msl bound upper : 28000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zlc |
| Operator | common carrier : air carrier |
| Make Model Name | B757 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | descent other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : flight engineer pilot : cfi pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 11000 |
| ASRS Report | 346990 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : instrument pilot : flight engineer pilot : atp pilot : commercial |
| Experience | flight time last 90 days : 150 flight time total : 17600 |
| ASRS Report | 347236 |
| Events | |
| Anomaly | altitude deviation : overshoot non adherence : far non adherence : clearance |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance other other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Cruising at FL350, cleared to descend to FL270. Captain set altitude in window and began descent. At FL270 center asked our altitude and said he had cleared us to FL280, but to now maintain FL270. We asked if we had a problem or conflict and he said no problem.
Original NASA ASRS Text
Title: AN ACR LGT FLC DSNDS TO FL270 AND LATER IS TOLD THAT THEY WERE ONLY CLRED TO FL280. NO CONFLICT.
Narrative: CRUISING AT FL350, CLRED TO DSND TO FL270. CAPT SET ALT IN WINDOW AND BEGAN DSCNT. AT FL270 CTR ASKED OUR ALT AND SAID HE HAD CLRED US TO FL280, BUT TO NOW MAINTAIN FL270. WE ASKED IF WE HAD A PROB OR CONFLICT AND HE SAID NO PROB.
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.