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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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B767 aircraft under foreign controller cleared to FL150, but flight crew heard clearance as FL050 and read that altitude back. At FL140 controller questioned their altitude and then told them the clearance was to FL150, but then cleared them to FL110.
| Attributes | |
| ACN | 375880 |
| Time | |
| Date | 199707 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : lsaz |
| State Reference | FO |
| Altitude | msl bound lower : 14000 msl bound upper : 15000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B767 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | descent other |
| Route In Use | enroute airway : lsaz |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : flight engineer pilot : instrument pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 5000 flight time type : 500 |
| ASRS Report | 375880 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : flight engineer pilot : atp |
| Experience | flight time last 90 days : 240 flight time total : 18000 flight time type : 5000 |
| ASRS Report | 375728 |
| Events | |
| Anomaly | altitude deviation : overshoot non adherence : clearance other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | other |
Narrative:
ATC cleared our flight to descend to FL050. Captain read back clearance and clearly stated 'cleared to FL050.' at FL140, controller questioned altitude and then mentioned clearance was to FL150. He then cleared us to continue descent to FL110.
Original NASA ASRS Text
Title: B767 ACFT UNDER FOREIGN CTLR CLRED TO FL150, BUT FLC HEARD CLRNC AS FL050 AND READ THAT ALT BACK. AT FL140 CTLR QUESTIONED THEIR ALT AND THEN TOLD THEM THE CLRNC WAS TO FL150, BUT THEN CLRED THEM TO FL110.
Narrative: ATC CLRED OUR FLT TO DSND TO FL050. CAPT READ BACK CLRNC AND CLRLY STATED 'CLRED TO FL050.' AT FL140, CTLR QUESTIONED ALT AND THEN MENTIONED CLRNC WAS TO FL150. HE THEN CLRED US TO CONTINUE DSCNT TO FL110.
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.