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Flight crew of a cpr cessna citation III C650 overshot altitude during climb due clearance interpretation. Captain read back high altitude with no ATC contradiction. However, ARTCC radar controller stopped their climb early and sent them back down. Crew thought that they heard it correctly and set the altitude alerter accordingly.
| Attributes | |
| ACN | 410898 |
| Time | |
| Date | 199808 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : vuz airport : bhm |
| State Reference | AL |
| Altitude | msl bound lower : 18000 msl bound upper : 19600 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : ztl |
| Operator | general aviation : corporate |
| Make Model Name | Citation III, VI, VII |
| Operating Under FAR Part | Part 91 |
| Navigation In Use | Other |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute airway : ztl |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 62 flight time total : 6835 flight time type : 440 |
| ASRS Report | 410898 |
| Person 2 | |
| Affiliation | Other |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Experience | flight time last 90 days : 70 flight time total : 2500 flight time type : 400 |
| ASRS Report | 411400 |
| Events | |
| Anomaly | altitude deviation : overshoot other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | flight crew : returned to intended course or assigned course other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
During climb out we were cleared by ZTL (frequency 127.3) from approximately 11000 ft to FL210. At approximately 15000-16000 ft, ZTL cleared us to FL280. As we climbed through FL195, ATC asked if we were level at FL180. I stated we were cleared to FL280 and ATC said to descend immediately to FL180. I feel ATC meant to give us FL180 but read FL280. I read back FL280 and set FL280 in the altitude alerter.
Original NASA ASRS Text
Title: FLC OF A CPR CESSNA CITATION III C650 OVERSHOT ALT DURING CLB DUE CLRNC INTERP. CAPT READ BACK HIGH ALT WITH NO ATC CONTRADICTION. HOWEVER, ARTCC RADAR CTLR STOPPED THEIR CLB EARLY AND SENT THEM BACK DOWN. CREW THOUGHT THAT THEY HEARD IT CORRECTLY AND SET THE ALT ALERTER ACCORDINGLY.
Narrative: DURING CLBOUT WE WERE CLRED BY ZTL (FREQ 127.3) FROM APPROX 11000 FT TO FL210. AT APPROX 15000-16000 FT, ZTL CLRED US TO FL280. AS WE CLBED THROUGH FL195, ATC ASKED IF WE WERE LEVEL AT FL180. I STATED WE WERE CLRED TO FL280 AND ATC SAID TO DSND IMMEDIATELY TO FL180. I FEEL ATC MEANT TO GIVE US FL180 BUT READ FL280. I READ BACK FL280 AND SET FL280 IN THE ALT ALERTER.
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.