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An air carrier medium large transport was issued a climb to FL280, however, the captain copied FL310. Passing through FL290, the controller detected the error and issued a descent to FL280. No conflict occurred.
| Attributes | |
| ACN | 412880 |
| Time | |
| Date | 199809 |
| Day | Thu |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : lax |
| State Reference | CA |
| Altitude | msl bound lower : 28000 msl bound upper : 29000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zla |
| Operator | common carrier : air carrier |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 4000 flight time type : 150 |
| ASRS Report | 412880 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| 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 | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation other |
Narrative:
During climb out, I was flying and the captain was working the radios. He answered a call from ZLA for a continued climb to FL310. I must admit I did not hear the call, but I looked at the captain and he said I was cleared to FL310. As we were passing FL290, ZLA said 'you were only cleared to FL280, descend now without delay.' I immediately pushed over and descended without delay. The captain told her (center) that he had read back 'FL310.' all we could figure was that either he just heard them wrong, or he read back a clearance for another aircraft. Either way, we ended up with the wrong clearance and center didn't catch it on the readback. There was an aircraft coming the opposite direction, but center's quick directive radio call and our direction following without questioning her kept us from having a conflict.
Original NASA ASRS Text
Title: AN ACR MLG WAS ISSUED A CLB TO FL280, HOWEVER, THE CAPT COPIED FL310. PASSING THROUGH FL290, THE CTLR DETECTED THE ERROR AND ISSUED A DSCNT TO FL280. NO CONFLICT OCCURRED.
Narrative: DURING CLBOUT, I WAS FLYING AND THE CAPT WAS WORKING THE RADIOS. HE ANSWERED A CALL FROM ZLA FOR A CONTINUED CLB TO FL310. I MUST ADMIT I DID NOT HEAR THE CALL, BUT I LOOKED AT THE CAPT AND HE SAID I WAS CLRED TO FL310. AS WE WERE PASSING FL290, ZLA SAID 'YOU WERE ONLY CLRED TO FL280, DSND NOW WITHOUT DELAY.' I IMMEDIATELY PUSHED OVER AND DSNDED WITHOUT DELAY. THE CAPT TOLD HER (CTR) THAT HE HAD READ BACK 'FL310.' ALL WE COULD FIGURE WAS THAT EITHER HE JUST HEARD THEM WRONG, OR HE READ BACK A CLRNC FOR ANOTHER ACFT. EITHER WAY, WE ENDED UP WITH THE WRONG CLRNC AND CTR DIDN'T CATCH IT ON THE READBACK. THERE WAS AN ACFT COMING THE OPPOSITE DIRECTION, BUT CTR'S QUICK DIRECTIVE RADIO CALL AND OUR DIRECTION FOLLOWING WITHOUT QUESTIONING HER KEPT US FROM HAVING A 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.