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B737-300. ZOB radar controller questioned the flight crew's descent from FL280. The flight crew thought they had been cleared to FL250. They gave the appropriate readback.
| Attributes | |
| ACN | 599086 |
| Time | |
| Date | 200311 |
| Day | Thu |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : cle.airport |
| State Reference | OH |
| Altitude | msl bound lower : 27600 msl bound upper : 28000 |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zob.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B737-300 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : enroute altitude change cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 599086 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude non adherence : far non adherence : published procedure other anomaly other anomaly other |
| Independent Detector | atc equipment other atc equipment : radar other controllera |
| Resolutory Action | controller : issued alert controller : issued new clearance |
| Consequence | faa : reviewed incident with flight crew other |
| Supplementary | |
| Problem Areas | ATC Human Performance Flight Crew Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | other |
Narrative:
Cleared from FL280 to FL250 at FL276. ATC asked us 'are you at FL280.' I said, 'no, we were cleared to FL250.' ATC said 'I told you to slow to two five zero, but now cleared to FL270.' no TCASII. Frequency was very, very, busy. Very difficult to hear what he said and 3 of us in cockpit thought he said to descend. I reported out of FL280. I don't know the answer if ATC will not respond to what 3 of us thought we heard.
Original NASA ASRS Text
Title: B737-300. ZOB RADAR CTLR QUESTIONED THE FLT CREW'S DSCNT FROM FL280. THE FLT CREW THOUGHT THEY HAD BEEN CLRED TO FL250. THEY GAVE THE APPROPRIATE READBACK.
Narrative: CLRED FROM FL280 TO FL250 AT FL276. ATC ASKED US 'ARE YOU AT FL280.' I SAID, 'NO, WE WERE CLRED TO FL250.' ATC SAID 'I TOLD YOU TO SLOW TO TWO FIVE ZERO, BUT NOW CLRED TO FL270.' NO TCASII. FREQ WAS VERY, VERY, BUSY. VERY DIFFICULT TO HEAR WHAT HE SAID AND 3 OF US IN COCKPIT THOUGHT HE SAID TO DSND. I RPTED OUT OF FL280. I DON'T KNOW THE ANSWER IF ATC WILL NOT RESPOND TO WHAT 3 OF US THOUGHT WE HEARD.
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.