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An medium large transport flight crew receives a clearance from 16000 ft to 12000 ft from ZNY and when checking in with ZOB they are questioned as to the authenticity of that clearance.
| Attributes | |
| ACN | 418810 |
| Time | |
| Date | 199811 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : roc |
| State Reference | NY |
| Altitude | msl bound lower : 14500 msl bound upper : 16000 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zob artcc : zny |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| 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 : atp |
| Experience | flight time last 90 days : 180 flight time total : 15000 flight time type : 7000 |
| ASRS Report | 418810 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : flight engineer pilot : cfi pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 18000 flight time type : 4500 |
| ASRS Report | 418586 |
| Events | |
| Anomaly | altitude deviation : overshoot non adherence : published procedure other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance |
| Consequence | Other |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | other |
Narrative:
Prior to handoff to ZOB, both the captain and I thought ZNY had cleared us from 16000 ft to 12000 ft. When we checked on with ZOB, we were going through 14500 ft. ZOB at first said he thought our assigned altitude was 16000 ft. We told him we had been assigned 12000 ft from ZNY. A few seconds later he said for us to descend to 12000 ft and that there as no problem. Without hearing the tapes we don't know if it was a 'hearback' error in the cockpit or a communication discrepancy between the 2 ctrs. Supplemental information from acn 418586: ZNY cleared our flight to 12000 ft on frequency 133.35. Both pilots heard the clearance and agreed on the MCP input.
Original NASA ASRS Text
Title: AN MLG FLC RECEIVES A CLRNC FROM 16000 FT TO 12000 FT FROM ZNY AND WHEN CHKING IN WITH ZOB THEY ARE QUESTIONED AS TO THE AUTHENTICITY OF THAT CLRNC.
Narrative: PRIOR TO HDOF TO ZOB, BOTH THE CAPT AND I THOUGHT ZNY HAD CLRED US FROM 16000 FT TO 12000 FT. WHEN WE CHKED ON WITH ZOB, WE WERE GOING THROUGH 14500 FT. ZOB AT FIRST SAID HE THOUGHT OUR ASSIGNED ALT WAS 16000 FT. WE TOLD HIM WE HAD BEEN ASSIGNED 12000 FT FROM ZNY. A FEW SECONDS LATER HE SAID FOR US TO DSND TO 12000 FT AND THAT THERE AS NO PROB. WITHOUT HEARING THE TAPES WE DON'T KNOW IF IT WAS A 'HEARBACK' ERROR IN THE COCKPIT OR A COM DISCREPANCY BTWN THE 2 CTRS. SUPPLEMENTAL INFO FROM ACN 418586: ZNY CLRED OUR FLT TO 12000 FT ON FREQ 133.35. BOTH PLTS HEARD THE CLRNC AND AGREED ON THE MCP INPUT.
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.