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Flight crew of corp turboprop interpret controller as having cleared them to FL210, but may have confused it with 12000'. Controller has flight level at 13000' during climb.
| Attributes | |
| ACN | 147852 |
| Time | |
| Date | 199006 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : ftw |
| State Reference | TX |
| Altitude | msl bound lower : 10000 msl bound upper : 13000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zfw |
| Operator | general aviation : corporate |
| Make Model Name | Small Transport, Low Wing, 2 Turboprop Eng |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : cfi pilot : commercial pilot : instrument |
| Experience | flight time last 90 days : 250 flight time total : 14000 flight time type : 3000 |
| ASRS Report | 147852 |
| Person 2 | |
| Affiliation | Other |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | altitude deviation : overshoot non adherence : clearance other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Ambiguous |
| Air Traffic Incident | other |
Narrative:
Both pilot and copilot thought they heard center clear the aircraft from 10000 to 21000'. Copilot responded 'out of 10 for 21000' on the radio, and placed 21000' in the altitude alert. Climbing through 12700', center asked us what altitude we were climbing to. We responded, 'to FL210.' center then asked us to level at 13000', and we did. To our recollection, the controller never said that we should have leveled at 12000', but this is what we were lead to believe. At this time, we do not know if we violated an altitude but we do sense some miscom. To our knowledge, there was no conflict, and th flight continued with no discussion of the incident between the aircraft and controller.
Original NASA ASRS Text
Title: FLT CREW OF CORP TURBOPROP INTERPRET CTLR AS HAVING CLEARED THEM TO FL210, BUT MAY HAVE CONFUSED IT WITH 12000'. CTLR HAS FLT LEVEL AT 13000' DURING CLIMB.
Narrative: BOTH PLT AND COPLT THOUGHT THEY HEARD CENTER CLR THE ACFT FROM 10000 TO 21000'. COPLT RESPONDED 'OUT OF 10 FOR 21000' ON THE RADIO, AND PLACED 21000' IN THE ALT ALERT. CLBING THROUGH 12700', CENTER ASKED US WHAT ALT WE WERE CLBING TO. WE RESPONDED, 'TO FL210.' CENTER THEN ASKED US TO LEVEL AT 13000', AND WE DID. TO OUR RECOLLECTION, THE CTLR NEVER SAID THAT WE SHOULD HAVE LEVELED AT 12000', BUT THIS IS WHAT WE WERE LEAD TO BELIEVE. AT THIS TIME, WE DO NOT KNOW IF WE VIOLATED AN ALT BUT WE DO SENSE SOME MISCOM. TO OUR KNOWLEDGE, THERE WAS NO CONFLICT, AND TH FLT CONTINUED WITH NO DISCUSSION OF THE INCIDENT BTWN THE ACFT AND CTLR.
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.