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Air carrier flight crew assigned 15000'. Readback acknowledged. Passing 13800', controller said should have leveled at 13000'.
| Attributes | |
| ACN | 131633 |
| Time | |
| Date | 198912 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : ord |
| State Reference | IL |
| Altitude | msl bound lower : 13000 msl bound upper : 13800 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zau tower : bna |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : flight engineer pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 5800 flight time type : 250 |
| ASRS Report | 131633 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 12000 flight time type : 2000 |
| ASRS Report | 131578 |
| Events | |
| Anomaly | altitude deviation : overshoot 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:
Ord departure control cleared aircraft to 15000', 230 KTS. Captain read back clearance as such. Controller acknowledged. When climbing past 13800', controller called back and told us we should have leveled at 13000', which we did. No conflict occurred. Our flight # was cai, and theirs was hai on same frequency. Both sound alike when spoken over radio. I think controller thought hai read back clearance instead of cai.
Original NASA ASRS Text
Title: ACR FLT CREW ASSIGNED 15000'. READBACK ACKNOWLEDGED. PASSING 13800', CTLR SAID SHOULD HAVE LEVELED AT 13000'.
Narrative: ORD DEP CTL CLRED ACFT TO 15000', 230 KTS. CAPT READ BACK CLRNC AS SUCH. CTLR ACKNOWLEDGED. WHEN CLBING PAST 13800', CTLR CALLED BACK AND TOLD US WE SHOULD HAVE LEVELED AT 13000', WHICH WE DID. NO CONFLICT OCCURRED. OUR FLT # WAS CAI, AND THEIRS WAS HAI ON SAME FREQ. BOTH SOUND ALIKE WHEN SPOKEN OVER RADIO. I THINK CTLR THOUGHT HAI READ BACK CLRNC INSTEAD OF CAI.
Data retrieved from NASA's ASRS site as of August 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.