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An air carrier flight crew is asked by ZID to confirm that they were assigned FL290 not FL270 and they do so. Later, after a traffic separation maneuver, ZID confirms that ZOB had erroneously assigned FL290.
| Attributes | |
| ACN | 333443 |
| Time | |
| Date | 199604 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : rod |
| State Reference | OH |
| Altitude | msl bound lower : 27000 msl bound upper : 29000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zid artcc : zob |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude cruise other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : cfi pilot : instrument pilot : commercial pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 18000 flight time type : 200 |
| ASRS Report | 333443 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | inflight encounter other other anomaly other |
| Independent Detector | atc equipment other atc equipment : unspecified other controllera |
| Resolutory Action | controller : issued new clearance other other |
| Consequence | faa : reviewed incident with flight crew |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | other |
Narrative:
ZOB assigned us FL290 then switched us to ZID ATC. We checked in with ZID as climbing to FL290. At approximately 28500 ft, controller asked us to confirm FL290 and not FL270. We verified FL290. Controller asked us to turn right 15 degrees. ZID switched us to another frequency and responded that we had been cleared to FL290. From radio transmission we believe ZOB incorrectly assigned us FL290, causing a traffic conflict with ZID traffic at FL290. ZOB frequency was 119.95, ZID frequencys were 126.97/125.07. TCASII showed traffic co-altitude 5-6 mi at 10 O'clock position, no RA received.
Original NASA ASRS Text
Title: AN ACR FLC IS ASKED BY ZID TO CONFIRM THAT THEY WERE ASSIGNED FL290 NOT FL270 AND THEY DO SO. LATER, AFTER A TFC SEPARATION MANEUVER, ZID CONFIRMS THAT ZOB HAD ERRONEOUSLY ASSIGNED FL290.
Narrative: ZOB ASSIGNED US FL290 THEN SWITCHED US TO ZID ATC. WE CHKED IN WITH ZID AS CLBING TO FL290. AT APPROX 28500 FT, CTLR ASKED US TO CONFIRM FL290 AND NOT FL270. WE VERIFIED FL290. CTLR ASKED US TO TURN R 15 DEGS. ZID SWITCHED US TO ANOTHER FREQ AND RESPONDED THAT WE HAD BEEN CLRED TO FL290. FROM RADIO XMISSION WE BELIEVE ZOB INCORRECTLY ASSIGNED US FL290, CAUSING A TFC CONFLICT WITH ZID TFC AT FL290. ZOB FREQ WAS 119.95, ZID FREQS WERE 126.97/125.07. TCASII SHOWED TFC CO-ALT 5-6 MI AT 10 O'CLOCK POS, NO RA RECEIVED.
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.