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An rjcl-65 descended to 11000 ft MSL. After leveloff, center controller disputed original clearance and reclred flight crew to new heading and altitude in dtw area.
| Attributes | |
| ACN | 421280 |
| Time | |
| Date | 199811 |
| Day | Mon |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : dtw |
| State Reference | MI |
| Altitude | msl bound lower : 11000 msl bound upper : 12500 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zob |
| Operator | common carrier : air carrier |
| Make Model Name | Challenger CL604 |
| Navigation In Use | Other |
| Flight Phase | descent other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 250 flight time total : 16000 flight time type : 5000 |
| ASRS Report | 421280 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp pilot : cfi |
| Experience | flight time last 90 days : 20 flight time total : 4000 flight time type : 20 |
| ASRS Report | 421559 |
| Events | |
| Anomaly | altitude deviation : overshoot non adherence : clearance non adherence other other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Ambiguous |
| Air Traffic Incident | Pilot Deviation |
Narrative:
We received a clearance from ZOB to descend to 11000 ft. I put the altitude in the altitude preselect, read back the clearance, and the first officer (PF) verified it and initiated the descent. Shortly thereafter, we were issued a frequency change to the next controller, still ZOB. When I checked on the new frequency I stated, '12500 ft descending to 11000 ft.' the controller acknowledged the call without question. As we leveled at 11000 ft, the controller questioned our altitude and said we were to have leveled at 12000 ft. At that point we were given an off-airway vector and a climb to 13000 ft. To my knowledge, TCASII was displayed on PIC's mfd. There was no loss of separation with traffic in our vicinity. Contributing factors: 1) both center frequencys involved were very busy handling traffic inbound to dtw. 2) the second ZOB controller (last controller prior to handoff to dtw approach) was very busy, and started issuing holding clrncs including our flight) for dtw shortly after he told us we were supposed to be at 12000 ft. Supplemental information from acn 421559: the controller acknowledged our check-in. While leveling at 11000 ft, the controller queried us and said 'you guys are supposed to be at 12000 ft.' contributing factors: the WX was deteriorating. The captain was monitoring TCASII and there were no known conflicts.
Original NASA ASRS Text
Title: AN RJCL-65 DSNDED TO 11000 FT MSL. AFTER LEVELOFF, CTR CTLR DISPUTED ORIGINAL CLRNC AND RECLRED FLC TO NEW HDG AND ALT IN DTW AREA.
Narrative: WE RECEIVED A CLRNC FROM ZOB TO DSND TO 11000 FT. I PUT THE ALT IN THE ALT PRESELECT, READ BACK THE CLRNC, AND THE FO (PF) VERIFIED IT AND INITIATED THE DSCNT. SHORTLY THEREAFTER, WE WERE ISSUED A FREQ CHANGE TO THE NEXT CTLR, STILL ZOB. WHEN I CHKED ON THE NEW FREQ I STATED, '12500 FT DSNDING TO 11000 FT.' THE CTLR ACKNOWLEDGED THE CALL WITHOUT QUESTION. AS WE LEVELED AT 11000 FT, THE CTLR QUESTIONED OUR ALT AND SAID WE WERE TO HAVE LEVELED AT 12000 FT. AT THAT POINT WE WERE GIVEN AN OFF-AIRWAY VECTOR AND A CLB TO 13000 FT. TO MY KNOWLEDGE, TCASII WAS DISPLAYED ON PIC'S MFD. THERE WAS NO LOSS OF SEPARATION WITH TFC IN OUR VICINITY. CONTRIBUTING FACTORS: 1) BOTH CTR FREQS INVOLVED WERE VERY BUSY HANDLING TFC INBOUND TO DTW. 2) THE SECOND ZOB CTLR (LAST CTLR PRIOR TO HDOF TO DTW APCH) WAS VERY BUSY, AND STARTED ISSUING HOLDING CLRNCS INCLUDING OUR FLT) FOR DTW SHORTLY AFTER HE TOLD US WE WERE SUPPOSED TO BE AT 12000 FT. SUPPLEMENTAL INFO FROM ACN 421559: THE CTLR ACKNOWLEDGED OUR CHK-IN. WHILE LEVELING AT 11000 FT, THE CTLR QUERIED US AND SAID 'YOU GUYS ARE SUPPOSED TO BE AT 12000 FT.' CONTRIBUTING FACTORS: THE WX WAS DETERIORATING. THE CAPT WAS MONITORING TCASII AND THERE WERE NO KNOWN CONFLICTS.
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.