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Medium large transport crew was issued an inappropriate altitude clearance restr that they were unable to comply with.
| Attributes | |
| ACN | 475670 |
| Time | |
| Date | 200006 |
| Day | Tue |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : cle.airport |
| State Reference | OH |
| Altitude | msl bound lower : 15700 msl bound upper : 16500 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zob.artcc |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | climbout : vacating altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : multi engine pilot : cfi pilot : flight engineer pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 10000 flight time type : 250 |
| ASRS Report | 475670 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : multi engine pilot : instrument pilot : commercial |
| Events | |
| Anomaly | altitude deviation : overshoot other anomaly other |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | flight crew : returned to assigned altitude |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
Narrative:
After departure from cle, during climb out and after handoff to ZOB, our flight was cleared to FL230. Passing 15700 ft, the controller hurriedly reclred our flight to maintain 16000 ft. At that time the aircraft was climbing in excess of 4000 FPM. The aircraft was leveled off as fast as safely possible and then returned to 16000 ft. During leveloff, the aircraft reached approximately 16500 ft. Due to frequency congestion the controller was not notified immediately. The flight was subsequently cleared to FL180 and higher. At the time the center controller appeared to be very busy and the frequency was very congested. TCASII showed numerous aircraft in our vicinity. This situation could have been prevented if the controller had not been so busy. Under the circumstances (climb rate of +4000 FPM) the aircraft could not be safely leveled off with just 300 ft of notice.
Original NASA ASRS Text
Title: MLG CREW WAS ISSUED AN INAPPROPRIATE ALT CLRNC RESTR THAT THEY WERE UNABLE TO COMPLY WITH.
Narrative: AFTER DEP FROM CLE, DURING CLBOUT AND AFTER HDOF TO ZOB, OUR FLT WAS CLRED TO FL230. PASSING 15700 FT, THE CTLR HURRIEDLY RECLRED OUR FLT TO MAINTAIN 16000 FT. AT THAT TIME THE ACFT WAS CLBING IN EXCESS OF 4000 FPM. THE ACFT WAS LEVELED OFF AS FAST AS SAFELY POSSIBLE AND THEN RETURNED TO 16000 FT. DURING LEVELOFF, THE ACFT REACHED APPROX 16500 FT. DUE TO FREQ CONGESTION THE CTLR WAS NOT NOTIFIED IMMEDIATELY. THE FLT WAS SUBSEQUENTLY CLRED TO FL180 AND HIGHER. AT THE TIME THE CTR CTLR APPEARED TO BE VERY BUSY AND THE FREQ WAS VERY CONGESTED. TCASII SHOWED NUMEROUS ACFT IN OUR VICINITY. THIS SIT COULD HAVE BEEN PREVENTED IF THE CTLR HAD NOT BEEN SO BUSY. UNDER THE CIRCUMSTANCES (CLB RATE OF +4000 FPM) THE ACFT COULD NOT BE SAFELY LEVELED OFF WITH JUST 300 FT OF NOTICE.
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.