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A corporate jet entered the top of a trw and was unable to control altitude; climbing 1400 ft above clearance altitude.
| Attributes | |
| ACN | 663945 |
| Time | |
| Date | 200507 |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | navaid : cvg.vortac |
| State Reference | OH |
| Altitude | msl single value : 13000 |
| Environment | |
| Flight Conditions | IMC |
| Weather Elements | Thunderstorm Turbulence Rain Fog |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zob.artcc |
| Make Model Name | Challenger Jet Undifferentiated or Other Model |
| Operating Under FAR Part | Part 91 |
| Navigation In Use | other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : corporate |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : multi engine pilot : instrument pilot : commercial |
| Experience | controller military : 15 flight time last 90 days : 100 flight time total : 17000 flight time type : 4000 |
| ASRS Report | 663945 |
| Person 2 | |
| Affiliation | company : corporate |
| Function | flight crew : first officer |
| Events | |
| Anomaly | altitude deviation : overshoot inflight encounter : weather inflight encounter : turbulence non adherence : clearance other anomaly maintenance problem : improper maintenance |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | controller : issued new clearance none taken : unable |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Weather |
| Primary Problem | Weather |
Narrative:
Took off from luk. Radar vectors on departure. After handoff from departure to cleveland center; we were cleared to 13000 ft. Then told to maintain 12000 ft. We were being vectored directly at a line of cumulus clouds. We were re-cleared to 13000 ft as we entered the rapidly building cumulus clouds. Turbulence inside the clouds was light with one or two moderate bumps. We experienced a rapid climb with airspeed increasing. I tried to stop the climb with forward yoke pressure and maintain airspeed by reducing power. The rapid climb continued even with a 2 degree or 3 degree nose down attitude. I was finally able to stop the climb at about 14200 ft as we came out the top of the clouds. I started a descent to 13000 ft; but was given a further climb to FL230. No comments were made by center. Callback conversation with reporter revealed the following information: pilot stated that this event did not include turbulence. The crew entered the top of a benign appearing cloud and over a matter of several seconds the speed and rate of climb increased. The entire event was approximately 10 seconds and the aircraft climbed at about 4000 ft per minute. ATC made no comment to them and simply cleared them to a higher altitude. The crew did not report the climb to ATC because of the climb clearance.
Original NASA ASRS Text
Title: A CORPORATE JET ENTERED THE TOP OF A TRW AND WAS UNABLE TO CONTROL ALT; CLBING 1400 FT ABOVE CLRNC ALT.
Narrative: TOOK OFF FROM LUK. RADAR VECTORS ON DEP. AFTER HANDOFF FROM DEP TO CLEVELAND CTR; WE WERE CLRED TO 13000 FT. THEN TOLD TO MAINTAIN 12000 FT. WE WERE BEING VECTORED DIRECTLY AT A LINE OF CUMULUS CLOUDS. WE WERE RE-CLRED TO 13000 FT AS WE ENTERED THE RAPIDLY BUILDING CUMULUS CLOUDS. TURB INSIDE THE CLOUDS WAS LIGHT WITH ONE OR TWO MODERATE BUMPS. WE EXPERIENCED A RAPID CLB WITH AIRSPD INCREASING. I TRIED TO STOP THE CLB WITH FORWARD YOKE PRESSURE AND MAINTAIN AIRSPD BY REDUCING POWER. THE RAPID CLB CONTINUED EVEN WITH A 2 DEG OR 3 DEG NOSE DOWN ATTITUDE. I WAS FINALLY ABLE TO STOP THE CLB AT ABOUT 14200 FT AS WE CAME OUT THE TOP OF THE CLOUDS. I STARTED A DSCNT TO 13000 FT; BUT WAS GIVEN A FURTHER CLB TO FL230. NO COMMENTS WERE MADE BY CTR. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: PLT STATED THAT THIS EVENT DID NOT INCLUDE TURB. THE CREW ENTERED THE TOP OF A BENIGN APPEARING CLOUD AND OVER A MATTER OF SEVERAL SECONDS THE SPD AND RATE OF CLB INCREASED. THE ENTIRE EVENT WAS APPROX 10 SECONDS AND THE ACFT CLBED AT ABOUT 4000 FT PER MINUTE. ATC MADE NO COMMENT TO THEM AND SIMPLY CLRED THEM TO A HIGHER ALT. THE CREW DID NOT RPT THE CLB TO ATC BECAUSE OF THE CLB CLRNC.
Data retrieved from NASA's ASRS site as of January 2009 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.