Narrative:

We were given a clearance to land toward ilm airport with the clearance to deviate as needed around WX. Radar showed echoes of medium intensity along our intended flight path, so we steered toward the areas that seemed to be the lightest in intensity. The captain was flying from the left seat as we entered the clouds and began to encounter moderate to occasional severe turbulence. He then said 'we have to get out of here' and began a 45 degree banking turn to the left. In the turn he lost approximately 600 ft. We then broke out of the WX and advised the controller that we wanted to change our destination to wv. We then centered the clouds again and were cleared to 8000 ft. The captain then began to demonstrate poor altitude control as light to moderate turbulence began. I called out his deviations and asked him what he was doing. The controller also called and asked what altitude we intended to maintain as well. The controller became excited as he had to give rapid instructions to another aircraft due to a possible loss of separation. I was assertive in my reponse to the captain's unsatisfactory aircraft control. I directed him several times to 'get on his altitude.' I feel the captain was not very current and was somewhat rattled by the previous turbulence. If the captain continued his altdevs, I was was going to take control of the aircraft and talk about it later on the ground.

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Original NASA ASRS Text

Title: CAPT OF A LEAR JET 35 DEVIATED FROM ASSIGNED ALT AND TRACK AFTER ENCOUNTERING TSTMS CAUSING APPREHENSION BY THE RPTING FO AND ATC INTERVENTION TO MOVE OTHER TFC IN CASE THE DEVS CONTINUED.

Narrative: WE WERE GIVEN A CLRNC TO LAND TOWARD ILM ARPT WITH THE CLRNC TO DEVIATE AS NEEDED AROUND WX. RADAR SHOWED ECHOES OF MEDIUM INTENSITY ALONG OUR INTENDED FLT PATH, SO WE STEERED TOWARD THE AREAS THAT SEEMED TO BE THE LIGHTEST IN INTENSITY. THE CAPT WAS FLYING FROM THE L SEAT AS WE ENTERED THE CLOUDS AND BEGAN TO ENCOUNTER MODERATE TO OCCASIONAL SEVERE TURB. HE THEN SAID 'WE HAVE TO GET OUT OF HERE' AND BEGAN A 45 DEG BANKING TURN TO THE L. IN THE TURN HE LOST APPROX 600 FT. WE THEN BROKE OUT OF THE WX AND ADVISED THE CTLR THAT WE WANTED TO CHANGE OUR DEST TO WV. WE THEN CTRED THE CLOUDS AGAIN AND WERE CLRED TO 8000 FT. THE CAPT THEN BEGAN TO DEMONSTRATE POOR ALT CTL AS LIGHT TO MODERATE TURB BEGAN. I CALLED OUT HIS DEVS AND ASKED HIM WHAT HE WAS DOING. THE CTLR ALSO CALLED AND ASKED WHAT ALT WE INTENDED TO MAINTAIN AS WELL. THE CTLR BECAME EXCITED AS HE HAD TO GIVE RAPID INSTRUCTIONS TO ANOTHER ACFT DUE TO A POSSIBLE LOSS OF SEPARATION. I WAS ASSERTIVE IN MY REPONSE TO THE CAPT'S UNSATISFACTORY ACFT CTL. I DIRECTED HIM SEVERAL TIMES TO 'GET ON HIS ALT.' I FEEL THE CAPT WAS NOT VERY CURRENT AND WAS SOMEWHAT RATTLED BY THE PREVIOUS TURB. IF THE CAPT CONTINUED HIS ALTDEVS, I WAS WAS GOING TO TAKE CTL OF THE ACFT AND TALK ABOUT IT LATER ON THE GND.

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.