BE40 crew lost altitude in a controller directed turn.

Attributes
ACN	517808
Time
Date	200107
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : oxc.airport
State Reference	CT
Altitude	msl bound lower : 2000 msl bound upper : 2800
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : n90.tracon
Operator	general aviation : corporate
Make Model Name	Beechjet 400
Operating Under FAR Part	Part 91
Flight Phase	climbout : intermediate altitude
Route In Use	departure : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : cfi pilot : atp
Experience	flight time last 90 days : 60 flight time total : 3100 flight time type : 800
ASRS Report	517808
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	altitude deviation : excursion from assigned altitude non adherence : far non adherence : published procedure other anomaly other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : regained aircraft control flight crew : returned to assigned altitude other
Consequence	faa : assigned or threatened penalties
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Took off from oxc. The clearance was to turn left to 180 degrees. We took off runway 36. On climb out while turning to 180 degrees, the copilot who was flying heard the center controller tell us to keep the turn in close. So he tightened the turn and started to lose altitude. I called altitude and he said 'I know.' then he pulled back and increased the rate of descent even more. I then put my hands on the controls as I told him to roll out of the turn. He rolled out of the turn and started to climb again. We were cleared to 3000 ft. We started our descent at 2800 ft. We rolled out of the turn and started to climb again about 2100 ft -- all before we were in radar contact.

Original NASA ASRS Text

Title: BE40 CREW LOST ALT IN A CTLR DIRECTED TURN.

Narrative: TOOK OFF FROM OXC. THE CLRNC WAS TO TURN L TO 180 DEGS. WE TOOK OFF RWY 36. ON CLBOUT WHILE TURNING TO 180 DEGS, THE COPLT WHO WAS FLYING HEARD THE CTR CTLR TELL US TO KEEP THE TURN IN CLOSE. SO HE TIGHTENED THE TURN AND STARTED TO LOSE ALT. I CALLED ALT AND HE SAID 'I KNOW.' THEN HE PULLED BACK AND INCREASED THE RATE OF DSCNT EVEN MORE. I THEN PUT MY HANDS ON THE CTLS AS I TOLD HIM TO ROLL OUT OF THE TURN. HE ROLLED OUT OF THE TURN AND STARTED TO CLB AGAIN. WE WERE CLRED TO 3000 FT. WE STARTED OUR DSCNT AT 2800 FT. WE ROLLED OUT OF THE TURN AND STARTED TO CLB AGAIN ABOUT 2100 FT -- ALL BEFORE WE WERE IN RADAR CONTACT.

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.