Cpr jet overshot assigned descent altitude due to not taking over manually from the autoplt which could not level aircraft from such a high rate of descent requested by ATC.

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Attributes
ACN	503120
Time
Date	200102
Day	Wed
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : zny.artcc
State Reference	NY
Altitude	msl bound lower : 32300 msl bound upper : 33000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zny.artcc
Operator	general aviation : corporate
Make Model Name	Falcon 50
Operating Under FAR Part	Part 91
Navigation In Use	other
Flight Phase	descent : vacating altitude
Flight Plan	IFR
Person 1
Affiliation	company : corporate
Function	flight crew : captain oversight : pic
Qualification	pilot : multi engine pilot : atp
Experience	flight time last 90 days : 109 flight time total : 16500 flight time type : 907
ASRS Report	503120
Person 2
Affiliation	company : corporate
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument pilot : multi engine
Experience	flight time last 90 days : 103 flight time total : 2896 flight time type : 255
ASRS Report	503121
Events
Anomaly	altitude deviation : overshoot non adherence : clearance
Independent Detector	atc equipment other atc equipment : radar other flight crewa other flight crewb
Resolutory Action	flight crew : returned to assigned altitude
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

We were cleared to descend from FL390 to FL330 by ZNY. Going through approximately FL350, center asked us to increase our rate of descent. We were doing about 2000 FPM and increased to approximately 3500 FPM. The altitude select was armed, however, as we neared FL330 at this increased rate of descent, the autoplt had a hard time engaging. By the time we realized that the aircraft wasn't going to level off and turned the autoplt off, we had descended to approximately FL323. We were just leveling off back at FL330 when the controller asked what our altitude was. We said we were level at FL330 and then he cleared us to FL290.

Original NASA ASRS Text

Title: CPR JET OVERSHOT ASSIGNED DSCNT ALT DUE TO NOT TAKING OVER MANUALLY FROM THE AUTOPLT WHICH COULD NOT LEVEL ACFT FROM SUCH A HIGH RATE OF DSCNT REQUESTED BY ATC.

Narrative: WE WERE CLRED TO DSND FROM FL390 TO FL330 BY ZNY. GOING THROUGH APPROX FL350, CTR ASKED US TO INCREASE OUR RATE OF DSCNT. WE WERE DOING ABOUT 2000 FPM AND INCREASED TO APPROX 3500 FPM. THE ALT SELECT WAS ARMED, HOWEVER, AS WE NEARED FL330 AT THIS INCREASED RATE OF DSCNT, THE AUTOPLT HAD A HARD TIME ENGAGING. BY THE TIME WE REALIZED THAT THE ACFT WASN'T GOING TO LEVEL OFF AND TURNED THE AUTOPLT OFF, WE HAD DSNDED TO APPROX FL323. WE WERE JUST LEVELING OFF BACK AT FL330 WHEN THE CTLR ASKED WHAT OUR ALT WAS. WE SAID WE WERE LEVEL AT FL330 AND THEN HE CLRED US TO FL290.

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.