Altitude deviation altitude overshot in descent.

Attributes
ACN	302520
Time
Date	199504
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : huo
State Reference	NY
Altitude	msl bound lower : 6500 msl bound upper : 7000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : n90
Operator	common carrier : air carrier
Make Model Name	ATR 42
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	descent other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : cfi pilot : atp
Experience	flight time last 90 days : 220 flight time total : 4300 flight time type : 700
ASRS Report	302520
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 240 flight time total : 9000 flight time type : 2000
ASRS Report	302408
Events
Anomaly	aircraft equipment problem : less severe altitude deviation : overshoot non adherence : clearance
Independent Detector	other controllera other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course flight crew : overcame equipment problem other
Consequence	faa : reviewed incident with flight crew
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	Pilot Deviation

Narrative:

While in cruise at FL190 received ATC instruction to descend and maintain 7000 ft, 10 mi north of huo VOR. At the time we were 25-30 mi from VOR and the autoplt was engaged. Initiated autoplt descent at 3000 FPM to meet crossing restr. Autoplt failed to capture selected altitude and during recovery the aircraft descended approximately 500 ft below assigned altitude. Upon receipt of next frequency the controller indicated that there was not a problem.

Original NASA ASRS Text

Title: ALTDEV ALT OVERSHOT IN DSCNT.

Narrative: WHILE IN CRUISE AT FL190 RECEIVED ATC INSTRUCTION TO DSND AND MAINTAIN 7000 FT, 10 MI N OF HUO VOR. AT THE TIME WE WERE 25-30 MI FROM VOR AND THE AUTOPLT WAS ENGAGED. INITIATED AUTOPLT DSCNT AT 3000 FPM TO MEET XING RESTR. AUTOPLT FAILED TO CAPTURE SELECTED ALT AND DURING RECOVERY THE ACFT DSNDED APPROX 500 FT BELOW ASSIGNED ALT. UPON RECEIPT OF NEXT FREQ THE CTLR INDICATED THAT THERE WAS NOT A PROB.

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.