Air carrier widebody transport altitude deviation overshot during descent. First officer equated 250 KT speed restriction with 10000' and set this altitude into the altitude alert instead of clearance altitude of 11000'.

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Attributes
ACN	107662
Time
Date	198903
Day	Wed
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : pvd
State Reference	RI
Altitude	msl bound lower : 10200 msl bound upper : 11000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tower : day
Operator	common carrier : air carrier
Make Model Name	Widebody, Low Wing, 3 Turbojet Eng
Navigation In Use	Other
Flight Phase	cruise other descent other
Route In Use	enroute airway : zbw
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 150 flight time total : 5500
ASRS Report	107662
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 210 flight time total : 14000
ASRS Report	107661
Events
Anomaly	non adherence : clearance other anomaly
Independent Detector	other controllera
Resolutory Action	flight crew : returned to intended course or assigned course other
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Controller issued clearance to cross pvd at 11000', 250 KTS. I read back the clearance correctly but set 10000' in the altitude alerter by mistake. Approximately 11400' in descent we realized error but aircraft descended to approximately 10200' before we could get it 'bottomed out' and climb back to 11000'. Unsure why I set 10000' unless it was due to force of habit setting 10000/250 KT for home base arrival. Supplemental information from acn 107661. ATC called us passing through 10500', told us to maintain 11000', we climbed back to 11000'.

Original NASA ASRS Text

Title: ACR WDB ALT DEVIATION OVERSHOT DURING DESCENT. FO EQUATED 250 KT SPEED RESTRICTION WITH 10000' AND SET THIS ALT INTO THE ALT ALERT INSTEAD OF CLRNC ALT OF 11000'.

Narrative: CTLR ISSUED CLRNC TO CROSS PVD AT 11000', 250 KTS. I READ BACK THE CLRNC CORRECTLY BUT SET 10000' IN THE ALT ALERTER BY MISTAKE. APPROX 11400' IN DSCNT WE REALIZED ERROR BUT ACFT DSNDED TO APPROX 10200' BEFORE WE COULD GET IT 'BOTTOMED OUT' AND CLB BACK TO 11000'. UNSURE WHY I SET 10000' UNLESS IT WAS DUE TO FORCE OF HABIT SETTING 10000/250 KT FOR HOME BASE ARR. SUPPLEMENTAL INFO FROM ACN 107661. ATC CALLED US PASSING THROUGH 10500', TOLD US TO MAINTAIN 11000', WE CLBED BACK TO 11000'.

Data retrieved from NASA's ASRS site as of August 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.