CL65 flight crew fail to reset altimeter on descent, that is missed by aid and cvg controllers.

Attributes
ACN	502250
Time
Date	200102
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : cvg.airport
State Reference	KY
Altitude	msl single value : 9000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zid.artcc tracon : cvg.tracon tower : cvg.tower
Operator	common carrier : air carrier
Make Model Name	Regional Jet CL65, Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	descent : approach
Route In Use	arrival : on vectors
Flight Plan	IFR
Aircraft 2
Navigation In Use	other
Flight Phase	descent : approach
Route In Use	approach : visual arrival : on vectors
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : cfi
Experience	flight time last 90 days : 740 flight time total : 6700 flight time type : 3000
ASRS Report	502250
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : instrument pilot : commercial
Events
Anomaly	altitude deviation : overshoot non adherence : clearance non adherence : published procedure
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Supplementary
Problem Areas	ATC Human Performance Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Approximately 10 mins out from cincinnati, while in the initial descent, ATC cleared us down to 9000 ft MSL. Shortly thereafter, ATC cleared us down to 4000 ft MSL and then 3000 ft MSL. We were then cleared for the visual approach runway 18L and landed uneventfully. Later at the gate, my first officer noticed our altimeter was 300 ft off. We realized ATC probably never said anything because we really never leveled off anywhere except maybe once briefly at 9000 ft MSL.

Original NASA ASRS Text

Title: CL65 FLC FAIL TO RESET ALTIMETER ON DSCNT, THAT IS MISSED BY AID AND CVG CTLRS.

Narrative: APPROX 10 MINS OUT FROM CINCINNATI, WHILE IN THE INITIAL DSCNT, ATC CLRED US DOWN TO 9000 FT MSL. SHORTLY THEREAFTER, ATC CLRED US DOWN TO 4000 FT MSL AND THEN 3000 FT MSL. WE WERE THEN CLRED FOR THE VISUAL APCH RWY 18L AND LANDED UNEVENTFULLY. LATER AT THE GATE, MY FO NOTICED OUR ALTIMETER WAS 300 FT OFF. WE REALIZED ATC PROBABLY NEVER SAID ANYTHING BECAUSE WE REALLY NEVER LEVELED OFF ANYWHERE EXCEPT MAYBE ONCE BRIEFLY AT 9000 FT MSL.

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.