An medium large transport air carrier crew misset their altimeters on descent.

Attributes
ACN	211000
Time
Date	199205
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : cvg
State Reference	OH
Altitude	msl bound lower : 11000 msl bound upper : 11300
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zob artcc : zma
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	cruise other descent : approach descent other
Route In Use	enroute airway : cvg
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : commercial pilot : instrument pilot : atp
Experience	flight time last 90 days : 230 flight time total : 12000 flight time type : 2400
ASRS Report	211000
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	altitude deviation : undershoot non adherence : clearance other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation other

Narrative:

Descending into cvg, we leveled at 11000 ft on an altimeter of 3004. As we leveled off and discovered the altimeter was actually 3034, we descended a little more to correct this error. This, and other errors I made throughout the day, were a direct result of fatigue brought on by the drastic change in my sleep pattern. I was not fully adjusted until the following day.

Original NASA ASRS Text

Title: AN MLG AIR CARRIER CREW MISSET THEIR ALTIMETERS ON DSCNT.

Narrative: DSNDING INTO CVG, WE LEVELED AT 11000 FT ON AN ALTIMETER OF 3004. AS WE LEVELED OFF AND DISCOVERED THE ALTIMETER WAS ACTUALLY 3034, WE DSNDED A LITTLE MORE TO CORRECT THIS ERROR. THIS, AND OTHER ERRORS I MADE THROUGHOUT THE DAY, WERE A DIRECT RESULT OF FATIGUE BROUGHT ON BY THE DRASTIC CHANGE IN MY SLEEP PATTERN. I WAS NOT FULLY ADJUSTED UNTIL THE FOLLOWING DAY.

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.