Captain forgets to set his altimeter to proper setting during descent into dtw. First officer calls out to him his mistake, the captain then climbs back to cleared altitude.

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Attributes
ACN	359647
Time
Date	199701
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : dxo
State Reference	MI
Altitude	msl bound lower : 10600 msl bound upper : 11000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zob
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	descent other
Route In Use	arrival other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 220 flight time total : 12000 flight time type : 5000
ASRS Report	359647
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : flight engineer pilot : commercial pilot : atp
Experience	flight time last 90 days : 250 flight time total : 11500 flight time type : 2400
ASRS Report	359810
Events
Anomaly	altitude deviation : overshoot 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

Narrative:

I mistakenly set my altimeter to 30.68 during the in- range check, rather than 29.68. As we descended through 11000 ft, our assigned altitude at spica, the PNF observed the error and questioned the discrepancy. I immediately climbed back to 11000 ft. The lowest altitude was 10600 ft MSL. We should have verified each other's altimeters during the in-range check.

Original NASA ASRS Text

Title: CAPT FORGETS TO SET HIS ALTIMETER TO PROPER SETTING DURING DSCNT INTO DTW. FO CALLS OUT TO HIM HIS MISTAKE, THE CAPT THEN CLBS BACK TO CLRED ALT.

Narrative: I MISTAKENLY SET MY ALTIMETER TO 30.68 DURING THE IN- RANGE CHK, RATHER THAN 29.68. AS WE DSNDED THROUGH 11000 FT, OUR ASSIGNED ALT AT SPICA, THE PNF OBSERVED THE ERROR AND QUESTIONED THE DISCREPANCY. I IMMEDIATELY CLBED BACK TO 11000 FT. THE LOWEST ALT WAS 10600 FT MSL. WE SHOULD HAVE VERIFIED EACH OTHER'S ALTIMETERS DURING THE IN-RANGE CHK.

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.