Flight crew of a dehavilland dash 8 inadvertently misset the altimeter when climbing through FL180 resulting in leveling off 900 ft high. Mistake was suspected by the ARTCC controller who questioned their altimeter setting.

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Attributes
ACN	497350
Time
Date	200101
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	navaid : anc.vor
State Reference	AK
Altitude	msl bound lower : 21000 msl bound upper : 21900
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zan.artcc
Operator	common carrier : air carrier
Make Model Name	Dash 8 Series Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	other other vortac
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : atp pilot : commercial
Experience	flight time last 90 days : 150 flight time total : 4850 flight time type : 650
ASRS Report	497350
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : multi engine pilot : commercial
Events
Anomaly	altitude deviation : overshoot non adherence : far non adherence other
Independent Detector	atc equipment other atc equipment : radar aircraft equipment other aircraft equipment : altimeter other controllera
Resolutory Action	controller : issued alert flight crew : returned to assigned altitude other
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Departed anc airport, altimeter was low 28.64. Climbing through FL180, I set and called '92 on the left,' first officer called '92 on the right.' after being level in cruise for 5 mins, ATC asked us to rechk altimeter. He was showing us 800-900 ft high. Upon checking our altimeter setting, we realized we had reset 28.92 instead of 29.92 out of FL180. We reset our altimeter, descended to our assigned altitude of FL210, and proceeded to our destination. At no time was there a loss of separation with other aircraft, and ATC made no further mention of the situation.

Original NASA ASRS Text

Title: FLC OF A DEHAVILLAND DASH 8 INADVERTENTLY MISSET THE ALTIMETER WHEN CLBING THROUGH FL180 RESULTING IN LEVELING OFF 900 FT HIGH. MISTAKE WAS SUSPECTED BY THE ARTCC CTLR WHO QUESTIONED THEIR ALTIMETER SETTING.

Narrative: DEPARTED ANC ARPT, ALTIMETER WAS LOW 28.64. CLBING THROUGH FL180, I SET AND CALLED '92 ON THE L,' FO CALLED '92 ON THE R.' AFTER BEING LEVEL IN CRUISE FOR 5 MINS, ATC ASKED US TO RECHK ALTIMETER. HE WAS SHOWING US 800-900 FT HIGH. UPON CHKING OUR ALTIMETER SETTING, WE REALIZED WE HAD RESET 28.92 INSTEAD OF 29.92 OUT OF FL180. WE RESET OUR ALTIMETER, DSNDED TO OUR ASSIGNED ALT OF FL210, AND PROCEEDED TO OUR DEST. AT NO TIME WAS THERE A LOSS OF SEPARATION WITH OTHER ACFT, AND ATC MADE NO FURTHER MENTION OF THE SIT.

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.