Altitude excursion, wrong altimeter setting.

Attributes
ACN	189823
Time
Date	199107
Day	Thu
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : ako
State Reference	CO
Altitude	msl bound lower : 14000 msl bound upper : 14300
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : corporate
Make Model Name	Small Aircraft, High Wing, 1 Eng, Fixed Gear
Flight Phase	cruise other
Route In Use	enroute airway : zdv
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : instrument pilot : commercial
Experience	flight time last 90 days : 30 flight time total : 850
ASRS Report	189823
Person 2
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Events
Anomaly	altitude deviation : excursion from assigned altitude other anomaly other
Independent Detector	other controllera
Resolutory Action	flight crew : returned to intended course or assigned course other
Consequence	faa : reviewed incident with flight crew
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

The other problem on this same flight came about 3 hours later at ako VOR (akron co). I was using ako altimeter setting which was 2 hours old but close to my previous setting at gld (goodland, ks). 29.83 and 29.84 denver's altitude setting was 30.32 and was given to me by center. I thought the older setting was more consistent with what I'd been hearing for the area. There was storms moving through the area and this is probably what made things change so fast. When I crossed ako I turned, adjusted radios, and got off altitude. I thought about 75 ft. Center informed me I was 300 ft high. I reset altitude and was ok. No other aircraft was involved in either instance. A contributing factor to both instances may have been that I started the flight after a full days work.

Original NASA ASRS Text

Title: ALT EXCURSION, WRONG ALTIMETER SETTING.

Narrative: THE OTHER PROBLEM ON THIS SAME FLT CAME ABOUT 3 HRS LATER AT AKO VOR (AKRON CO). I WAS USING AKO ALTIMETER SETTING WHICH WAS 2 HRS OLD BUT CLOSE TO MY PREVIOUS SETTING AT GLD (GOODLAND, KS). 29.83 AND 29.84 DENVER'S ALT SETTING WAS 30.32 AND WAS GIVEN TO ME BY CENTER. I THOUGHT THE OLDER SETTING WAS MORE CONSISTENT WITH WHAT I'D BEEN HEARING FOR THE AREA. THERE WAS STORMS MOVING THROUGH THE AREA AND THIS IS PROBABLY WHAT MADE THINGS CHANGE SO FAST. WHEN I CROSSED AKO I TURNED, ADJUSTED RADIOS, AND GOT OFF ALT. I THOUGHT ABOUT 75 FT. CENTER INFORMED ME I WAS 300 FT HIGH. I RESET ALT AND WAS OK. NO OTHER ACFT WAS INVOLVED IN EITHER INSTANCE. A CONTRIBUTING FACTOR TO BOTH INSTANCES MAY HAVE BEEN THAT I STARTED THE FLT AFTER A FULL DAYS WORK.

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.