<< >> NASA ASRS Report 456650, December 1999

Captain of a canadair CL65 regional jet overshot assigned altitude during climb due to prematurely setting the altimeter to 29 pt 92 for FL180 and above.

Attributes
ACN	456650
Time
Date	199912
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	navaid : dqn.vortac
State Reference	OH
Altitude	msl bound lower : 17000 msl bound upper : 17700
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zid.artcc
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 other vortac
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : cfi pilot : atp
Experience	flight time last 90 days : 160 flight time total : 11000 flight time type : 5000
ASRS Report	456650
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : commercial pilot : instrument
Events
Anomaly	altitude deviation : overshoot non adherence : published procedure non adherence : clearance
Independent Detector	aircraft equipment other aircraft equipment : fo altimeter other controllera other flight crewa
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:

Altitude bust. ATC cleared us to climb to 17000 ft. Passing 15000 ft, during the climb, I made the mistake of pushing the button that sets the altimeter setting to 29.92. The actual altimeter setting was about 30.75, so with the improper altimeter setting, the airplane leveled off at about 17700 ft. The first officer's altimeter setting was correct and he almost immediately noticed the discrepancy between the altimeters, and the altitude deviation. ATC also almost immediately noticed the altitude bust and provided us with the correct altimeter setting. When climbing to the flight level altitudes, it is my personal habit practice to set the altimeter to 29.92 when passing through 15000 ft. I was not paying enough attention and mistakenly set 29.92 when we were only climbing to 17000 ft.

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Original NASA ASRS Text

Title: CAPT OF A CANADAIR CL65 REGIONAL JET OVERSHOT ASSIGNED ALT DURING CLB DUE TO PREMATURELY SETTING THE ALTIMETER TO 29 PT 92 FOR FL180 AND ABOVE.

Narrative: ALT BUST. ATC CLRED US TO CLB TO 17000 FT. PASSING 15000 FT, DURING THE CLB, I MADE THE MISTAKE OF PUSHING THE BUTTON THAT SETS THE ALTIMETER SETTING TO 29.92. THE ACTUAL ALTIMETER SETTING WAS ABOUT 30.75, SO WITH THE IMPROPER ALTIMETER SETTING, THE AIRPLANE LEVELED OFF AT ABOUT 17700 FT. THE FO'S ALTIMETER SETTING WAS CORRECT AND HE ALMOST IMMEDIATELY NOTICED THE DISCREPANCY BTWN THE ALTIMETERS, AND THE ALTDEV. ATC ALSO ALMOST IMMEDIATELY NOTICED THE ALT BUST AND PROVIDED US WITH THE CORRECT ALTIMETER SETTING. WHEN CLBING TO THE FLT LEVEL ALTS, IT IS MY PERSONAL HABIT PRACTICE TO SET THE ALTIMETER TO 29.92 WHEN PASSING THROUGH 15000 FT. I WAS NOT PAYING ENOUGH ATTN AND MISTAKENLY SET 29.92 WHEN WE WERE ONLY CLBING TO 17000 FT.

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.