Air carrier large transport climbing to 12000 ft. Captain checking distance to sunss intersection overshot altitude by 300 ft. No conflicting traffic.

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Attributes
ACN	370530
Time
Date	199706
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : tus
State Reference	AZ
Altitude	msl bound lower : 12000 msl bound upper : 12300
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zab
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	climbout : intermediate altitude cruise other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 210 flight time total : 6000 flight time type : 450
ASRS Report	370530
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : overshoot non adherence : clearance non adherence : far
Independent Detector	other flight crewa
Resolutory Action	flight crew : returned to assigned altitude
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Short, low altitude flight between tus and phx. 2 man crew. Captain (PF) checking distance to fix near 12000 ft MSL leveloff, while I was getting ATIS for phx. We leveled off at 12300 ft MSL and immediately descended to 12000 ft MSL. Altimeter settings at tus and phx varied by 100 ft. I had not changed to phx altimeter setting yet. Captain had already changed over to phx altimeter setting. I don't know what center showed on their screen. There was no conflicting traffic.

Original NASA ASRS Text

Title: ACR LGT CLBING TO 12000 FT. CAPT CHKING DISTANCE TO SUNSS INTXN OVERSHOT ALT BY 300 FT. NO CONFLICTING TFC.

Narrative: SHORT, LOW ALT FLT BTWN TUS AND PHX. 2 MAN CREW. CAPT (PF) CHKING DISTANCE TO FIX NEAR 12000 FT MSL LEVELOFF, WHILE I WAS GETTING ATIS FOR PHX. WE LEVELED OFF AT 12300 FT MSL AND IMMEDIATELY DSNDED TO 12000 FT MSL. ALTIMETER SETTINGS AT TUS AND PHX VARIED BY 100 FT. I HAD NOT CHANGED TO PHX ALTIMETER SETTING YET. CAPT HAD ALREADY CHANGED OVER TO PHX ALTIMETER SETTING. I DON'T KNOW WHAT CTR SHOWED ON THEIR SCREEN. THERE WAS NO CONFLICTING TFC.

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.