Pilot of an small transport twin turbo propeller overshot departure assigned altitude and was correcting back when ATC also brought the deviation to his attention.

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Attributes
ACN	328520
Time
Date	199602
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : pxr airport : phx
State Reference	AZ
Altitude	msl bound lower : 8000 msl bound upper : 8500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : phx
Operator	common carrier : air taxi
Make Model Name	Conquest I/Conquest II
Operating Under FAR Part	Part 135
Flight Phase	climbout : intermediate altitude
Route In Use	departure other enroute : on vectors
Flight Plan	VFR
Person 1
Affiliation	company : air taxi
Function	flight crew : single pilot
Qualification	other other : other pilot : instrument pilot : commercial pilot : atp
Experience	flight time last 90 days : 100 flight time total : 7000 flight time type : 1600
ASRS Report	328520
Person 2
Affiliation	government : faa
Function	controller : departure
Qualification	controller : radar
Events
Anomaly	altitude deviation : overshoot non adherence : clearance
Independent Detector	other controllera 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:

While descending phx I was being vectored. I was told to climb to 8000 ft plus resume own navigation. (On course) I turned to 330 degrees and went through my assigned altitude by 300-400 ft. When I noticed the deviation I quickly corrected it before the controller noticed but before returning to 8000 ft. The controller said that I had been 500 ft higher than assigned. This was no one's fault but my own. I will be much more careful in the future.

Original NASA ASRS Text

Title: PLT OF AN SMT TWIN TURBO PROP OVERSHOT DEP ASSIGNED ALT AND WAS CORRECTING BACK WHEN ATC ALSO BROUGHT THE DEV TO HIS ATTN.

Narrative: WHILE DSNDING PHX I WAS BEING VECTORED. I WAS TOLD TO CLB TO 8000 FT PLUS RESUME OWN NAV. (ON COURSE) I TURNED TO 330 DEGS AND WENT THROUGH MY ASSIGNED ALT BY 300-400 FT. WHEN I NOTICED THE DEV I QUICKLY CORRECTED IT BEFORE THE CTLR NOTICED BUT BEFORE RETURNING TO 8000 FT. THE CTLR SAID THAT I HAD BEEN 500 FT HIGHER THAN ASSIGNED. THIS WAS NO ONE'S FAULT BUT MY OWN. I WILL BE MUCH MORE CAREFUL IN THE FUTURE.

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.