A corporate first officer had an altitude deviation during departure from phx airport.

Attributes
ACN	1183877
Time
Date	201406
Local Time Of Day	0601-1200
Place
Locale Reference	PHX.Airport
State Reference	AZ
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	Initial Climb
Route In Use	Vectors
Person 1
Function	Pilot Not Flying First Officer
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 60 Flight Crew Total 25000 Flight Crew Type 4000
Events
Anomaly	ATC Issue All Types Deviation - Altitude Overshoot Deviation - Procedural Clearance

Narrative:

VFR departure out of sdl. Positive control by phx ATC departure. Controller asked what altitude was requested. Responded 15;500. Controller responded back. I heard climb to 15;500. I readback cleared 15;500. Controller later said the clearance was to 5;500. Very similar numbers may have caused error.

Original NASA ASRS Text

Title: A corporate First Officer had an altitude deviation during departure from PHX airport.

Narrative: VFR departure out of SDL. Positive control by PHX ATC departure. Controller asked what altitude was requested. Responded 15;500. Controller responded back. I heard climb to 15;500. I readback cleared 15;500. Controller later said the clearance was to 5;500. Very similar numbers may have caused error.

Data retrieved from NASA's ASRS site 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.