Air carrier aircraft overshot altitude in climb in ZLC airspace.

Attributes
ACN	413540
Time
Date	199809
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : bzn
State Reference	MT
Altitude	msl bound lower : 14000 msl bound upper : 14500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zlc
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 14000 flight time type : 3000
ASRS Report	413540
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	altitude deviation : overshoot non adherence : clearance
Independent Detector	other controllera
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:

Bzn-sea, requested and received departure clearance to VFR climb on course. ATC also cleared us to 14000 ft. At 13500 ft, we requested a higher altitude and were told that we were not in radar contact and to remain at 14000 ft. We leveled at 14000 ft. Approximately 1 min later, ATC reported us at 14500 ft, descending to 14000 ft. I don't understand how the controller could say we were at 14500 ft when all our instruments indicated 14000 ft. We had no other complaints about our transponder. There was no corrective action taken because there was nothing to correct.

Original NASA ASRS Text

Title: ACR ACFT OVERSHOT ALT IN CLB IN ZLC AIRSPACE.

Narrative: BZN-SEA, REQUESTED AND RECEIVED DEP CLRNC TO VFR CLB ON COURSE. ATC ALSO CLRED US TO 14000 FT. AT 13500 FT, WE REQUESTED A HIGHER ALT AND WERE TOLD THAT WE WERE NOT IN RADAR CONTACT AND TO REMAIN AT 14000 FT. WE LEVELED AT 14000 FT. APPROX 1 MIN LATER, ATC RPTED US AT 14500 FT, DSNDING TO 14000 FT. I DON'T UNDERSTAND HOW THE CTLR COULD SAY WE WERE AT 14500 FT WHEN ALL OUR INSTS INDICATED 14000 FT. WE HAD NO OTHER COMPLAINTS ABOUT OUR XPONDER. THERE WAS NO CORRECTIVE ACTION TAKEN BECAUSE THERE WAS NOTHING TO CORRECT.

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.