Airbus A319 flight crew started climbing to a higher altitude upon clearance from ARTCC who subsequently questioned their altitude and said that they had not been cleared to a higher altitude.

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Attributes
ACN	501270
Time
Date	200102
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : okc.airport
State Reference	OK
Altitude	msl bound lower : 31000 msl bound upper : 32000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zkc.artcc
Operator	common carrier : air carrier
Make Model Name	A319
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	cruise : enroute altitude change
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial pilot : cfi pilot : atp pilot : multi engine
Experience	flight time last 90 days : 100 flight time total : 9100 flight time type : 490
ASRS Report	501270
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : excursion from assigned altitude non adherence : clearance
Independent Detector	atc equipment other atc equipment : radar other controllera
Resolutory Action	controller : issued alert controller : issued new clearance
Supplementary
Problem Areas	Flight Crew Human Performance ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Level at FL290, control cleared us to FL310. We initiated climb. After initial clearance to FL310, he gave us clearance to FL370. As we were climbing through FL320, he asked us what our altitude was. We replied FL320. He stated 'I only gave you clearance to FL310.' we stated no, it was FL370. He then cleared us to FL330 and handed us off to next controller.

Original NASA ASRS Text

Title: AIRBUS A319 FLC STARTED CLBING TO A HIGHER ALT UPON CLRNC FROM ARTCC WHO SUBSEQUENTLY QUESTIONED THEIR ALT AND SAID THAT THEY HAD NOT BEEN CLRED TO A HIGHER ALT.

Narrative: LEVEL AT FL290, CTL CLRED US TO FL310. WE INITIATED CLB. AFTER INITIAL CLRNC TO FL310, HE GAVE US CLRNC TO FL370. AS WE WERE CLBING THROUGH FL320, HE ASKED US WHAT OUR ALT WAS. WE REPLIED FL320. HE STATED 'I ONLY GAVE YOU CLRNC TO FL310.' WE STATED NO, IT WAS FL370. HE THEN CLRED US TO FL330 AND HANDED US OFF TO NEXT CTLR.

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.