Altitude deviation altitude overshot -- clearance disputed air carrier crew receives and reads back an altitude clearance, but controller claims that they climbed above their assigned altitude.

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Attributes
ACN	314420
Time
Date	199508
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : tay airport : tpa
State Reference	FL
Altitude	msl bound lower : 22000 msl bound upper : 28000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zjx tower : cmx
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude
Route In Use	enroute airway : zjx
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 125 flight time total : 17000
ASRS Report	314420
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	altitude deviation : overshoot non adherence : clearance other anomaly other
Independent Detector	other controllera other flight crewa
Resolutory Action	controller : issued new clearance other other
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

We were in the climb out of tpa to bos, ZJX cleared us for further climb to FL280. I read back FL280, the first officer placed FL280 in the altimeter reminder, and I confirmed FL280 was set in window. As we were climbing out of FL230, the ZJX controller told us to stop climb at FL230 and turn right 30 degrees, he said we were only cleared to FL220. I said we copied FL280. No further comment was made. Our so confirmed that he also had heard the clearance to climb to FL280.

Original NASA ASRS Text

Title: ALTDEV ALT OVERSHOT -- CLRNC DISPUTED ACR CREW RECEIVES AND READS BACK AN ALT CLRNC, BUT CTLR CLAIMS THAT THEY CLBED ABOVE THEIR ASSIGNED ALT.

Narrative: WE WERE IN THE CLBOUT OF TPA TO BOS, ZJX CLRED US FOR FURTHER CLB TO FL280. I READ BACK FL280, THE FO PLACED FL280 IN THE ALTIMETER REMINDER, AND I CONFIRMED FL280 WAS SET IN WINDOW. AS WE WERE CLBING OUT OF FL230, THE ZJX CTLR TOLD US TO STOP CLB AT FL230 AND TURN R 30 DEGS, HE SAID WE WERE ONLY CLRED TO FL220. I SAID WE COPIED FL280. NO FURTHER COMMENT WAS MADE. OUR SO CONFIRMED THAT HE ALSO HAD HEARD THE CLRNC TO CLB TO FL280.

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.