An ARTCC radar controller cleared an HS125 cpr flight crew to 8000 ft, but apparently meant to clear them to 10000 ft. The controller became irate when he realized what had happened.

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Attributes
ACN	347520
Time
Date	199609
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : djb
State Reference	OH
Altitude	msl bound lower : 8000 msl bound upper : 10000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zob
Operator	general aviation : corporate
Make Model Name	HS 125 Series 1-600
Operating Under FAR Part	Part 91
Navigation In Use	Other
Flight Phase	descent other
Route In Use	arrival other arrival star : star
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : first officer
Qualification	pilot : cfi pilot : atp
Experience	flight time last 90 days : 164 flight time total : 8000 flight time type : 1500
ASRS Report	347520
Person 2
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : commercial pilot : instrument pilot : atp
Experience	flight time last 90 days : 140 flight time total : 10050 flight time type : 500
ASRS Report	347030
Events
Anomaly	other anomaly other
Independent Detector	other controllera
Resolutory Action	none taken : detected after the fact
Consequence	Other
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	other

Narrative:

ATC, ZOB, cleared us to cross junka intersection at 8000 ft. PNF read back clearance, PF (me) set 8000 ft into altitude preselect, and PNF confirmed setting was correct. After completing descent, an irate controller demanded to know our altitude stating we were cleared to 10000 ft. We promptly informed him of his error. Unknowingly, the controller failed to release his push- to-talk switch and we heard him tell detroit approach on the phone that he had cleared us to 10000 ft and we went to 8000 ft on our own. Fortunately, no conflict occurred. Detroit approach made no comments about the incident.

Original NASA ASRS Text

Title: AN ARTCC RADAR CTLR CLRED AN HS125 CPR FLC TO 8000 FT, BUT APPARENTLY MEANT TO CLR THEM TO 10000 FT. THE CTLR BECAME IRATE WHEN HE REALIZED WHAT HAD HAPPENED.

Narrative: ATC, ZOB, CLRED US TO CROSS JUNKA INTXN AT 8000 FT. PNF READ BACK CLRNC, PF (ME) SET 8000 FT INTO ALT PRESELECT, AND PNF CONFIRMED SETTING WAS CORRECT. AFTER COMPLETING DSCNT, AN IRATE CTLR DEMANDED TO KNOW OUR ALT STATING WE WERE CLRED TO 10000 FT. WE PROMPTLY INFORMED HIM OF HIS ERROR. UNKNOWINGLY, THE CTLR FAILED TO RELEASE HIS PUSH- TO-TALK SWITCH AND WE HEARD HIM TELL DETROIT APCH ON THE PHONE THAT HE HAD CLRED US TO 10000 FT AND WE WENT TO 8000 FT ON OUR OWN. FORTUNATELY, NO CONFLICT OCCURRED. DETROIT APCH MADE NO COMMENTS ABOUT THE INCIDENT.

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.