A CE650 climbs to 11000 ft on climb clearance from iad departure controller. Second controller disputes this when aircraft levels at 11000 ft, saying they were assigned 10000 ft. Crew disputes this.

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Attributes
ACN	399400
Time
Date	199804
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : iad
State Reference	DC
Altitude	msl bound lower : 10000 msl bound upper : 11000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : iad tower : pit
Operator	general aviation : corporate
Make Model Name	Citation III, VI, VII
Operating Under FAR Part	Part 91
Navigation In Use	Other Other
Flight Phase	climbout : intermediate altitude cruise other
Route In Use	departure other enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 90 flight time total : 8000 flight time type : 600
ASRS Report	399400
Person 2
Affiliation	Other
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial pilot : atp
Experience	flight time last 90 days : 25 flight time total : 3200 flight time type : 300
ASRS Report	399398
Events
Anomaly	altitude deviation : overshoot non adherence : published procedure non adherence : clearance other anomaly other
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance other
Consequence	Other
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Deviation Pilot Deviation

Narrative:

We were leaving iad to phf, takeoff to south (runway 19R) vectored north. Climbed to 7000 ft, given climb to 11000 ft by first controller, handed off to frequency 125.65 and had leveled off at 11000 ft and controller said 'maintain 10000 ft.' we stated we were given (and read back) 11000 ft. He said, 'no, 10000 ft.' 11000 ft was set in altitude controller confirmed by both pilots and read back to controller as climbing to 11000 ft. This is possibly another case of controller listening back to our readback of his/her instructions. Controller was very cordial. There were no TCASII TA's or RA's. Supplemental information from acn 399398: the controller never questioned the readback of 11000 ft. I do believe that we were cleared to 11000 ft because when I am the PF, my procedure is to listen to readback of PNF and watch to make sure that the correct readback is set in altitude select window, which is exactly what happened during this incident.

Original NASA ASRS Text

Title: A CE650 CLBS TO 11000 FT ON CLB CLRNC FROM IAD DEP CTLR. SECOND CTLR DISPUTES THIS WHEN ACFT LEVELS AT 11000 FT, SAYING THEY WERE ASSIGNED 10000 FT. CREW DISPUTES THIS.

Narrative: WE WERE LEAVING IAD TO PHF, TKOF TO S (RWY 19R) VECTORED N. CLBED TO 7000 FT, GIVEN CLB TO 11000 FT BY FIRST CTLR, HANDED OFF TO FREQ 125.65 AND HAD LEVELED OFF AT 11000 FT AND CTLR SAID 'MAINTAIN 10000 FT.' WE STATED WE WERE GIVEN (AND READ BACK) 11000 FT. HE SAID, 'NO, 10000 FT.' 11000 FT WAS SET IN ALT CTLR CONFIRMED BY BOTH PLTS AND READ BACK TO CTLR AS CLBING TO 11000 FT. THIS IS POSSIBLY ANOTHER CASE OF CTLR LISTENING BACK TO OUR READBACK OF HIS/HER INSTRUCTIONS. CTLR WAS VERY CORDIAL. THERE WERE NO TCASII TA'S OR RA'S. SUPPLEMENTAL INFO FROM ACN 399398: THE CTLR NEVER QUESTIONED THE READBACK OF 11000 FT. I DO BELIEVE THAT WE WERE CLRED TO 11000 FT BECAUSE WHEN I AM THE PF, MY PROC IS TO LISTEN TO READBACK OF PNF AND WATCH TO MAKE SURE THAT THE CORRECT READBACK IS SET IN ALT SELECT WINDOW, WHICH IS EXACTLY WHAT HAPPENED DURING THIS 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.