Altitude deviation. Overshoot in descent. Readback hearback problem.

Attributes
ACN	131944
Time
Date	198912
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : lrp
State Reference	PA
Altitude	msl bound lower : 10000 msl bound upper : 11000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zny tower : san
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	descent other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer pilot : instrument pilot : commercial pilot : atp
Experience	flight time last 90 days : 210 flight time total : 13500 flight time type : 210
ASRS Report	131944
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	altitude deviation : overshoot 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	Operational Deviation

Narrative:

Heard and read back 'cross 10 west of lancaster at 10M.' set 10000' in altitude window and descended to 10000'. At 10000' controller asked altitude '10M,' and he said clearance was to 11000'. I said we had set 10000' in the altitude window. He said it was not a problem, but I was not sure.

Original NASA ASRS Text

Title: ALT DEVIATION. OVERSHOOT IN DESCENT. READBACK HEARBACK PROBLEM.

Narrative: HEARD AND READ BACK 'CROSS 10 W OF LANCASTER AT 10M.' SET 10000' IN ALT WINDOW AND DSNDED TO 10000'. AT 10000' CTLR ASKED ALT '10M,' AND HE SAID CLRNC WAS TO 11000'. I SAID WE HAD SET 10000' IN THE ALT WINDOW. HE SAID IT WAS NOT A PROB, BUT I WAS NOT SURE.

Data retrieved from NASA's ASRS site as of August 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.