Crossing restr confusion on arrival at dfw, tx.

Attributes
ACN	480180
Time
Date	200007
Day	Sun
Local Time Of Day	1801 To 2400
Place
Locale Reference	intersection : lemyn
State Reference	TX
Altitude	msl single value : 12300
Environment
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B757 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	descent : intermediate altitude
Route In Use	arrival star : n/s
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : commercial pilot : instrument
ASRS Report	480180
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	479704
Events
Anomaly	altitude deviation : crossing restriction not met non adherence : clearance other anomaly other
Independent Detector	other flight crewa other flight crewb
Resolutory Action	none taken : anomaly accepted
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Descending into dfw area for lemyn, ATC issued clearance to cross at 11000 ft, 250 KTS. Later, ATC came back with delete speed at lemyn and make stonz restr. The amended clearance was interpreted to lift all restrs at lemyn and as a result crossed lemyn at 12300 ft. There was no response from ATC regarding this issue. Next time, will clarify clearance at issuance.

Original NASA ASRS Text

Title: XING RESTR CONFUSION ON ARR AT DFW, TX.

Narrative: DSNDING INTO DFW AREA FOR LEMYN, ATC ISSUED CLRNC TO CROSS AT 11000 FT, 250 KTS. LATER, ATC CAME BACK WITH DELETE SPD AT LEMYN AND MAKE STONZ RESTR. THE AMENDED CLRNC WAS INTERPED TO LIFT ALL RESTRS AT LEMYN AND AS A RESULT CROSSED LEMYN AT 12300 FT. THERE WAS NO RESPONSE FROM ATC REGARDING THIS ISSUE. NEXT TIME, WILL CLARIFY CLRNC AT ISSUANCE.

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.