Widebody transport was allowed to climb through altitude of an large transport.

Attributes
ACN	105790
Time
Date	198903
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : dfw
State Reference	TX
Altitude	msl bound lower : 10000 msl bound upper : 11700
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : dfw artcc : zdc
Operator	common carrier : air carrier
Make Model Name	Widebody, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	climbout : intermediate altitude
Route In Use	departure other
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	descent other
Route In Use	arrival other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 40 flight time total : 13000 flight time type : 500
ASRS Report	105790
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	conflict : airborne less severe non adherence : published procedure non adherence : required legal separation
Independent Detector	other controllera other flight crewa
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Miss Distance	horizontal : 1500 vertical : 700
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Dfw departure cleared us to 17000', then advised traffic opp direction at 11 O'clock at 11000' MSL assigned. We saw the large transport when we were passing 11000' MSL. We then advised ATC of visibility contact and queried altitude assigned. ATC replied 10000'! All 3 (2 pilots and 1 ATC controller) of us confirmed the clearance and read back to 17000'.

Original NASA ASRS Text

Title: WDB WAS ALLOWED TO CLIMB THROUGH ALT OF AN LGT.

Narrative: DFW DEP CLRED US TO 17000', THEN ADVISED TFC OPP DIRECTION AT 11 O'CLOCK AT 11000' MSL ASSIGNED. WE SAW THE LGT WHEN WE WERE PASSING 11000' MSL. WE THEN ADVISED ATC OF VIS CONTACT AND QUERIED ALT ASSIGNED. ATC REPLIED 10000'! ALL 3 (2 PLTS AND 1 ATC CTLR) OF US CONFIRMED THE CLRNC AND READ BACK TO 17000'.

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.