Potential conflict occurs between a departing, climbing MD80 and a level unidented aircraft at 11000...

Attributes
ACN	594359
Time
Date	200309
Day	Thu
Place
Locale Reference	atc facility : pct.tracon
State Reference	MD
Altitude	msl bound lower : 10000 msl bound upper : 11000
Aircraft 1
Controlling Facilities	tracon : pct.tracon
Operator	common carrier : air carrier
Make Model Name	MD-80 Super 80
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	594359
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation other anomaly other
Independent Detector	aircraft equipment : tcas other controllera
Resolutory Action	flight crew : took precautionary avoidance action
Miss Distance	horizontal : 16500 vertical : 400
Supplementary
Problem Areas	ATC Human Performance Airspace Structure Flight Crew Human Performance
Primary Problem	Ambiguous
Air Traffic Incident	Operational Error

Narrative:

TCASII RA on climb out. After takeoff from bwi, we were given instructions, for best rate of climb through 11000 ft. Out of 10000 ft received TA and contact observed on display at 1:30 O'clock position, about 5 mi and also visually. Within seconds with contact at 1:30 O'clock position at 3-4 mi received monitor vertical speed and ivsi indications to essentially leveloff. Followed advisory commands. Contact was apparently in a turn as it passed 2 1/2 to 3 mi abeam at +400 ft or so. Both aircraft reported RA to potomac departure control.

Original NASA ASRS Text

Title: POTENTIAL CONFLICT OCCURS BTWN A DEPARTING, CLBING MD80 AND A LEVEL UNIDENTED ACFT AT 11000 FT NEAR BWI, MD.

Narrative: TCASII RA ON CLBOUT. AFTER TKOF FROM BWI, WE WERE GIVEN INSTRUCTIONS, FOR BEST RATE OF CLB THROUGH 11000 FT. OUT OF 10000 FT RECEIVED TA AND CONTACT OBSERVED ON DISPLAY AT 1:30 O'CLOCK POS, ABOUT 5 MI AND ALSO VISUALLY. WITHIN SECONDS WITH CONTACT AT 1:30 O'CLOCK POS AT 3-4 MI RECEIVED MONITOR VERT SPD AND IVSI INDICATIONS TO ESSENTIALLY LEVELOFF. FOLLOWED ADVISORY COMMANDS. CONTACT WAS APPARENTLY IN A TURN AS IT PASSED 2 1/2 TO 3 MI ABEAM AT +400 FT OR SO. BOTH ACFT RPTED RA TO POTOMAC DEP CTL.

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.

Potential conflict occurs between a departing, climbing MD80 and a level unidented aircraft at 11000 ft near bwi, md.