Air carrier X same altitude assigned had TCASII TA with aircraft Y.

Attributes
ACN	296510
Time
Date	199502
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : aml
State Reference	VA
Altitude	msl bound lower : 17000 msl bound upper : 17000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : dca tracon : iad tower : tpa
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	cruise other
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	other : unknown
Flight Phase	cruise other
Route In Use	enroute : direct
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 9000 flight time type : 4500
ASRS Report	296510
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 210 flight time total : 15000 flight time type : 10000
ASRS Report	296507
Events
Anomaly	conflict : airborne less severe
Independent Detector	aircraft equipment other aircraft equipment : unspecified other controllera
Resolutory Action	controller : issued new clearance other
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 18000 vertical : 0
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	other

Narrative:

Air carrier X had been cleared to and leveled off at 17000 ft and a 270 degree heading by washington departure control. We were then given a heading of 290 degrees and a handoff to dulles departure control. While we were changing frequencys we received a TCASII alert for traffic at our altitude, 10 O'clock and 5 mi. Dulles departure then gave us an immediate right turn to 340 degrees. While turning we requested a higher altitude and we were given FL190. No visual contact with the other aircraft was made and the closest the other aircraft Y appeared to come was 3 mi at the same altitude. Supplemental information from acn 296507: contacted dulles approach who gave us an immediate right turn to 340 degrees (urgency in tone of voice) and called the traffic at 10 O'clock, 3 mi wbound. When conflict was cleared, I inquired what happened. ATC said washington departure control was late in their handoff to dulles departure control hence the late turn and subsequent conflict. We were told we (pilots) were not at fault.

Original NASA ASRS Text

Title: ACR X SAME ALT ASSIGNED HAD TCASII TA WITH ACFT Y.

Narrative: ACR X HAD BEEN CLRED TO AND LEVELED OFF AT 17000 FT AND A 270 DEG HDG BY WASHINGTON DEP CTL. WE WERE THEN GIVEN A HDG OF 290 DEGS AND A HDOF TO DULLES DEP CTL. WHILE WE WERE CHANGING FREQS WE RECEIVED A TCASII ALERT FOR TFC AT OUR ALT, 10 O'CLOCK AND 5 MI. DULLES DEP THEN GAVE US AN IMMEDIATE R TURN TO 340 DEGS. WHILE TURNING WE REQUESTED A HIGHER ALT AND WE WERE GIVEN FL190. NO VISUAL CONTACT WITH THE OTHER ACFT WAS MADE AND THE CLOSEST THE OTHER ACFT Y APPEARED TO COME WAS 3 MI AT THE SAME ALT. SUPPLEMENTAL INFO FROM ACN 296507: CONTACTED DULLES APCH WHO GAVE US AN IMMEDIATE R TURN TO 340 DEGS (URGENCY IN TONE OF VOICE) AND CALLED THE TFC AT 10 O'CLOCK, 3 MI WBOUND. WHEN CONFLICT WAS CLRED, I INQUIRED WHAT HAPPENED. ATC SAID WASHINGTON DEP CTL WAS LATE IN THEIR HDOF TO DULLES DEP CTL HENCE THE LATE TURN AND SUBSEQUENT CONFLICT. WE WERE TOLD WE (PLTS) WERE NOT AT FAULT.

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.