<< >> NASA ASRS Report 543879, April 2002

System error as 2 air carrier aircraft come within 3 mi of each other with 300 ft vertical separation, one climbing, other descending, 50 NM northeast of draik intersection, va.

Attributes
ACN	543879
Time
Date	200204
Day	Tue
Local Time Of Day	1801 To 2400
Place
Locale Reference	intersection : draik
State Reference	VA
Altitude	msl single value : 28300
Environment
Flight Conditions	IMC
Light	Night
Aircraft 1
Controlling Facilities	artcc : zdc.artcc
Operator	common carrier : air carrier
Make Model Name	A320
Operating Under FAR Part	Part 121
Flight Phase	cruise : enroute altitude change
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : zdc.artcc
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	cruise : enroute altitude change
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : instrument pilot : commercial
Experience	flight time last 90 days : 19
ASRS Report	543879
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time type : 1224
ASRS Report	543881
Events
Anomaly	conflict : airborne less severe non adherence : published procedure non adherence : required legal separation other anomaly other
Independent Detector	other flight crewa other flight crewb
Resolutory Action	flight crew : took evasive action
Consequence	other
Miss Distance	horizontal : 18000 vertical : 300
Supplementary
Problem Areas	Flight Crew Human Performance ATC Human Performance Airport
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

At approximately XA39Z, while level at FL280, ATC cleared us to climb to FL310. Shortly after starting climb (approximately FL283), we got a TCASII TA followed by an RA from what appeared to be an air carrier flight who appeared to be descending out of FL290. We initiated RA action by descending to approximately FL280 while they responded by climbing. Estimated separation appeared to be approximately 3 mi and 300 ft vertically. Supplemental information from acn 543881: our approximately position was 50 mi northeast of draik intersection sebound on the airway.

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Original NASA ASRS Text

Title: SYS ERROR AS 2 ACR ACFT COME WITHIN 3 MI OF EACH OTHER WITH 300 FT VERT SEPARATION, ONE CLBING, OTHER DSNDING, 50 NM NE OF DRAIK INTXN, VA.

Narrative: AT APPROX XA39Z, WHILE LEVEL AT FL280, ATC CLRED US TO CLB TO FL310. SHORTLY AFTER STARTING CLB (APPROX FL283), WE GOT A TCASII TA FOLLOWED BY AN RA FROM WHAT APPEARED TO BE AN ACR FLT WHO APPEARED TO BE DSNDING OUT OF FL290. WE INITIATED RA ACTION BY DSNDING TO APPROX FL280 WHILE THEY RESPONDED BY CLBING. ESTIMATED SEPARATION APPEARED TO BE APPROX 3 MI AND 300 FT VERTICALLY. SUPPLEMENTAL INFO FROM ACN 543881: OUR APPROX POS WAS 50 MI NE OF DRAIK INTXN SEBOUND ON THE AIRWAY.

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.