TCASII RA flown in IFR conditions in class a airspace.

Attributes
ACN	492084
Time
Date	200011
Day	Sun
Place
Locale Reference	navaid : okk.vor
State Reference	IN
Altitude	msl single value : 29000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zid.artcc tower : bkl.tower
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 2 Turbojet Eng
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : zid.artcc
Operator	common carrier : air carrier
Make Model Name	Medium Transport, Low Wing, 2 Turbojet Eng
Operating Under FAR Part	Part 121
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 10000 flight time type : 1500
ASRS Report	492084
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : multi engine pilot : commercial
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation
Independent Detector	aircraft equipment : tcas
Resolutory Action	controller : issued new clearance flight crew : took evasive action
Miss Distance	horizontal : 24000 vertical : 500
Supplementary
Problem Areas	ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Level at FL290 as per clearance, received TA, then RA 'descend' in response to conflicting traffic opposite direction level at same altitude. The first officer executed evasive maneuver in accordance with standard operating procedure. ATC was advised of RA, ATC then issued 20 degrees left turn clearance. Conflicting traffic also performed an evasive maneuver. All 3 pilots aboard monitoring ATC during incident. Altitude was intermediate altitude issued by ATC. ATC issued frequency change after conflict. Next controller issued final climb to FL370.

Original NASA ASRS Text

Title: TCASII RA FLOWN IN IFR CONDITIONS IN CLASS A AIRSPACE.

Narrative: LEVEL AT FL290 AS PER CLRNC, RECEIVED TA, THEN RA 'DSND' IN RESPONSE TO CONFLICTING TFC OPPOSITE DIRECTION LEVEL AT SAME ALT. THE FO EXECUTED EVASIVE MANEUVER IN ACCORDANCE WITH STANDARD OPERATING PROC. ATC WAS ADVISED OF RA, ATC THEN ISSUED 20 DEGS L TURN CLRNC. CONFLICTING TFC ALSO PERFORMED AN EVASIVE MANEUVER. ALL 3 PLTS ABOARD MONITORING ATC DURING INCIDENT. ALT WAS INTERMEDIATE ALT ISSUED BY ATC. ATC ISSUED FREQ CHANGE AFTER CONFLICT. NEXT CTLR ISSUED FINAL CLB TO FL370.

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.