<< >> NASA ASRS Report 407000, July 1998

An air carrier medium large transport advises ATC that they have a climbing air carrier 15 mi ahead on TCASII that had just flown through their altitude. Radar controller gives a left turn and aircraft passes 5 mi away at 1200 ft above air carrier X.

Attributes
ACN	407000
Time
Date	199807
Day	Thu
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : tul
State Reference	OK
Altitude	msl bound lower : 31000 msl bound upper : 31000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zkc
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	cruise other
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	climbout : intermediate altitude
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 : 14500 flight time type : 10000
ASRS Report	407000
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	altitude deviation : undershoot conflict : ground less severe inflight encounter : weather non adherence : published procedure other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	controller : issued new clearance other
Consequence	Other
Miss Distance	horizontal : 30000 vertical : 1200
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	other

Narrative:

We were cruising at FL310, deviating around a line of thunderstorms. There was a lot of opposite direction traffic that we noted on the TCASII. The TCASII then issued a traffic alert on an aircraft that was opposite direction, 1 O'clock position to us, approximately 15 mi away. He was also climbing, on our TCASII, was +1000 ft initially. We questioned the controller and he gave us an immediate turn approximately 60 degrees to the left toward the thunderstorm. The traffic passed to the right approximately 5 mi and 1200 ft higher. We then were cleared back to the west for deviation around the line.

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Original NASA ASRS Text

Title: AN ACR MLG ADVISES ATC THAT THEY HAVE A CLBING ACR 15 MI AHEAD ON TCASII THAT HAD JUST FLOWN THROUGH THEIR ALT. RADAR CTLR GIVES A L TURN AND ACFT PASSES 5 MI AWAY AT 1200 FT ABOVE ACR X.

Narrative: WE WERE CRUISING AT FL310, DEVIATING AROUND A LINE OF TSTMS. THERE WAS A LOT OF OPPOSITE DIRECTION TFC THAT WE NOTED ON THE TCASII. THE TCASII THEN ISSUED A TFC ALERT ON AN ACFT THAT WAS OPPOSITE DIRECTION, 1 O'CLOCK POS TO US, APPROX 15 MI AWAY. HE WAS ALSO CLBING, ON OUR TCASII, WAS +1000 FT INITIALLY. WE QUESTIONED THE CTLR AND HE GAVE US AN IMMEDIATE TURN APPROX 60 DEGS TO THE L TOWARD THE TSTM. THE TFC PASSED TO THE R APPROX 5 MI AND 1200 FT HIGHER. WE THEN WERE CLRED BACK TO THE W FOR DEV AROUND THE LINE.

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.