<< >> NASA ASRS Report 277667, July 1994

WX thunderstorms, aircraft deviations, center handoff to approach, not fully aware of deviations and mishandles traffic.

Attributes
ACN	277667
Time
Date	199407
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : cos
State Reference	CO
Altitude	msl bound lower : 10500 msl bound upper : 11000
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zdv tracon : cos tower : ict
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	cruise other
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	cruise other
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	controller : non radar pilot : flight engineer pilot : instrument pilot : commercial pilot : cfi
Experience	flight time last 90 days : 75 flight time total : 9000 flight time type : 2000
ASRS Report	277667
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	conflict : airborne less severe non adherence : far non adherence : required legal separation
Independent Detector	other flight crewa
Resolutory Action	controller : issued new clearance other
Consequence	Other
Miss Distance	horizontal : 3000 vertical : 500
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Intra Facility Coordination Failure Operational Error

Narrative:

We were deviating around thunderstorms. Approach asked us to turn to a heading which would take us directly into the cell. I declined. Then ATC told us to immediately descend to 10000 ft and turn right (into thunderstorm). I then got a TA on TCASII, complied with ATC. She then gave us traffic, a B-737, 12 O'clock, 1 mi at 11000 ft and apologized to us for the mishandling, stating it was a 'communication' problem. She also gave the other aircraft an evasive turn. I think ZDV failed to coordinate our WX deviation with cos approach.

Related reports:

• An A319 PIC offers as reasons for his continuation of a dest...
• Captain of a lear jet 35 deviated from assigned altitude and...
• An EMB145 flight crew experienced the digital ATIS altimeter...
• Small aircraft twin at high altitude gets involved with thun...
• An air carrier medium large transport had to deviate due to ...

	Enter your search terms Submit search form
	Web www.37000feet.com

Original NASA ASRS Text

Title: WX TSTMS, ACFT DEVS, CTR HDOF TO APCH, NOT FULLY AWARE OF DEVS AND MISHANDLES TFC.

Narrative: WE WERE DEVIATING AROUND TSTMS. APCH ASKED US TO TURN TO A HDG WHICH WOULD TAKE US DIRECTLY INTO THE CELL. I DECLINED. THEN ATC TOLD US TO IMMEDIATELY DSND TO 10000 FT AND TURN R (INTO TSTM). I THEN GOT A TA ON TCASII, COMPLIED WITH ATC. SHE THEN GAVE US TFC, A B-737, 12 O'CLOCK, 1 MI AT 11000 FT AND APOLOGIZED TO US FOR THE MISHANDLING, STATING IT WAS A 'COM' PROB. SHE ALSO GAVE THE OTHER ACFT AN EVASIVE TURN. I THINK ZDV FAILED TO COORDINATE OUR WX DEV WITH COS APCH.

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.