Flight crew of medium large transport during climb out and while avoiding WX cells is issued traffic which they cannot see. As they fly around a cell they sight the traffic at 2 O'clock and 1 mi about 100 ft above. TCASII RA activates.

Home

Browse by month

Random

Latest

About

Contact

Attributes
ACN	388520
Time
Date	199711
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : sea
State Reference	WA
Altitude	msl bound lower : 16000 msl bound upper : 16000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zse
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	climbout : intermediate altitude
Route In Use	departure sid : sid
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	other : unknown
Flight Phase	cruise other
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 250 flight time total : 14000 flight time type : 4000
ASRS Report	388520
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	conflict : airborne less severe inflight encounter : weather other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other controllera other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 6000 vertical : 100
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other

Narrative:

Ellma 6 departure from seatac deviating for WX. Climbing through 16000 ft, saw aircraft. Callback conversation with reporter revealed the following information: reporter states they were climbing and had been given TA but had not sighted traffic. They then saw the traffic on TCASII and as they came around a cell they had deviated around there was the aircraft at 2 O'clock and 1 mi. TCASII gave an RA and they deviated left and descended to avoid the traffic.

Original NASA ASRS Text

Title: FLC OF MLG DURING CLBOUT AND WHILE AVOIDING WX CELLS IS ISSUED TFC WHICH THEY CANNOT SEE. AS THEY FLY AROUND A CELL THEY SIGHT THE TFC AT 2 O'CLOCK AND 1 MI ABOUT 100 FT ABOVE. TCASII RA ACTIVATES.

Narrative: ELLMA 6 DEP FROM SEATAC DEVIATING FOR WX. CLBING THROUGH 16000 FT, SAW ACFT. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATES THEY WERE CLBING AND HAD BEEN GIVEN TA BUT HAD NOT SIGHTED TFC. THEY THEN SAW THE TFC ON TCASII AND AS THEY CAME AROUND A CELL THEY HAD DEVIATED AROUND THERE WAS THE ACFT AT 2 O'CLOCK AND 1 MI. TCASII GAVE AN RA AND THEY DEVIATED L AND DSNDED TO AVOID THE TFC.

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.