<< >> NASA ASRS Report 282566, September 1994

TCASII RA.

Attributes
ACN	282566
Time
Date	199409
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : sea
State Reference	WA
Altitude	msl bound lower : 13000 msl bound upper : 13500
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zse tower : sea
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Aircraft 2
Operator	general aviation : corporate
Make Model Name	Twin Otter DHC-6-300
Operating Under FAR Part	Part 91
Flight Phase	cruise other
Flight Plan	VFR
Person 1
Affiliation	Other
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 160 flight time total : 10000 flight time type : 1700
ASRS Report	282566
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 40 flight time total : 11125 flight time type : 4000
ASRS Report	282468
Events
Anomaly	altitude deviation : overshoot conflict : airborne less severe non adherence : clearance non adherence : far non adherence : required legal separation other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : took evasive action flight crew : returned to intended course or assigned course
Consequence	Other
Miss Distance	horizontal : 10000 vertical : 300
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

On climb out sea departure told us to expedite through 12000 ft for a twin otter. As we climbed through 12000 ft they said 'thank you for the help' contact sea center. As we changed frequencys I got a traffic resolution on the TCASII -- usi. The traffic was 300 ft below and climbing. We then got an aural 'descend' the captain noted the green band in the descend arc. I eased off yoke pressure and immediately got 'climb now' with the green band up at 6000 FPM. I initiated an aggression climb. The captain queried ATC about the traffic and center said departure 'dropped the ball,' but they would look into it.

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Original NASA ASRS Text

Title: TCASII RA.

Narrative: ON CLBOUT SEA DEP TOLD US TO EXPEDITE THROUGH 12000 FT FOR A TWIN OTTER. AS WE CLBED THROUGH 12000 FT THEY SAID 'THANK YOU FOR THE HELP' CONTACT SEA CTR. AS WE CHANGED FREQS I GOT A TFC RESOLUTION ON THE TCASII -- USI. THE TFC WAS 300 FT BELOW AND CLBING. WE THEN GOT AN AURAL 'DSND' THE CAPT NOTED THE GREEN BAND IN THE DSND ARC. I EASED OFF YOKE PRESSURE AND IMMEDIATELY GOT 'CLB NOW' WITH THE GREEN BAND UP AT 6000 FPM. I INITIATED AN AGGRESSION CLB. THE CAPT QUERIED ATC ABOUT THE TFC AND CTR SAID DEP 'DROPPED THE BALL,' BUT THEY WOULD LOOK INTO IT.

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.