<< >> NASA ASRS Report 586432, June 2003

ZLA controller reports B737-300 flight crew initiating a TCASII maneuver over trm, ca, at FL250. No observed primary or secondary target, but advises that conflict alert activated.

Attributes
ACN	586432
Time
Date	200306
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	navaid : trm.vortac
State Reference	CA
Altitude	msl single value : 25000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zla.artcc
Operator	common carrier : air carrier
Make Model Name	B737-300
Operating Under FAR Part	Part 121
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller military : 4 controller radar : 23 controller time certified in position1 : 21
ASRS Report	586432
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	altitude deviation : excursion from assigned altitude conflict : airborne critical other anomaly other
Independent Detector	atc equipment : conflict alert aircraft equipment : tcas other flight crewa
Resolutory Action	flight crew : took evasive action
Supplementary
Problem Areas	Aircraft Navigational Facility
Primary Problem	Navigational Facility
Situations
ATC Facility	computer equipment : zla.artcc radar equipment : zla.artcc

Narrative:

Aircraft level at FL250 said he was getting a TCASII descent RA. There was no observed target, either primary or secondary.

Related reports:

• Radar controller at dab claims when the patrick (cof) radar ...
• Sct TRACON controller reported losing the data tag; secondar...
• Controller reported secondary radar failed when maintenance ...
• Tmb controller reports loss of primary and secondary radar t...
• Controller stated there was a loss of secondary radar and al...
• Approach controller claims that a new building near the ASR ...

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

Original NASA ASRS Text

Title: ZLA CTLR RPTS B737-300 FLT CREW INITIATING A TCASII MANEUVER OVER TRM, CA, AT FL250. NO OBSERVED PRIMARY OR SECONDARY TARGET, BUT ADVISES THAT CONFLICT ALERT ACTIVATED.

Narrative: ACFT LEVEL AT FL250 SAID HE WAS GETTING A TCASII DSCNT RA. THERE WAS NO OBSERVED TARGET, EITHER PRIMARY OR SECONDARY.

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.