Widebody transport takes evasive action when TCASII RA received.

Attributes
ACN	265261
Time
Date	199403
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : fll
State Reference	FL
Altitude	msl bound lower : 5900 msl bound upper : 6000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
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 airway : mia
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	other : unknown
Flight Phase	climbout : intermediate altitude
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 11000 flight time type : 5000
ASRS Report	265261
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument pilot : atp
Events
Anomaly	altitude deviation : excursion from assigned altitude non adherence : clearance other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 12000 vertical : 900
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other

Narrative:

Level at 6000 ft eastbound on arrival to fll under control of approach control. Excellent visibility. Approach pointed out small jet at 1 O'clock climbing through our altitude. Acquired him visually, and as it closed TCASII showed approximately 800 ft vertical separation. I guess he got inside our 'bubble' with less than 1000 ft separation. Because TCASII gave an RA to descend. Advised approach and started down. After losing only 100 ft (to 5900 ft) RA ceased. Advised approach that we only had descended to 5900 ft and climbed back to assigned altitude of 6000 ft MSL. Too many TCASII advisories when there is no real danger of collision. Ought to be fixed because of danger of crying wolf too often.

Original NASA ASRS Text

Title: WDB TAKES EVASIVE ACTION WHEN TCASII RA RECEIVED.

Narrative: LEVEL AT 6000 FT EBOUND ON ARR TO FLL UNDER CTL OF APCH CTL. EXCELLENT VISIBILITY. APCH POINTED OUT SMALL JET AT 1 O'CLOCK CLBING THROUGH OUR ALT. ACQUIRED HIM VISUALLY, AND AS IT CLOSED TCASII SHOWED APPROX 800 FT VERT SEPARATION. I GUESS HE GOT INSIDE OUR 'BUBBLE' WITH LESS THAN 1000 FT SEPARATION. BECAUSE TCASII GAVE AN RA TO DSND. ADVISED APCH AND STARTED DOWN. AFTER LOSING ONLY 100 FT (TO 5900 FT) RA CEASED. ADVISED APCH THAT WE ONLY HAD DSNDED TO 5900 FT AND CLBED BACK TO ASSIGNED ALT OF 6000 FT MSL. TOO MANY TCASII ADVISORIES WHEN THERE IS NO REAL DANGER OF COLLISION. OUGHT TO BE FIXED BECAUSE OF DANGER OF CRYING WOLF TOO OFTEN.

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.