Air carrier Y climb to occupied altitude and had less than standard separation from air carrier X. System error. Air carrier X TCASII TA RA evasive action taken climb.

Home

Browse by month

Random

Latest

About

Contact

Attributes
ACN	219300
Time
Date	199208
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : lbv
State Reference	FL
Altitude	msl bound lower : 23000 msl bound upper : 23000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zma
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
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	Heavy Transport, Low Wing, 4 Turbojet Eng
Flight Phase	climbout : intermediate altitude
Route In Use	enroute : direct
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 180 flight time total : 13000 flight time type : 4000
ASRS Report	219300
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	conflict : airborne less severe non adherence : published procedure non adherence : required legal separation
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : took evasive action
Consequence	faa : investigated faa : reviewed incident with flight crew
Miss Distance	horizontal : 0 vertical : 900
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Air carrier X was level at 23000 assigned heading 270 degrees. We got a TA immediately followed by a RA to climb at approximately 1800 FPM. We immediately began to climb and advised ZMA we were climbing following a RA, mia told us to maintain 23000. They had no traffic. We ignored ZMA instructions and followed our TCASII commands. I spotted the traffic, an air carrier Y climbing up towards us from our left rear, air carrier Y passed directly below us still climbing up towards us as we climbed up away from the traffic. ATC then realized their error and climbed us to 26000 ft and admitted that air carrier Y was also now level at 23000, and had been cleared to that altitude. TCASII saved us from a possible midair collision due to controller error. TCASII is great, I know many controllers don't like it, but from a pilot's viewpoint, it is one of the most valuable pieces of equipment on the aircraft.

Original NASA ASRS Text

Title: ACR Y CLB TO OCCUPIED ALT AND HAD LTSS FROM ACR X. SYS ERROR. ACR X TCASII TA RA EVASIVE ACTION TAKEN CLB.

Narrative: ACR X WAS LEVEL AT 23000 ASSIGNED HDG 270 DEGS. WE GOT A TA IMMEDIATELY FOLLOWED BY A RA TO CLB AT APPROX 1800 FPM. WE IMMEDIATELY BEGAN TO CLB AND ADVISED ZMA WE WERE CLBING FOLLOWING A RA, MIA TOLD US TO MAINTAIN 23000. THEY HAD NO TFC. WE IGNORED ZMA INSTRUCTIONS AND FOLLOWED OUR TCASII COMMANDS. I SPOTTED THE TFC, AN ACR Y CLBING UP TOWARDS US FROM OUR L REAR, ACR Y PASSED DIRECTLY BELOW US STILL CLBING UP TOWARDS US AS WE CLBED UP AWAY FROM THE TFC. ATC THEN REALIZED THEIR ERROR AND CLBED US TO 26000 FT AND ADMITTED THAT ACR Y WAS ALSO NOW LEVEL AT 23000, AND HAD BEEN CLRED TO THAT ALT. TCASII SAVED US FROM A POSSIBLE MIDAIR COLLISION DUE TO CTLR ERROR. TCASII IS GREAT, I KNOW MANY CTLRS DON'T LIKE IT, BUT FROM A PLT'S VIEWPOINT, IT IS ONE OF THE MOST VALUABLE PIECES OF EQUIP ON THE ACFT.

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.