NI/02 Décimo Novena Reunión del Grupo de Trabajo de ... · Décimo Novena Reunión del Grupo de...

Décimo Novena Reunión del Grupo de Trabajo de Escrutinio del Grupo Regional de Planificación y Ejecución CAR/SAM GREPECAS (GTE/19)

Occurrence in the Havana FIR of several LHD events, caused by anti-collision system failures (TCAS).

Presented by:

Lic. Adriana de los Ángeles Tenorio Mazola – PoC LHD ECNA

[email protected]

NI/02

Case No. 1: December 29, 2018.Aircraft involved:


Dassault Falcon 900

Boeing 737/800 NG

NI/02

Décimo Novena Reunión del Grupo de Trabajo de Escrutinio del Grupo Regional de Planificación y Ejecución CAR/SAM GREPECAS (GTE/19)NI/02

Both aircraft converging andvertically separated, seeassigned fligth levels (FL350and FL360).

Crew of the F900 acknoledgedtwice the correct assigned FL350. No significant weatherreported.


30 seconds to cross, verticallyseparated (2700 feet).


F900 Mode S and B738 ADS-Binformation obtained fromMLAT, see F900 receivingTCAS RA (DESCENT) whencrossing 34550 feet.


F900 passing FL350, stillshowing TCAS RA DESCENT.


F900 225 feet above assignedfligth level, rapidly increasesrate of climb, second aircraftreacts immediately to TCAS RA(CLIMB), leaving 36025 feet.

F900 alerted by ATC, crewreplay “TCAS RA”. Secondaircraft also stated “TCAS RA”.


F900 reaching FL360, 1000feet above assigned altitude,second aircraft only 450 feetabove, both aircraft almostcrossing.


Both aircraft passing by, only525 feet of vertical separation.

Case No. 2 : April 23, 2019.


Airbus 319/100.

Cessna 501 Citation 1 SP.

NI/02


Both aircraft on the same routeon opposite direction,separated vertically (1000 feet)by assigned cruise flight levels.No significant weatherreported.


Suddenly the C501 climbs andturned to the rigth .


ATC issues an alert to theC501, pilot replay “TCAS RA”.Second aircraft begins climb.


Both aircraft climbing.


Already crossed, both aircraftclimbed 700 and 800 feet eachother.

Case No. 3 : 2019.


Boeing 737/800 NG

NI/02


See involved aircraft flying adirect track. Closest aircraftdescending on the transitionfrom route to approach, 18400feet below and 45 nauticalmiles away. No significantweather reported.


Crew reported “TCAS RA” andstart a violent climb. ATCadvice that there wasn´t anyreported conflicting traffic andoffers traffic information aboutthe descending aircraft.

Nevertheless crew continuesthe climb.


ADS-B information, see theTCAS advice.


Crew stopped at 39700 feetand immediately descendedback to assigned fligth level.


Identification of common issues for the first two events.

Both events involved the operation of general aviation aircraft, together with scheduled airline aircraft.

In both events, the proximity of the aircraft involved, as well as the rate of climb that both generalaviation aircraft performed above the level authorized by the ATC, prevented it from having time toapply any control action with the objective to recover the separation between both aircraft. In bothcases, almost immediately; TCAS RA notification was received, which states that the ATC does not issueinstructions.

Only the immediate execution of evasive maneuvers by the crews of both airline aircraft guaranteed theminimum separation and, in the first event, prevented the occurrence of a RVSM airspace collision.

NI/02


Suggested action.

The meeting is invited to take note of the informationcontained in this document.

NI/02

THANK YOU.

Adriana de los Ángeles Tenorio Mazola, PoC LHD ECNA.

[email protected]


NI/02 Décimo Novena Reunión del Grupo de Trabajo de ... · Décimo Novena Reunión del Grupo de...

Documents

Transcript of NI/02 Décimo Novena Reunión del Grupo de Trabajo de ... · Décimo Novena Reunión del Grupo de...