AirAsia QZ8501 Requested Deviation to The Left and Climb Up to 38,000 Feet

AirAsia Flight QZ8501 timeline 

23:05 UTC [23:05 DEC 27, Saturday] The plane on heading 320 degrees starts deviation to the left initially to 310 degrees, 13 minutes later the Jakarta Air Traffic Control has lost QZ8501 radar contact.

The aircraft requested permission from Soekarno-Hatta Airport's Air Traffic Control to turn left at 6:12 A.M. to avoid a storm. The request was immediately granted. The plane turned 7 nautical miles to its left flank.

The plane's pilot, then requested to take the plane higher to 38,000 feet from its flight level at 32,000 feet."

-         Pilot: QZ8501, request to higher level.

-        ATC:  Intend to what level?

The pilot stated that he intended to rise to 38,000 feet but did not explain why he wished to fly higher.

Jakarta’s air traffic control then contacted its counterpart at Changi International Airport in Singapore to coordinate the pilot's request.

"It took us around 2 to 3 minutes to communicate with Singapore. We agreed to allow the plane to increase its height but only to 34,000 feet, because at that time AirAsia flight QZ8502 was flying at 38,000 feet."

"But when we informed the pilot of the approval at 6:14 a.m., we received no reply." 

A aeronave solicitou permissão do Controle de Tráfego Aéreo no aeroporto de Soekarno-Hatra para curvar à esquerda às 23:12 [UTC] para evitar tempestade. A solicitação foi imediatamente autorizada. O avião curvou 7 milhas náuticas para sua lateral esquerda.

Piloto: QZ8501, solicita um nível mais alto.

ATC: Tem intenção de qual nível?

O piloto declarou que ele pretendia subir para 38000 pés, mas não explicou porque ele desejava voar mais alto.

O Controle de Tráfego Aéreo de Jakarta então contatou o controle de tráfego aéreo no aeroporto Changi Internacional em Singapura para coordenar a solicitação do piloto.

"Isso nos tomou de dois a 3 minutos  para nos comunicar com Singapura. Nós concordamos em permitir o avião aumentar sua altitude, mas somente para 34000 pés, porque naquela hora o AirAsia QZ8502 estava voando a 38000 pés".

"Mas quando nós informamos o piloto acerca da aprovação às 23:14 UTC, não recebemos resposta".

5.35AM (local time) [22:35 UTC, Saturday, DEC 27] - Departed Surabaya, Indonesia

6.12am - Pilot requests to change the travel height of the plane to an altitude of 38,000 feet

6.17am - AirAsia flight QZ8501 loses contact with Jakarta Air Traffic Control

6.18am - [23:18 UTC, Saturday, DEC 27] The flight disappears from radar

7.55am - Flight is declared missing

Mapa de Fusos  Horários em relação à Hora Universal Coordenada - UTC (Greenwich, Londres)