Flight 370 vanished from radar screens en route to Beijing from Kuala Lumpur March 8, while MH17 was shot down in Ukraine in July. The two incidents killed a combined 537 people and caused ticket bookings to plunge. No debris of MH370 has been found in what's become the world's longest search for a missing passenger jet.

Last Signal

QZ8501 lost contact with airport controllers at 7:24 a.m. Indonesian time today, the Malaysia-based carrier said in a statement. The flight started in Surabaya, Indonesia, at 5:35 a.m. local time and was due to arrive in Singapore at 8.30 a.m. There's a one hour time difference between the two countries. AirAsia, the region's biggest budget airline, said there was no information on the fate of the passengers and crew of the Airbus A320-200.

There were no immediate reports of any distress signal.

The pilot of the single-aisle jet requested to fly at a higher altitude because of clouds, Indonesia's actingAir Transport Director Djoko Murjatmodjo said in Jakarta today. The journey to Singapore usually takes about two hours.

The AirAsia aircraft was flying at 32,000 feet before it requested to go higher, Indonesian authorities said today.

There were storms along AirAsia's flight path, Accuweather.com said on its website, citing its own meteorologist Dave Samuhel. Storms are very active this time of year, Samuhel was quoted as saying, adding that December and January are the wettest period of the year in Indonesia.

The last signal from the plane was between the city of Pontianak on Borneo and the town of Tanjung Pandan on Belitung island. Indonesian authorities will focus their search around Belitung and expand that gradually, Transport Minister Ignasius Jonan said earlier.

Deviation Requested

“The aircraft was on the submitted flight plan route and was requesting deviation due to en-route weather before communication with the aircraft was lost while it was still under the control of the Indonesian AirTraffic Control,” AirAsia said in the statement.

AirAsia had no fatal crashes in its history of more than a decade of operations, according to AviationSafetyNetwork, which tracks accident data.

The plane had two pilots, four flight attendants and one engineer on board, AirAsia said. While the company is based in Sepang, Malaysia, it operates with subsidiaries and affiliates in different countries. The missing plane belonged to the Indonesian operations of the budget airline.

The captain in command had a total of 20,537 flying hours, including 6,053 hours with AirAsia Indonesia, and the first officer a total of 2,247, the airline said in a statement revising a previous press release.

Worst Nightmare

Of the 155 passengers, 138 were adults, 16 children and one an infant. The plane was carrying one Singaporean, a Malaysian, a person from France, one from the U.K., three from South Korea and 155 Indonesians, according to the latest AirAsia press release.

Airbus, the Toulouse, France-based planemaker, said it's aware of the reports about Flight 8501 and in contact with the airline.

The aircraft had its last scheduled maintenance last month, the carrier said.

Fernandes flew to Surabaya after the incident.

“This is my worst nightmare,” he tweeted earlier. “I as your group CEO will be there through these hard times. We will go through this terrible ordeal together.”

A320 Fleet

Fernandes, 50, bought AirAsia for 1 ringgit (29 cents) in December 2001 and assumed 40 million ringgit of debt, according to the airline's website. Prior to running AirAsia, Fernandes was an employee at Richard Branson's Virgin Group. The airline had two old aircraft when Fernandes took charge.

AirAsia had 171 A320s in operations at the end of September, according to a quarterly operating statistics statement on its website. The Indonesia entity operated 30 planes, the statement said. The airline has units across several Asian nations, including India and Thailand.

The single-aisle A320 is the most popular plane that Airbus makes in terms of sales numbers. The plane typically seats between 150 to 180 passengers, usually in six abreast configuration.

More than 3,600 A320s are in operation worldwide as of November, according to Airbus's website.

–With assistance from Niluksi Koswanage and Shamim Adam in Kuala Lumpur, Michael S. Arnold in Hong Kong, Rina Chandran, Sharon Chen and Linus Chua in Singapore, Jim McDonald in Tokyo, Tim Culpan in Taipei, Allen Wan in Shanghai and Rieka Rahadiana in Jakarta.

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