Searchers looking for more bodies and wreckage from AirAsia Flight QZ8501 continue to be hindered by tough weather conditions.
Ships, planes and
helicopters are being used to try to find victims of the disaster. Most
of the people on board the flight remain missing, and search teams are
still looking for the main wreckage of the plane.
Efforts are being
concentrated in a zone covering 1,575 square nautical miles (5,400
square kilometers) that officials believe is the "most probable area"
for where the remains of the aircraft are located.
But on Friday, waves in
the Java Sea as high as four meters (13 feet) were making it hard for
divers to carry out underwater searches.
The weather is "the
biggest obstacle," said Bambang Hermanu, chief of police in Indonesia's
Central Kalimantan province, where much of the search operation is
based.
Here's more key information about where things stand on Flight QZ8501:
The flight
What we know:
The aircraft took off early Sunday from Surabaya, Indonesia, bound for
Singapore. Roughly 35 minutes into the flight, the pilot asked air
traffic control for permission to turn left and climb to a higher
altitude to avoid bad weather. Minutes later, the plane disappeared from
air traffic control's radar.
What we don't know:
What happened on board after contact with the plane was lost. No
distress call was received. Indonesian aviation authorities have
suggested that the plane ascended despite permission being denied
because of traffic.
Some experts have
speculated that the aircraft might have experienced an aerodynamic stall
because of a lack of speed or from flying at too sharp an angle to get
enough lift. Analysts have also suggested that the pilots might not have
been getting information from onboard systems about the plane's
position, or that rain or hail from thunderstorms in the area could have
damaged the engines.
Until the main wreckage
of the plane is found, along with the flight recorders, experts have
little evidence to support their theories.
The search
What we know:
Search teams found debris and some bodies in the water Tuesday, 100 to
200 kilometers (about 60 to 120 miles) from the aircraft's last known
location over the Java Sea, Indonesia's search and rescue agency said.
Thirty bodies have so far been recovered from the sea, Indonesian
officials said Friday.
USS Sampson, the U.S.
Navy ship that is helping with the search, recovered two bodies on
Thursday, the U.S. Seventh Fleet said Friday. Indonesia is leading the
international search effort, with assistance from a range of countries
including Malaysia, Singapore and the United States.
What we don't know:
The exact location of the body of the aircraft. An Indonesian search
official told CNN on Wednesday that he thought sonar equipment had
detected wreckage from Flight 8501 at the bottom of the Java Sea. But
the country's search and rescue chief said the plane hadn't been found
yet. Bad weather has hindered the search operation.
The people on board
What we know:
The plane was carrying 155 passengers and seven crew members. The
overwhelming majority of those on board were Indonesians. There were
also citizens of Britain, France, Malaysia, Singapore and South Korea. Details are emerging about some of the people on the flight, recounted by family members and friends.
What we don't know: Which passengers and crew members' remains have been retrieved and which still remain missing in the Java Sea. Indonesian
authorities have identified four of the recovered bodies so far. The
first victim they identified, an Indonesian woman named Hayati Lutfiah
Hamid, was buried Thursday. Many family members are waiting in Surabaya for news about their loved ones.
The investigation
What we know:
The key to understanding what happened may be in the aircraft's cockpit
voice recorder and flight data recorder, commonly known as black boxes.
The black boxes, which are actually orange, are in the tail of Airbus
320-200s. If recovered, they will be taken to a lab in Jakarta,
Indonesia, to be analyzed, said Tatang Kurniadi, head of Indonesia's
National Committee for Transportation Safety. The batteries powering the
"pingers" that send acoustic signals have only about 25 days of power
left, he said.
What we don't know:
Where plane's remains might have been taken by the elements.
Investigators will need to use information gleaned from the flight
recorders but also clues from the wreckage itself.
"The more bits I can put
into my mosaic, the better my picture will be," aviation safety expert
Michael Barr said. "The better the picture, the better I can come up
with an understanding of what happened." But the conditions at sea make
that work much more difficult than on land. "In the water, you are
working with currents and winds, and so the pieces won't be where they
had the initial impact."
The plane and the pilots
What we know: The 6-year-old Airbus A320-200,
operated by AirAsia's Indonesian affiliate, had accumulated around
23,000 flight hours in about 13,600 flights, according to Airbus. The
plane's last scheduled maintenance was on November 16.
Flight 8501's veteran
captain, Irianto, 53, had 20,537 flying hours, 6,100 of them with
AirAsia on the Airbus A320, the airline said. The first officer, Remi
Emmanuel Plesel, 46, had 2,275 flying hours, a reasonable amount for his
position.
What we don't know:
Whether technical problems, human error or other issues were involved
in the crash. According to information from the Aviation Safety Network
accident database, there have been 54 incidents involving the A320.
"In the A320 family,
accidents and incidents range from fan-cowl detachment, landing gear
collapse, bird strikes, right through to hull losses through pilot
error," said Kane Ray, an analyst with the International Bureau of
Aviation, a global aviation consulting group. "Most aircraft have
teething problems, and in most cases, these are eradicated. Very rarely,
these issues cause disasters -- largely because of a culmination of
factors that lead to the event," Ray said.
