Divers
 found the flight data recorder under the wreckage of one of the plane's
 wings, said Bambang Soelistyo, the head of Indonesia's search and 
rescue agency. 
The search teams have 
also located but not yet recovered the other key source of information 
about the plane, the cockpit voice recorder, said Mardjono Siswosuwarno,
 the chief investigator into the crash. 
The voice recorder is underneath debris, he said, expressing hope that it could be retrieved easily.
The
 two devices, known popularly as black boxes, are seen as crucial to 
unraveling the mystery of what brought down Flight QZ8501 as it flew 
toward Singapore from the Indonesian city of Surabaya with 162 people on
 board.
Finding
 the data recorder is "a huge step in the right direction for 
investigators," said CNN aviation correspondent Rene Marsh. "It gives 
them so much information that they didn't have before."
Coupled with the debris that's already 
been collected, the data recorder will enable investigators to "begin to
 paint the picture of exactly what happened when things went terribly 
wrong for this aircraft," Marsh said.
Recorder's location 'is a clue'
The
 data recorder is expected to provide a vast range of information about 
what the plane was doing, including its air speed, engine performance 
and the cabin pressure.
 The discovery 
of the device under the wreckage of a wing is significant, according to 
Mary Schiavo, a former inspector general of the U.S. Department of 
Transportation.
"That itself is a clue,
 because I think that pretty much indicates that the plane broke apart 
when it hit the water," she said, adding that if the aircraft had broken
 up at a high altitude, investigators wouldn't "have found the wreckage 
that close together."
The cockpit voice
 recorder is expected to give insight into how the pilots responded to 
the crisis that brought down the plane. It captures all sounds on the 
flight deck, notably conversations between the crew members.
The
 condition of the black boxes wasn't immediately clear, but Marsh said 
they were likely to have come through the crash with their information 
intact.
"They are built to withstand 
the most severe aircraft accidents," Marsh said. "We're talking about 
high temperatures, we're talking about pressure from being at the depths
 of the ocean."
Reams of data
The flight data recorder is expected to be taken to a lab in Jakarta, the Indonesian capital, for analysis. 
Once
 the information is downloaded, investigators should have "a pretty good
 idea within a couple of days" of what happened aboard the plane, 
Schiavo said.
The devices usually 
contain hundreds of parameters and thousands of data points, she said, 
that look a bit like an EKG when they're printed out.
But Schivao added that she didn't think officials would release any information publicly for a couple of weeks.
French
 aviation experts are helping the Indonesian investigation, which also 
expected to involve Airbus, the manufacturer of the downed plane, an 
A320-200.
The tail section of the 
aircraft, which houses the black boxes, was lifted from the Java Sea on 
Saturday. But searchers didn't find the flight recorders inside it.
The
 flight data recorder was found about 2.5 kilometers (1.5 miles) from 
the location of the tail, according to Soelistyo, the head of the search
 agency.
Most bodies still missing
Searchers are still looking for the plane's fuselage, where many of the bodies of those on board the plane might be located.
A
 total of 48 bodies have so far been recovered from the sea, some of 
them still strapped into seats. Authorities have identified most of 
them.
Eben Tanapurtra, who lost seven 
family members in the disaster, told CNN that he was happy to hear the 
flight data recorder has been found but that his family and others hope 
authorities won't focus only on the black boxes.
"Please,
 please, continue the search for the missing bodies," he said. "We 
understand that the black box is crucial and so important for 
investigation. But please, do not consider the efforts to find the 
bodies as a less important thing."
Bad 
weather has hampered the search efforts for the aircraft, which are now 
in their 16th day. Flight QZ8501, operated by AirAsia's Indonesian 
affiliate, went down on December 28.
The
 pilot had requested permission to turn and climb to a higher altitude 
minutes before contact was lost, according to Indonesian officials.
 
Grim discovery: After 3 days of intense search for AirAsia Flight QZ8501, debris and dead bodies 
 
CNN) -- [Breaking news update 6:16 a.m. ET]
So far, two bodies have 
been sighted, Indonesian Navy Official Manahan Simorangkir told CNN. The
 body of a woman has been recovered, but large waves have prevented 
crews from getting to the second body.
[Breaking news update 6 a.m. ET]
Hospitals in the 
Indonesian city of Surabaya are being prepared to help house and 
identify bodies being recovered off the coast of Borneo from a site 
where Indonesian officials think they've found debris from AirAsia 
Flight QZ8501, a search team official said.
After three days of 
intense searching for AirAsia Flight QZ8501, Indonesian teams made the 
grim discovery Tuesday: debris and dead bodies in the waters off the 
island of Borneo.
The crew on a military 
aircraft spotted the shadow of an object that looked like a plane in the
 water, said Bambang Sulistyo, the head of Indonesia's search and rescue
 agency.
Further searching 
located floating objects believed to be the bodies of passengers, and 
then what appeared to be an emergency exit of the plane, Sulistyo told a
 news conference.
Officials sent other search teams racing to the area.
So far, two bodies have 
been sighted, Indonesian Navy Official Manahan Simorangkir told CNN. The
 body of a woman has been recovered, but large waves prevented crews 
from getting to the second body.
Hospitals in the city of Surabaya were being prepared to help house and identify them.
The news dealt a 
heartbreaking blow to relatives of passengers who had been waiting 
anxiously for information at the airport in Surabaya, the Indonesian 
city where Flight 8501 began its journey Sunday with 162 people on 
board.
The plane was carrying 
155 passengers and 7 crew members. The overwhelming majority of those on
 board were Indonesians. There were also citizens of Britain, France, 
Malaysia, Singapore and South Korea.
There were scenes of 
anguish as families watched a live news conference about the discovery 
of the debris and saw video of a helicopter lowering a diver down to 
what appeared to be a floating body.
Some people fainted and stretchers were taken into the room.
Family members burst 
into tears, dabbing their eyes as officials passed out tissues. Some sat
 with their eyes full of tears, hands covering their mouths, or heads 
buried in their hands. Others had phones jammed against their ears.
'Words cannot express how sorry I am'
"My heart is filled with
 sadness for all the families involved in QZ 8501," AirAsia CEO Tony 
Fernandes tweeted. "On behalf of AirAsia my condolences to all. Words 
cannot express how sorry I am."
He said he was on his way to Surabaya.
Search and rescue teams 
are diverting all their resources to where the debris is located, 
authorities said. The area is about 10 kilometers (6 miles) from the 
aircraft's last known location over the Java Sea, off the coast of 
Indonesia's Central Kalimantan province on Borneo.
Divers and ships with 
sonar equipment are being sent to the site, where the depth of the sea 
at the site varies between 25 and 30 meters, Sulistyo said.
Ships, planes and helicopters have been scouring the sea for Flight 8501 since it went missing on its way to Singapore. 
The Airbus A320-200 lost
 contact with air traffic control early Sunday shortly after the pilot 
requested permission to turn and climb to a higher altitude because of 
bad weather, according to Indonesian officials.
Unanswered questions
Authorities mounted a huge effort to find the aircraft, mapping out a search zone covering 156,000 square kilometers.
Questions remain unanswered about why Flight 8501 lost contact with air traffic control and what happened afterward.
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.
The key to understanding what happened is likely to be contained in the aircraft's flight recorders.
"Until we get the black 
boxes, we won't know what's going on with the engines," Bill Savage, a 
former pilot with 30 years of experience, told CNN.
'It was to be his last vacation with his family'
Details have emerged about some of the people on board the plane. 
They include Alain 
Oktavianus Siauw, whose fiance says she was on her way to the airport to
 pick him up when she heard the plane had gone missing.
Louise Sidharta said 
Siauw was supposed to be enjoying a family vacation before the two got 
married. "It was to be his last vacation with his family," she said.
Siauw's Facebook page says he lives in Malang, a province in Indonesia.
The disappearance of Flight 8501 also stirred painful memories of the families of people on board Malaysia Airlines Flight 370, which dropped off radar over the South China Sea in March. 
Nearly 10 months later, 
searchers are still combing remote reaches of the southern Indian Ocean 
for any trace of the Boeing 777 that had 239 people on board.
"The lack of ability to 
close things down emotionally is just exhausting," said Sarah Bajc told 
CNN on Monday night. Her partner, Philip Woods, was on board Flight 370.
When news broke that another plane had disappeared this week, Bajc said, "I just started to shake."
Official: AirAsia Flight QZ8501 likely at 'bottom of the sea'
(CNN) -- The missing AirAsia jet probably crashed 
into the sea, Indonesia's top rescue official said Monday, citing radar 
data from the plane's last contact.
"Our early conjecture is 
that the plane is in the bottom of the sea," Bambang Sulistyo, head of 
Indonesia's national search and rescue agency, told reporters, saying 
the view was based on the plane's flight track and last known 
coordinates.
But searchers still don't
 know exactly where the aircraft is, he said, and may need help from 
other countries for an underwater search.
The search for AirAsia 
Flight QZ8501 resumed on Monday, a day after the commercial jet 
disappeared in Indonesian airspace with 162 people aboard.
Ships, planes and 
helicopters are looking for the missing aircraft, according to 
Indonesian authorities, who are leading the search and rescue 
operations.
It's unclear if weather 
played a role in the aircraft's disappearance, but rescuers say it could
 be a factor that influences how quickly they find the plane.
Large waves and clouds 
hampered the search for the plane on Sunday, the agency said. By Monday 
morning, weather in the area appeared to be clearing up, CNN 
International meteorologist Tom Sater said.
Authorities say they're combing a "very broad search area."
Report: Higher altitude request denied
AirAsia says air traffic controllers lost contact with the aircraft at 7:24 a.m. Sunday Singapore time (6:24 a.m. in Indonesia).
The plane, flying from 
the Indonesian city of Surabaya to Singapore, went missing as it flew 
over the Java Sea between the islands of Belitung and Borneo -- a 
heavily traveled shipping channel with shallow waters -- Indonesian 
authorities said.
Before the plane, an Airbus A320-200,
 lost contact with air traffic controllers, one of the pilots asked to 
change course and fly at a higher altitude because of bad weather, 
officials said. Heavy thunderstorms were reported in the area at the 
time. 
Air traffic control 
approved the pilot's request to turn left but denied permission for the 
plane to climb to 38,000 feet from 32,000 feet, Djoko Murjatmodjo, an 
aviation official at the Indonesian Transport Ministry told the national
 newspaper Kompas.
The increased altitude request was denied because there was another plane flying at that height, he said.
In addition to Indonesia's teams, several other countries have joined the hunt for the missing plane.
A C-130 plane from 
Singapore has been participating in the search, and the country's 
military says it's sending two more ships to the search area. Malaysia's
 transportation minister said his country has deployed three vessels and
 three aircraft to assist in the search. And the Royal Australian Air 
Force said Monday that it was deploying a patrol plane to help.
The U.S. Navy Seventh Fleet said it stands ready to assist the search efforts but so far hasn't been asked to help.
Indonesia has reached 
out to the United Kingdom, France and the United States for help with 
sonar technology that may be needed for an underwater search, Sulistyo 
told reporters Monday.
Anxious wait for relatives
After hours of waiting 
in anguish for any word about the passengers aboard the missing plane, 
several dozen of their family members met with airport and airline 
officials in a closed-door briefing Monday at the airport in Surabaya.
As they waited for news,
 some relatives took cell phone pictures of a flight manifest posted on a
 wall. The black-and-white papers showed every passenger's name and seat
 number, but not their fate. 
Others simply sat and dabbed tears from their eyes.
Oei Endang Sulsilowati and her daughter were looking for information about her brother, his wife and their two children.
"We don't know what to do," Sulsilowati said. "We are just waiting for news."
"Our concern right now 
is for the relatives and the next of kin," AirAsia CEO Tony Fernandes 
said during a news conference in Surabaya.
Fernandes confirmed that
 storm clouds caused the pilot to ask for a change in flight plan, but 
added, "We don't want to speculate whether weather was a factor. We 
really don't know." Once the aircraft is found, there will be a proper 
investigation, he said.
Of the people on board 
the passenger jet, 155 are Indonesian, three are South Korean, one is 
British, one is French, one is Malaysian and one is Singaporean, the 
airline said.
Eighteen children, 
including one infant, are among the passengers, the carrier said. Seven 
of the people on board are crew members.
The MH370 mystery
AirAsia, a successful budget airline group headquartered in Malaysia,
 had a clean safety record until the disappearance of Flight 8501. The 
missing plane is operated by the company's Indonesian affiliate. 
The loss of contact with
 the plane comes nearly 10 months after the disappearance of Malaysia 
Airlines Flight 370, which dropped off radar over Southeast Asia on 
March 8 with 239 people on board.
Searchers have yet to 
find any remains of Flight 370, which officials believe went down in the
 southern Indian Ocean after mysteriously flying thousands of kilometers
 away from its planned route from Kuala Lumpur to Beijing.
But some aviation experts don't think the search for Flight 8501 will be as challenging as the hunt for MH370. 
"We are not talking 
about the deep Indian Ocean here," CNN aviation correspondent Richard 
Quest said. "We are talking about congested airspace around Southeast 
Asia. There will be much better radar coverage. There's certainly better
 air traffic control coverage."   
AirAsia Flight QZ 8501 with 162 on board goes missing on way to Singapore
 Relatives of the passengers of AirAsia Flight
 QZ8501 comforted each other at Juanda International Airport in 
Surabaya, Indonesia, on Sunday.
  Relatives of the passengers of AirAsia Flight
 QZ8501 comforted each other at Juanda International Airport in 
Surabaya, Indonesia, on Sunday.
 
(CNN) -- The search is on for an AirAsia passenger 
jet carrying 162 people that lost contact with Indonesian air traffic 
control early Sunday, gripping Southeast Asia with a second missing 
plane crisis in less than a year.
 
 
Before communication was 
lost, a pilot on AirAsia Flight QZ 8501 asked to deviate from its 
planned route -- from the Indonesian city of Surabaya to Singapore -- 
because of bad weather, officials said.
The aircraft went missing
 as it flew over the Java Sea between the islands of Belitung and 
Borneo, according to Indonesian authorities, who are leading the search 
and rescue operations.
Of the people on board 
the Airbus A320-200, 155 are Indonesian, three are South Korean, one is 
British, one is French, one is Malaysian and one is Singaporean, the 
airline said.
Seventeen children, 
including one infant, are among the passengers, the carrier said. Seven 
of the people on board are crew members.
At the airport in Surabaya, loved ones gathered and wept as they waited for any word on the passengers.
Some took cell phone 
pictures of a flight manifest posted on a wall. The black-and-white 
papers showed every passenger's name and seat number, but not their 
fate.
Others simply sat and dabbed tears from their eyes.
"Thank you for all your 
thoughts and prayers. We must stay strong," AirAsia Chief Executive Tony
 Fernandes said on Twitter. He later announced he was traveling to 
Surabaya, saying most of the passengers are from there.
As word spread of the 
missing plane, the airline changed the color of its logo on its website 
and social media accounts from red to gray.
Heavy thunderstorms in area
Flight 8501 "was 
requesting deviation due to en route weather before communication with 
the aircraft was lost," the airline said.
The flight's captain 
asked permission to climb to a higher altitude, said Djoko Murdjatmojo, 
the head of aviation at the Indonesian Transportation Ministry, 
according to the national news agency.
According to flight tracking websites, almost the entire flight path of the plane was over the sea.
Bad weather gripped the region at the time, CNN meteorologist Derek Van Dam said.
"We still had lines of 
very heavy thunderstorms" when the plane was flying, Van Dam said. "But 
keep in mind, turbulence doesn't necessarily bring down airplanes."
CNN aviation analyst 
Mary Schiavo said that if there was an onboard emergency, the pilots 
should have issued a mayday call or a pan-pan call.
"Mayday means you're 
immediately in danger of losing the flight; pan-pan means that it is 
urgent but that you can continue the flight and request an alternate 
route or an alternate airport," said Schiavo, a former inspector general
 for the U.S. Department of Transportation.
"It's disconcerting in that the standard procedures for an emergency don't seem to have been deployed," she said.
The bad weather in the 
area is also likely to hamper the search efforts for the aircraft, said 
Alan Diehl, a former U.S. air accident investigator.
The Malaysian government
 said it has deployed three vessels and three aircraft to help 
Indonesian authorities in the search for the plane. Singapore said it 
has activated its rescue and aviation agencies. Australia said it had 
also offered assistance.
There was conflicting 
information about when exactly Flight 8501 went missing. AirAsia said 
contact was lost at 7:24 a.m. Sunday, Surabaya time (7:24 p.m. Saturday 
ET), but Indonesian aviation authorities said it happened earlier, at 
6:17 a.m.
'Very good' safety reputation
AirAsia is a 
Malaysia-based airline that is popular in the region as a budget 
carrier. It has about 100 destinations, with affiliate companies in 
several Asian countries.
The missing plane is 
operated by AirAsia's Indonesian affiliate, in which the Malaysian 
company holds a 48.9% stake, according to its website.
AirAsia has a "very good" reputation for safety, CNN aviation correspondent Richard Quest said.
Flight 8501's captain 
has a total of 6,100 flying hours, and the first officer a total of 
2,275 flying hours, the airline said. The plane's last scheduled 
maintenance was on November 16, it said.
The French Foreign 
Ministry said the first officer is the French citizen who is on the 
plane. A state-run company in Indonesia that manages airports identified
 the first officer as Remi Emmanuel Plesel.
Airbus said the plane 
had "accumulated approximately 23,000 flight hours in some 13,600 
flights." The aircraft manufacturer said it would provide full 
assistance to authorities in charge of investigating the missing plane.
The loss of contact with
 the AirAsia plane comes nearly 10 months after the disappearance of 
Malaysia Airlines Flight 370, which dropped off radar over Southeast 
Asia on March 8 with 239 people on board.
The Malaysia Airlines 
plane, a Boeing 777-200ER, lost contact with air traffic control over 
the South China Sea between Malaysia and Vietnam.
Searchers have yet to 
find any debris from Flight 370, which officials believe crashed in the 
southern Indian Ocean after veering dramatically off course.
U.S. President Barack 
Obama has been briefed about the missing AirAsia plane, White House 
spokesman Eric Schultz said, adding that U.S. officials will continue to
 monitor the situation.
CNN's Holly Yan, Yousuf Basil, Steve Almasy,
 Radina Gigova, Paula Hancocks, Joe Sutton, Euan McKirdy and Larry 
Register contributed to this report. Journalist Chan Kok Leong also 
contributed to this report.
