‘Warning alarms were screaming’

Santoso Sayogo, an investigator from Indonesias National Transportation Safety Committee, talks to the WSJ's Deborah Kan about what the flight-data recorder and cockpit-voice recorder can tell us about what went wrong on AirAsia Flight 8501.

Parts of AirAsia Flight 8501 ... on the deck of rescue ship Crest Onyx at Kumai port in Pangkalan Bun, Indonesia. Picture: AP Source: AP

WARNING alarms on AirAsia flight QZ8501 were "screaming" as the pilots desperately tried to stabilise the plane just before it plunged into the Java Sea.

The noise of several alarms - including one that indicated the plane was stalling - can be heard going off in recordings from the black box in the Airbus A320-200's cockpit, a crash investigator told AFP, requesting anonymity.

"The warning alarms, we can say, were screaming, while in the background they (the pilot and copilot) were busy trying to recover," the investigator said, adding the warnings were going off "for some time".

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More clues ... the Cockpit Voice Recorder from the ill-fated AirAsia Flight 8501. Picture: AP Source: AP

The investigator, from Indonesia's National Transportation Safety Committee, added that the pilots' voices were drowned out by the sound of the alarms.

The revelation came a day after Indonesian Transport Minister Ignasius Jonan said the plane had climbed abnormally fast before stalling and plunging into the sea, during a flight on December 28 in stormy weather from Indonesia's Surabaya to Singapore.

"In the final minutes, the plane climbed at a speed which was beyond normal," the minister told reporters.

Military personnel ... hold a black box of the ill-fated AirAsia plane that crashed in the Java Sea. Picture: AP Source: AP

The plane crashed in shallow waters with 162 people on board, but so far just 53 bodies have been recovered.

Divers have been struggling for a week against rough seas and strong currents to reach the plane's main body, which was spotted on the seabed and is thought to contain the bulk of the remaining passengers and crew.

The two black boxes - the cockpit voice recorder and the flight data recorder - were recovered last week after a lengthy search, and investigators are expected to complete a preliminary report next week.

Under analysis .. Indonesian air force personnel carry the flight data recorder. Picture: AP Source: AP

As well as the cockpit voice recorder, the NTSC is examining a wealth of information in the flight data recorder, which monitors every major part of the plane.

They are focusing on the possibility of human or aircraft error, after ruling out terrorism following an analysis of the cockpit voice recorder.

Recovering the aircraft ... a portion of the tail of AirAsia Flight 8501 is seen on the deck of a rescue ship after it was recovered from the sea floor. Picture: AP Source: AP

Committee head Tatang Kurniadi said the preliminary report into the crash would be completed on Tuesday, a month after the accident. He said the full report would not be released publicly, but the media would be told some of its contents.

There was a huge international hunt for the crashed plane, involving ships from several countries including the US and China. All but seven of those on board the flight were Indonesian. The foreign nationals were from South Korea, Singapore, Malaysia, Britain and France.

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