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Japan Airlines Flight 123 was a scheduled domestic Japan Airlines passenger flight from Tokyo's Haneda Airport to Osaka International Airport, Japan. On August 12, 1985, a Boeing 747SR operating this route suffered a rapid decompression twelve minutes into the flight and crashed in the area of Mount Takamagahara, Ueno, Gunma Prefecture, 100 kilometres (62 miles; 54 nautical miles) from Tokyo thirty-two minutes later. The crash site was on Osutaka Ridge, near Mount Osutaka.
Accident | |
---|---|
Date | August 12, 1985 |
Summary | In-flight structural failure due to improper repair, leading to rapid decompression and loss of control |
Site | Mount Takamagahara, Japan 36°0′5″N 138°41′38″E |
Aircraft | |
Aircraft type | Boeing 747-146SR |
Operator | Japan Airlines |
IATA flight No. | JL123 |
ICAO flight No. | JAL123 |
Call sign | JAPAN AIR 123 |
Registration | JA8119 |
Flight origin | Tokyo International Airport(HND) |
Destination | Osaka International Airport(ITM) |
Occupants | 524 |
Passengers | 509 |
Crew | 15 |
Fatalities | 520 |
Injuries | 4 |
Survivors | 4 |
Japan's Aircraft Accident Investigation Commission officially concluded that the rapid decompression was caused by a faulty repair by Boeing technicians after a tailstrike incident during a landing at Osaka Airport seven years earlier in 1978. A doubler plate on the rear bulkhead of the plane had been improperly repaired, compromising the plane's airworthiness. Cabin pressurization continued to expand and contract the improperly-repaired bulkhead until the day of the accident, when the faulty repair finally failed, causing the rapid decompression that ripped off a large portion of the tail and caused the loss of hydraulic controls to the entire plane.
The aircraft, configured with increased economy class seating, was carrying 524 people. Casualties of the crash included all 15 crew members and 505 of the 509 passengers. Some passengers survived the initial crash but subsequently died of their injuries hours later, mostly due to the Japan Self-Defense Forces' decision to wait until the next day to go to the crash site, after declining an offer from a nearby United States Air Force base to start an immediate rescue operation. It is the deadliest single-aircraft accident in aviation history.[1]
The accident aircraft was registered JA8119 and was a Boeing 747-146SR (Short Range). Its first flight was on January 28, 1974. It had more than 25,000 airframe hours and more than 18,800 cycles (one cycle equals one takeoff and landing).[1]
Nationality | Passengers | Crew | Total |
---|---|---|---|
Japan | 487 | 15 | 502 |
China | 1 | — | 1 |
West Germany | 2 | — | 2 |
Hong Kong | 4 | — | 4 |
India | 3 | — | 3 |
Italy | 2 | — | 2 |
South Korea | 3 | — | 3 |
United Kingdom | 1 | — | 1 |
United States | 6 | — | 6 |
Total[citation needed] | 509 | 15 | 524 |
At the time of the accident the aircraft was on the fifth of its six planned flights of the day.[2] There were fifteen crew members, including three cockpit crew and 12 flight attendants.
The cockpit crew consisted of the following:
The flight was around the Obon holiday period in Japan, when many Japanese people make yearly trips to their home towns or resorts.[6] Around twenty-one non-Japanese boarded the flight.[7] By August 13, 1985, Geoffrey Tudor, a spokesman for Japan Airlines, stated that the list included four residents of Hong Kong, two each from Italy and the United States, and one each from West Germany and the United Kingdom.[8] Some foreigners had dual nationalities, and some of them were residents of Japan.[6]
The four survivors, all female, were seated on the left side and toward the middle of seat rows 54–60, in the rear of the aircraft. The four survivors were:
Among the dead was singer Kyu Sakamoto, who was famous for the hit song known in the United States under the title "Sukiyaki."
This section needs expansion with: the CVR transcript (at least the important portions of it), and the events that occurred in the passenger cabin. You can help by adding to it. (January 2019) |
The aircraft landed at Haneda from New Chitose Airport at 4:50PM as JL514. After more than an hour on the ramp, Flight 123 pushed back from gate 18 at 6:04 p.m.[2] and took off from Runway 15L[2] at Haneda Airport in Ōta, Tokyo, Japan, at 6:12 p.m., twelve minutes behind schedule.[12] About 12 minutes after takeoff, at near cruising altitude over Sagami Bay, the aircraft had a rapid decompression[2]: 83 bringing down the ceiling around the rear lavatories, damaging the unpressurized fuselage aft of the plane, unseating the vertical stabilizer, and severing all four hydraulic lines. A photograph taken from the ground confirmed that the vertical stabilizer was missing.[13]
The pilots set their transponder to broadcast a distress signal. Afterwards, Captain Takahama contacted Tokyo Area Control Center to declare an emergency, and to request to return to Haneda Airport, descending and following emergency landing vectors to Oshima. Tokyo Control approved a right-hand turn to a heading of 90° east back towards Oshima, but the plane did not follow the directions and continued to fly a westerly course. It was at this point that the pilots became aware that the aircraft had become uncontrollable, and the flight engineer reported that the hydraulic pressure was dropping. Seeing that the aircraft was still flying west away from Haneda, Tokyo Control contacted the aircraft again. After confirming that the pilots were declaring an emergency, the controller requested as to the nature of the emergency, which the pilots did not respond to. Only after Tokyo Control repeated the direction to descend and turn to a 90° heading to Oshima did the Captain report that the aircraft had become uncontrollable. Heading over the Izu Peninsula, the pilots managed to turn towards the Pacific Ocean, then back towards the shore; Captain Takahama declined Tokyo Control's suggestion to divert to Nagoya Airport 72 miles away, instead preferring to land at Haneda.
Hydraulic fluid completely drained away through the rupture. With total loss of hydraulic control and non-functional control surfaces, the aircraft began up and down oscillations in phugoid cycles lasting about 90 seconds each. The lack of stabilizing influence from the vertical stabilizer and the rudder removed the only means to dampen yaw. Consequently, the aircraft also began to exhibit Dutch roll, simultaneously yawing right and banking right, before yawing back left and banking left, with the banks in large arcs of approximately 50° back and forth in cycles of 12 seconds.[10] In response, the pilots exerted efforts to establish stability using differential engine thrust, and they managed to slowly turn the plane back towards Haneda. The plane rose and fell in an altitude range of 20,000–24,000 feet (6,100–7,300 m) for 15 minutes, with the pilots seemingly unable to figure out how to descend without flight controls. This is possibly due to the effects of hypoxia at such altitudes, as the pilots seemed to have difficulty comprehending their situation as the plane pitched and rolled uncontrollably. The flight engineer did say they should put on their oxygen masks when word reached the cockpit that the rear-most passenger masks had stopped working, however, none of the pilots did put on their oxygen masks, possibly out of indecision, or hypoxia impairing their judgement. Their voices can be heard relatively clearly on the cockpit area microphone for the entire duration up until the crash which is proof that they likely did not do so at any point in the flight.[2]: 96 Eventually, the pilots discovered that they could achieve limited control of the airplane by adjusting the power of the 747's wing-mounted engines. By increasing power when the plane is descending, they can make the plane climb; by reducing power, they could make the plane descend. In doing so, they were able to dampen the phugoid cycle and somewhat stabilize their altitude. Suppressing the dutch roll was another matter, as the engines cannot respond fast enough to counter the dutch roll. According to the accident report, "Suppressing of dutch roll mode by use of the differential thrust between the right and left engines is estimated practically impossible for a pilot."[2]: 89
Shortly after 6:40 PM, the landing gear was lowered in an attempt to dampen the phugoid cycles and Dutch rolls. This was somewhat successful, as the phugoid cycles were dampened, but lowering the gear also decreased the directional control the pilots were getting by applying power to one side of the aircraft, and the aircrew's ability to control the aircraft deteriorated.[10] Shortly after lowering the gear, the plane began a right-hand descending turn from 22,400 feet (6,800 m) to 17,000 feet (5,200 m), then continued north while still descending. Upon descending to 13,500 feet (4,100 m) at 6:45 PM, the pilots again reported an uncontrollable aircraft.[2]: 324 Moments later, the aircraft began to turn to the left, despite efforts by the crew to get the plane to continue to turn right and avoid the mountains.
As the aircraft continued west, they descended below 7,000 feet (2,100 m), then entered a rapid climb and briefly stalled the plane at 8,000 feet (2,400 m), The captain immediately ordered maximum power before returning to an unsteady climb only to make it stall again. Possibly as a measure to prevent a recurrence of stalling, however, by doing that, it made the plane repeat the up and down cycles, so they slowed the plane down using engine power, but it almost made the plane stall again. Due to the lowered air speed caused by the drag of the undercarriage, the First officer quickly discussed lowering the flaps. Without hydraulics, the captain expressed that this wouldn't work, but the flight engineer pointed out this could be done via an alternate electrical system.[2]: 322 At 6:51 PM, the captain lowered the flaps 5 units as an additional attempt to exert control over the stricken jet.[2]: 291 [10] The aircraft reached 13,000 feet (4,000 m) at 6:53 PM, at which point the captain reported an uncontrollable plane for the third time. At approximately 6:54 PM, the crew lowered flaps to 10 units, but this began to cause the plane to begin to bank to the right. [2]: 291 One minute later, the flaps were extended to 25 units, which caused the aircraft to bank further to the right beyond 60°, and the nose began to drop.[2]: 292 Captain Takahama immediately ordered the flaps to be retracted ("Hey, halt the flap") [2]: 326 , and was heard on the cockpit voice recorder desperately requesting for more power to be applied in a last-ditch effort to raise the nose.[2]: 326–327 [14]The plane continued to enter an uncontrollable right-hand descent into the mountains and disappearing from radar at 6:56 p.m. at 6,800 feet (2,100 m). In the final moments, the planes fourth engine clipped a ridge of a mountain, then the plane flipped on its back and crashed and exploded on another ridge near Mount Takamagahara. [2]
The aircraft's crash point, at an elevation of 1,565 metres (5,135 ft), is located in Sector 76, State Forest, 3577 Aza Hontani, Ouaza Narahara, Ueno Village, Tano District, Gunma Prefecture. The east-west ridge is about 2.5 kilometres (8,200 ft) north north west of Mount Mikuni.[2] Ed Magnuson of Time magazine said that the area where the aircraft crashed was referred to as the "Tibet" of Gunma Prefecture.[4] The elapsed time from the bulkhead failure to the crash was 32 minutes.[2]: 123, 127 [15]
18:24:35: Sound like "bang"
18:24:37: Cabin Altitude alert begins
18:24:39: (CAP) Something exploded?
18:24:42: (CAP) Squawk 77
18:24:43: (COP) Gear door (CAP) Check gear, gear.
18:24:47:(CAP) Engine?
18:24:48:(COP) Squawk 77
18:24:49:(F/E) All engine . . .
18:24:51:(COP) Look at this.
18:24:53:(F/E) Eh
18:24:55:(F/E) All engine…
18:24:57:(COP) Shall we check hydro pressure?
18:24:59:(CAP) Something exploded.
(CAP) Right turn
(CAP) Right turn
(COP) Pressure ? (F/E) Dropped.
(CAP) Ah, Tokyo, Japan Air 123 request from immediate e-- trouble request return back to Haneda descend and maintain 220 over.
(ACC) Roger, approved as you requested.
(CAP) Radar vector to OSHIMA, please.
(ACC) Roger, uh, you want right or left turn?
(CAP) Going to right turn, over.
(ACC) Alright, right heading 090, radar vector to Oshima.
(CAP) 090
(CAP) Don’t bank so much.
(COP) Yes.
(CAP) Don’t bank so much.
(COP) Yes.
(CAP) What’s is that?
(F/E) Hydraulic pressure has dropped, hydro.
(CAP) Don’t bank so much. It’s manual.
(COP) Yes.
(CAP) Turn it back.
(COP) It doesn’t go back.
(CAP) Pull up
(CAP) Hydro is all out?
(F/E) Yes.
(ACC) Ah, 123, negative, negative, negative, call you.
(ACC) Japan Air 123, confirm you are declaring an emergency, that's right?
(123) That's affirmative.
(ACC) 123, roger. And, uh, request your nature of emergency.
(CAP) Hydro?
(F/E) Yes.
(F/E) Hydro pressure all loss.
(COP) All loss?
(CAP) No, look.
(F/E) All loss.
(COP) All loss?
(F/E) Yes.
(ACC) Japan Air 124(sic), fly heading 090, radar vector to Oshima.
(123) But now uncontrol.
(ACC) Uncontrol, roger, understood.
(ACC) Japan Air 123, uh, can you descend?
(CAP) Ah, roger, now descending.
(ACC) Ok, say altitude now.
(123) 240.
(ACC) Alright, your position, 72 miles to Nagoya. Uh, can you land to Nagoya?
(123) Ah, negative, uh. Request back to Haneda.
(ACC) Alright, uh, (in Japanese from this point forward) You may speak in Japanese from now on.
(123) Yes, yes.
(F/E) Captain.
(CAP) Yes.
(F/E) The R5 masks have stopped, I think we'd better make an emergency descent.
(CAP) Yes.
(F/E) Shall we use our masks too?
(CAP) Yes. (COP) We'd better.
(F/E) If possible, I think it’d better to use oxygen masks.
(CAP) Yes
(F/E) Gear down, how about gear down?
(COP) Shall we gear down?
(CAP) Doesn't work. Gear won't go down.
(F/E) Shall I lower it slowly by alternate?
(CAP) Yes, wait a moment.
(F/E) I have lowered the gear.
(COP) Yes.
(ACC) Japan Air 123, Japan Air 123, can you switch to frequency 134.0?
Japan Air 123, Japan Air 123, Tokyo Control, if you read me ident, please.
(CAP) Lower the nose. Never mind that. You'll stall.
(COP) Yes.
(ACC) All station, all station, except Japan Air 123, contact Tokyo Control, contact Tokyo Control, 134.0, change frequency 134.0, and keep silent until further notice.
(CAP) Heavy. More, lower the nose a little more.
(COP) Yes.
(CAP) We're going down.
(CAP) Heavy.
(CAP) Is the wheel pushed all the way?
(COP) All the way, it's all the way.
(CAP) Ah, heavy.
(F/E) How about the flap? Shall we extend it?
(CAP) It's still too early.
(F/E) It's still to early?
(CAP) It's still too early.
(COP) Are the gears down?
(F/E) Gears are down.
(Yokota AFB) Japan Air One Twenty Three, Japan Air One Twenty Three, Yokota Approach on guard, if you hear me, attempt contact 129.4.
(123) Japan Air 123 uncontrollable
(ACC) Japan Air 123, go ahead.
(ACC) Japan Air 123 roger understood, understood, and uh.
(ACC) Japan Air 123, do you wish to contact Haneda?
(123) Stay with us please.
(ACC) Do you wish to contact?
(123) Stay with us please.
(ACC) Yes, understood, standby, please wait.
(CAP) This may be hopeless.
(CAP) Ah, request radar vector to Haneda ah Kisarazu1
.
(ACC) Roger, understood. As the runway 22, keep heading 090.
(CAP) Roger.
(F/E) The hydraulic quantity is all lost.
(ACC) Can you control the aircraft now?
(123) It's uncontrollable.
(ACC) Roger.
Cabin Altitude alert stops
(CAP) Hey, mountain... Turn right. Mountain!
(COP) Yes.
(CAP) Take control, right! Right turn!
(COP) Right turn?
(CAP) We'll hit a mountain! (COP) Yes.
(CAP) Right turn.
Cabin Altitude alert begins again.
(CAP) Max power.
(COP) Max power.
Cabin Altitude alert stops.
(CAP) We'll go into the mountains. (COP) Yes.
(COP) Shall I increase power?
(CAP) Power, power.
Cabin Altitude alert begins again.
Selective calling system begins ringing, until 18:53:00.
18:49:35: Stick shaker begins vibrating
18:49:39: (CAP) Ah, not good.
Stall! Max power! Max power! Max power!
Stall. Altitude has dropped.
(COP) We're gaining speed, speed.
(CAP) Let's give it a try.
(CAP) Stick with it. (COP) Yes.
(CAP) Lower the nose. Stick with it, stick with it.)
(COP) Now, I've fully pushed the control.
(F/E) Max Power.
(COP) We're losing speed, speed.
(CAP) You'll have to control pitch with power.
(F/E) Power control is OK, let use power control, please.
(CAP) We're losing altitude. (COP) Yes.
(CAP) Raise, raise the nose.
(COP) Flap?
(F/E) Shall I lower it?
(CAP) It won't go down.
(F/E) Yes, eh, by alternate.
(COP) Alternate, as expected. (F/E) Yes, it is by alternate.
(F/E) Flap is now being extended by alternate. (CAP) Yes.
(CAP) Eh, uncontrol, Japan Air 123 uncontrol.
(ACC) 123, roger. Japan Air 123 Japan Air 123, switch frequency to 119.7, 119.7, please.
(F/E) Japan Air 123, eh, I've selected 119.7.
(CAP) Request position.
(F/E) Request position. Japan Air 123, request position.
(F/E) They say we're 25 miles west of Kumagaya.
(CAP) Can you extend flap?
(COP) Yes, flap 10.
(CAP) Raise the nose. Raise the nose. Raise the nose.
(CAP) Raise the nose.
(COP) I've been holding for a long time.
(COP) Power.
(CAP) Hey, halt the flap.
(?) Ah...
(CAP) Power! Don't extend the flaps so deeply!
(COP) Flap up, flap up, flap up, flap up.
(CAP) Flap up. (COP) Yes.
(CAP) Power. Power! Flap!
(F/E) It is up.
(CAP) It'll stall!
(CAP) Raise the nose. Raise the nose! Power!
(GPWS) Sink rate.
WHOOPWHOOP
PULL UP
WHOOPWHOOP
PULL UP
WHOOPWHOOP
PULL UP (CAP) It's the end!(?)
WHOOPWHOOP
PULL UP (Sound of Engine 4 impacting ridge)
WHOOPWHOOP
PULL UP
(Sound of further contact and crash).
United States Air Force air traffic controllers at Yokota Air Base, situated near the flight path of JAL 123, had been monitoring the aircraft's distress calls and maintained contact with Japanese air traffic control throughout. They made the Yokota runway available to JAL 123, as did the US Atsugi Naval Base after being alerted to the situation. After losing radar contact, a U.S. Air Force C-130 from the 345th TAS was tasked to search for the missing plane. The C-130 crew was the first to spot the crash site 20 minutes after impact, while it was still daylight. The crew radioed the location to the Japanese and Yokota Air Base and directed an Iroquois helicopter from Yokota to the crash site. Rescue teams were assembled, prepared to lower Marines from helicopters. However, American offers of assistance in mounting a search and rescue mission were declined by the Japanese government who determined that the mission would be undertaken by the Japan Self-Defense Forces (JSDF) and that outside help was not necessary. It remains unclear why the offers were declined.[citation needed]
A JSDF helicopter later spotted the wreck but after nightfall. Poor visibility and the difficult mountainous terrain prevented it from landing at the site. The pilot reported from the air that there were no signs of survivors. Based on this report, JSDF personnel on the ground did not set out to the site on the night of the crash. Instead, they were dispatched to spend the night at a makeshift village erecting tents, constructing helicopter landing ramps and engaging in other preparations, 63 kilometres (39 miles) from the crash site. Rescue teams did not set out for the site until the following morning. Medical staff later found bodies with injuries suggesting that individuals had survived the crash only to die from shock, exposure overnight in the mountains, or from injuries that, if tended to earlier, would not have been fatal.[10] One doctor said "If the discovery had come ten hours earlier, we could have found more survivors."[16]
Off-duty flight attendant Yumi Ochiai, one of the four survivors out of 524 passengers and crew, recounted from her hospital bed that she recalled bright lights and the sound of helicopter rotors shortly after she awoke amid the wreckage, and while she could hear screaming and moaning from other survivors, these sounds gradually died away during the night.[10]
The official cause of the crash according to the report published by Japan's Aircraft Accident Investigation Commission is as follows:
The Japanese public's confidence in Japan Air Lines took a dramatic downturn in the wake of the disaster, with passenger numbers on domestic routes dropping by one third. Rumors persisted that Boeing had admitted fault to cover up shortcomings in the airline's inspection procedures, thereby protecting the reputation of a major customer.[10] In the months after the crash, domestic traffic decreased by as much as 25%. In 1986, for the first time in a decade, fewer passengers boarded JAL's overseas flights during the New Year period than the previous year. Some of them considered switching to All Nippon Airways as a safer alternative.[20]
JAL paid ¥780 million (US$7.6 million) to the victims' relatives in the form of "condolence money" without admitting liability. JAL president, Yasumoto Takagi (高木 養根), resigned.[10] In the aftermath of the incident, Hiroo Tominaga, a JAL maintenance manager, killed himself to atone for the incident,[21] while Susumu Tajima, an engineer who had inspected and cleared the aircraft as flightworthy, committed suicide due to difficulties at work.[22]
In compliance with standard procedures, Japan Air Lines dropped the flight number 123 for their Haneda-Itami routes, changing it to Flight 121 and Flight 127 on September 1, 1985. While Boeing 747s were still used on the same route operating with the new flight numbers in the years following the crash, they were replaced by the Boeing 767 or Boeing 777 in the mid-1990s. The 747s continued serving JAL until their 2011 retirement. March 2 of the same year saw the retirement of the airline's final two 747s, which were -400 series.
In 2009, stairs with a handrail were installed to facilitate visitors' access to the crash site. Japan Transport Minister Seiji Maehara visited the site on August 12, 2010, to pray for the victims.[23] Families of the victims, together with local volunteer groups, hold an annual memorial gathering every August 12 near the crash site in Gunma Prefecture.[24]
The crash led to the 2006 opening of the Safety Promotion Center,[25][26] which is located in the Daini Sogo Building in the grounds of Haneda Airport.[27] This center was created for training purposes to alert employees to the importance of airline safety and their personal responsibility to ensure safety. The center has displays regarding aviation safety, the history of the crash, and selected pieces of the aircraft and passenger effects (including handwritten farewell notes). It is open to the public by appointment made two months prior to the visit.[28]
The captain's daughter, Yoko Takahama, who was a high school student at the time of the crash, went on to become a flight attendant for Japan Air Lines.[29]
Japanese banker Akihisa Yukawa had an undisclosed second family at the time he died in the crash. (His wife had earlier suffered severe brain injuries.) His partner, pregnant with their second child, returned with her family to London, where she and Yukawa had met. To avoid embarrassment to Yukawa's family she accepted a settlement of £340,000 rather than claiming under the airline's compensation scheme. In 2002 the airline made an undisclosed payment enabling the two children, Cassie and Diana, to complete their education.[30]
Similar accidents involving loss of flight controls:
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