https://avherald.com/h?article=4e18553c&opt=0 The Aviation Herald Last Update: Saturday, Jan 9th 2021 20:37Z 26301 Articles available Events from Jun 19th 1999 to Jan 9th 2021 www.avherald.com Incidents and News in Aviation Next Sort list List Earlier Next Later List by: by currently Filter: Crashes Accidents Incidents News Reports [ ] search Article Article Occurrence sorted by On On On On On date Update --------------------------------------------------------------------- [INS::INS] [INS::INS] The Aviation Herald Apps Android and iOS Crash: Sriwijaya B735 at Jakarta on Jan 9th 2021, lost height and impacted Java Sea AVHAPP on Android and iOS Support The Aviation Herald By Simon Hradecky, created Saturday, Jan 9th 2021 10:37Z, last updated Saturday, Jan 9th 2021 16:06Z one time Support The Aviation Herald A Sriwijaya Boeing 737-500, registration PK-CLC performing flight SJ-182 from Jakarta to Pontianak (Indonesia) with 56 passengers and 6 Monthly support crew, had been cleared to climb to FL290 and was climbing through 1 EUR/month about 10,800 feet MSL out of Jakarta about 11nm north of Jakarta's Monthly Support The Aviation Herald Soekarno Hatta International Airport over the Java Sea when radar and radio contact was lost with the aircraft at 14:40L (07:40Z). The Interview: aircraft has so far not turned up anywhere else. A search is The human factor named "Simon underway. Debris and body parts were located in waters of about 15 Hradecky" and the team of man and meters depth near Lancang Island. machine Soekarno Airport confirmed radar and radio contact with the aircraft was lost. Data review is underway, further communication to be expected from the Ministry of Transport. Indonesia's Ministry of Transport confirmed contact with the aircraft was lost. A search and rescue operation is in progress under the coordination of Basarnas. First units of Basarnas arriving at the crash site between Laki Island and Lancang Island have located debris. The Ministry subsequently confirmed the aircraft has crashed. The aircraft had departed Soekarno Airport at 14:36L, climbing through 1700 feet the aircraft was cleared to climb to FL290. Departure control subsequently noticed that the aircraft was not on its assigned heading of 075 degrees, but tracking northwesterly and queried the crew about the heading at 14:40L, but received no reply, within second the aircraft disappeared from radar. Basarnas reported they have deployed resources to the crash site and at the moment focus on locating the aircraft, hoping to be able to establish the position of the aircraft by monring of Jan 10th 2021. Several pieces of debris have been recovered already, however, it has not yet been established they are from the aircraft. The ELT transmitters of the aircraft did not and do not transmit any signals. The airline stated they are in contact with aviation authorities and seeking more information. A statement will be issued once all necessary details have been established. On Jan 9th 2021 at about 21:40L (14:40Z) the airline released a statement confirming contact with the aircraft was lost at 14:40L. The aircraft carried 40 adult passengers, 7 children, 3 infants and 6 deadheading crew. The aircraft was operated by 6 active crew. The airline published a hotline phone number. Indonesia's KNKT (National Transportation Safety Commission) have opened an investigation and announced, they begin their search for the black boxes on Sunday (Jan 10th 2021). A passenger booked onto the crashed flight reported, that he had to miss the flight due to his Covid-19 PCR Test results not yet having arrived. Only after the aircraft had already departed the (negative) test results arrived which would have permitted him to board the flight. Residents of the islands nearby (Thousand Islands) were out on the sea in two boats when they heard two explosions, then found debris afloat at the sea. It was raining at that time. The residents returned one of the boats to their islands about 2 hours later and reported to police. The other boat is still at the scene holding position using an anchor. Thesse residents have so far recovered seats, cables, pockets and jeans. The captain of a ship with 28 crew, that was located about 6nm from the impact site near Lancang Island, reported they were observing an object fall into the waters and set course towards the site. They found flight jackets, body parts and debris of an aircraft. The ship is currently holding position about half a mile off the observed crash site until rescue and recovery services (of Basarnas) arrive. The water is about 15 to 16 meters deep at the crash site. According to ADS-B data the aircraft had departed Soekarno's runway 25R at 07:36Z, was climbing through 10,600 feet at 284 knots over ground at 07:39:50Z about 11nm north of Soekarno Airport and was at 07:40:11Z at 1400 feet at 307 knots over ground about 1.6nm northnortheast of that position (average sink rate 26,300 fpm). The last received ADS-B Position was S5.9730 E106.5676. https://flightaware.com/live/flight/SJY182/history/20210109/0640Z/ WIII/WIOO Metars: WIII 090900Z 29006KT 6000 -RA BKN017 25/23 Q1006 NOSIG= WIII 090830Z 29008KT 4000 RA OVC017 25/24 Q1006 NOSIG= WIII 090800Z 28008KT 4000 -RA BKN016 OVC018 26/24 Q1006 NOSIG= WIII 090730Z 30006KT 5000 -RA FEW017CB OVC018 25/24 Q1006 NOSIG= WIII 090700Z 30007KT 4000 VCTS RA FEW016CB OVC018 25/24 Q1007 NOSIG= WIII 090630Z 34007KT 2000 TSRA FEW016CB OVC018 25/24 Q1007 NOSIG RMK CB OVER THE FIELD= WIII 090600Z 34010G20KT 5000 VCTS -RA FEW016CB OVC018 26/24 Q1007 NOSIG RMK CB TO W AND NW= WIII 090530Z 35012KT 5000 VCTS -RA FEW016CB BKN018 26/25 Q1007 NOSIG RMK CB TO NW AND N= WIII 090500Z 34012KT 6000 VCTS FEW016CB BKN018 28/24 Q1008 TEMPO 5000 -TSRA RMK CB TO NW AND N= WIII 090430Z 28010KT 9999 SCT020 31/24 Q1008 NOSIG= Object believed to be an emergency slide of the aircraft recovered by Basarnas (Photo: Basarnas): Object believed to be an emergency slide of the aircraft recovered by Basarnas (Photo: Basarnas) Debris recovered by residents (Photo: winne): Debris recovered by residents (Photo: winne) Satellite Himawari Image Jan 9th 2021 07:50Z (Graphics: AVH/JMA): Satellite Himawari Image Jan 9th 2021 07:50Z (Graphics: AVH/JMA) Map (Graphics: AVH/Google Earth): Map (Graphics: AVH/Google Earth) --------------------------------------------------------------------- Reader Comments: (the comments posted below do not reflect the view of The Aviation Herald but represent the view of the various posters) --------------------------------------------------------------------- KML & Granular data ... By Stalker on Saturday, Jan 9th 2021 22:59Z --------------------------------------------------------------------- ? By SOE on Saturday, Jan 9th 2021 22:50Z So we have definite structural failure and Comparisons with Hawaiian 737 .... yet they landed (relatively) intact.. and were able to communicate. The small localised field of (so far) discovered debris suggests relatively intact on impact. All will be revealed and we can revisit.. Sorry for the families. --------------------------------------------------------------------- Sonic boom (2) By Henry S. on Saturday, Jan 9th 2021 22:45Z Part 2: If they really heard two explosions it was likely the aircraft hitting the water and a reflection from the coast or a layer of air shortly after. It's not uncommon. The rumbling of thunder is basically the same thing; sound reflections mellowing the sharp crack of lightning. But it's all speculation at this point. --------------------------------------------------------------------- Sonic boom By Henry S. on Saturday, Jan 9th 2021 22:45Z @ anonymous (Jan 9th 2021 22:06Z) @ Bas (Jan 9th 2021 19:01Z) A sonic boom can be heard everywhere around an object travelling above the speed of sound. When the observer is on front of the object, he will only hear the sonic boom after the object has already passed his location (because the object is faster than its own sound waves). But I highly doubt a passenger aircraft is able to get supersonic even when descending - at least close to the ground. The engines won't work properly any more and drag would be enormous. It will take an object free-falling without any drag roughly 34 seconds to get to Mach 1 vertically (1 G acceleration). And it needs at least 5800 m free-falling distance to do so. --------------------------------------------------------------------- @ Helmut and others re: airspeed suddenly back to 115 kts By Herb on Saturday, Jan 9th 2021 22:34Z I also found out, that the airspeed suddenly went from the climbing 358 kts and ~10'00 feet, dropped to 115 kts. Then as I can only imagine, as the plane disintegrated the ADS-B went to over 350 again but the recording stopped as it went down at over 23'400 feet per minute. I studied various websites to get these figures. And, I would suggest that people here would rather wish the relatives a fair comment; RIP to the perished never helps. --------------------------------------------------------------------- @Gregers Lund By Paul on Saturday, Jan 9th 2021 22:18Z @Gregers Lund: how exactly is this already Boeing s fault? This isn t a 737 Max, it s a 737-500 that is about three decades old flying in a region notorious for aviation safety issues. The 737-500 had a great safety record. No one knows what happened but I sincerely doubt that merely pilot Suicide or terrorism are the only two issues. Stop being so dramatic. --------------------------------------------------------------------- B-737 By Gregers Lund on Saturday, Jan 9th 2021 22:11Z If this accident is not pilot suicide or terrorist atack then I think Boeing and its shareholders have a problem. --------------------------------------------------------------------- By (anonymous) on Saturday, Jan 9th 2021 22:06Z @ Bas (Jan 9th 2021 19:01Z) >>From what I have read, witnesses heard the sound of an explosion as it hit the water, I am wondering if that may have been a sonic boom if the plane was descending at that speed?<< As far as I remember physics, this can be heard only behind the aircraft. --------------------------------------------------------------------- To all guys talking about hypoxia By steel on Saturday, Jan 9th 2021 22:05Z do you even know when hypoxia can happen? 10000 ft (highest where they got) is safe altitude to descend in case of depressurization. Even tho up until like 20000 ft you will be conscious for like 30 minutes or so. I guess wings felt off or some weird stuff like trim runaway --------------------------------------------------------------------- @Screwjack By Ken Smith on Saturday, Jan 9th 2021 21:54Z Communication is the very last thing a pilot would have on his mind when dealing with an emergency. --------------------------------------------------------------------- ADSB By Helmut on Saturday, Jan 9th 2021 21:35Z The adsb suggests airspeed decayed to 115kts. Maybe someone can publish the figures with more detail here. --------------------------------------------------------------------- No, not Helios By (anonymous) on Saturday, Jan 9th 2021 21:25Z As another commenter mentioned, the air at that altitude is hardly different enough in pressure from sea level, and so there would be no risk of incapacitation; Helios was flying upwards of FL300. --------------------------------------------------------------------- Helios again? By Screwjack on Saturday, Jan 9th 2021 21:13Z No crew response? A bit early for complete hypoxia but a bit strange that the crew never called in a mayday. --------------------------------------------------------------------- SJ182 specutlation By Ken Smith on Saturday, Jan 9th 2021 20:48Z No doubt structural failure. What caused structural failure is not clear. Explosive device can be ruled out: ADS-B requires electrical power, datalink was active until splash. --------------------------------------------------------------------- By (anonymous) on Saturday, Jan 9th 2021 20:29Z the pressure difference in 10800ft is not significant so an explosive decompression is impossible --------------------------------------------------------------------- Aviate, navigate, communicate By ChrisFL410 on Saturday, Jan 9th 2021 20:20Z For all those who wonder why there was no Mayday call, the order of actions a crew will follow in case of emergency is Aviate, Navigate, Communicate. Obviously they were not able to aviate the plane, so no time for a mayday call. --------------------------------------------------------------------- Air ras sj182 By Jeanette bujold on Saturday, Jan 9th 2021 19:59Z So sudden and no mayday? Catastrophic decompression due to airframe issues. This plane was 27 yrs old. Maintenance? Was the FDR updated as required by FAA CFR 62.38362. if not will the 18 parameters tell us. I see also the crash site is not secure. Plz advise --------------------------------------------------------------------- B 735 Jakarta By GG on Saturday, Jan 9th 2021 19:42Z When reading account of this tragedy, first thing to pop into my mind was Hawaian 737 roof structure failure decades ago. Looks like same operating environment, salt atmosphere leading to corrosion. --------------------------------------------------------------------- By Jon on Saturday, Jan 9th 2021 19:27Z @PMK umm no it doesn't. This is just wrong. "the ADS-B receiver receives messages from the target illuminated by the radar in real time" ADS-B requires no interrogation by a radar. It is a self contained broadcast and/or recieve device (I don't know the laws in Indonesia but if this plane flew in the US it would require RX and TX functions) that uses the gps and sensors on the airplane. --------------------------------------------------------------------- ADS-B data reliability (1/2) By pmk on Saturday, Jan 9th 2021 19:04Z I would not take the locations, altitude and speed values displayed by the well known ADS-B tracking site too literally. First of all. the original ADS-B signal format only short message frames were used, capable of carrying just one or two parameters, thus multiple frames must be received correctly in order to construct proper location, altitude and speed vector. While the ADS-B receiver receives messages from the target illuminated by the radar in real time, the ADS-B receivers used by the tracking site does not necessary receive all frames correctly because it is often situated in an unfavorable location. The tracking system may have to assemble the data from different radar interrogation cycle, possibly timestamped with a possibly inaccurate clock. cont.. --------------------------------------------------------------------- ADS-B data reliability (2/2) By pmk on Saturday, Jan 9th 2021 19:02Z ... cont The ADS-B system clearly uses both interpolation and extrapolation to fill in missing data frames, sometimes this gives a quite nice soft tracking. However, if the plane does some high acceleration movement, taking data from different radar sweeps may cause peculiar results. In addition high dynamic movement may also make GPS data unreliable. --------------------------------------------------------------------- Explosion By Bas on Saturday, Jan 9th 2021 19:01Z From what I have read, witnesses heard the sound of an explosion as it hit the water, I am wondering if that may have been a sonic boom if the plane was descending at that speed? --------------------------------------------------------------------- Speculation inevitable... By Chris on Saturday, Jan 9th 2021 19:01Z The aircraft had been flying regularly since 18 December after a period of inactivity, so unlikely to be due to a return to service issue on the part of the aircraft, at least. Some similarity to several previous loss of control incidents soon after take-off involving B737s, but currently little evidence to support that. Possibly another serious CFM56 failure, this time catastrophic? --------------------------------------------------------------------- ELT Issues By ONUR AYTEKIN on Saturday, Jan 9th 2021 18:40Z It is really enough to see such malfunction for ELTs as the Year is 2021 and ELT failures are still on-going. There are two ELTs mandated by EASA for the aircraft manufactured after year 2008 but this is not the solution for ELT malfunctions. So many aircraft crashes are ended with ELT malfunctions (wish we see no accident anymore)... There shall be some other binding requirement for ELT from now on... --------------------------------------------------------------------- ELT By Greg F. on Saturday, Jan 9th 2021 18:38Z Please note that the fixed and portable ELT's do not work underwater and are non-crash survivable. The use of ELT's on modern commercial air transports are close to useless and the fact is that an ELT has NEVER been used to locate the crash location of the aircraft. They are a great aid for persons and in general aviation where they are much more likely to remain intact and function after a lower speed impact. As is the case here, the use of ADS-B OUT with the Iridium NEXT satellite surveillance makes the need for ELT's on commercial air transports even more redundant. I assume that in the not too distant future the Mode S transponders (which provide the ADS-B OUT signal) and related equipment will also be mandated to operate continuously without the ability of disabling from inside the aircraft (i.e. by the flight crew or any other person). --------------------------------------------------------------------- Out of control By Luis Felipe Riquelme on Saturday, Jan 9th 2021 18:28Z My condolences to the families for this tragic accident. By meantime the only thing that we can see is from the facts. Acft climbs to 10000 feet and suddenly dive into the sea without any emergency request or any signs os problems Its seems completely loss of control. No time for mayday call or anything. Whats caused? Will know soon. Just wait. But the loss of control its seems the most probably scenario. Lost of any control surface? Could be. I dont know how are the safety standards and maintenance in Indonesia. Just a serious investigation with the black boxes and critical parts of airplane found will give us the answers. Now.....just sadness for the loss of so many lives. --------------------------------------------------------------------- Condolences By JayCanada on Saturday, Jan 9th 2021 18:25Z Sincere condolences to the families and friends. A lot of info is being leaked and spread, a lot of desire to calculate using little data. Focus on a safe, effective search and recovery operation, and hope that the debris is collected properly. As people have mentioned, the 737 has a long history with several generations of changes. the Classic -500 is quite different from the NG and MAX versions. Explosion does not mean bomb, and a few preliminary ADS-B data points do not plot a descent path with any acceptable margin of error. Try to avoid a broad theory that happens to fit the info you have cherry picked, focus on developing the available information and ask what would you need to see to disprove/prove that. --------------------------------------------------------------------- @Patricia By 727driver on Saturday, Jan 9th 2021 18:24Z "Can anyone specify under which circumstances the ELT would be tripped? Are there limits of acceleration that need to be met for it to trip? And does it automatically activate on contact to water? " As far as I remember the g-switch on most ELTs activates at 2.3 g. Yes contact with water also activates the ELT. --------------------------------------------------------------------- Attention Wanton Speculators By SomeInternetWonk on Saturday, Jan 9th 2021 18:12Z Reasoned speculation is tolerable if it's presented as such. Comparison to similar incidents also. Random spitballing is not. It does nobody any good. To me, it sounds like an aircraft has crashed, and the cause is unknown. May all aboard rest in peace, and my sincerest condolences to anyone reading this who might be attached to this tragedy :( --------------------------------------------------------------------- Quit speculating By Md80wannabedriver on Saturday, Jan 9th 2021 18:08Z Some of the comments here are ridiculous. So many internet experts. Quit speculating, you sound like you have few neurons. Especially when mentioning in flight break up. Please just STOP N --------------------------------------------------------------------- Only the most recent 30 comments are shown to reduce server load. Click here to show the remaining comments --------------------------------------------------------------------- Add your comment: (max 1024 characters) Your IP address 68.37.28.109 is being tracked. 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