Trigana Air Service Flight 267

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Trigana Air Service Flight 267
PKYRN.JPG

The crashed machine in September 2008

Accident summary
Accident type controlled flight into terrain
place Okbape District, Papua Province , IndonesiaIndonesiaIndonesia 
date August 16, 2015
Fatalities 54
Survivors 0
Aircraft
Aircraft type ATR 42-300
operator Trigana Air Service
Mark PK-YRN
Departure airport Jayapura Airport , IndonesiaIndonesiaIndonesia 
Destination airport Oksibil Airport , IndonesiaIndonesiaIndonesia 
Passengers 49
crew 5
Lists of aviation accidents

Trigana Air Service Flight 267 ( IL267 for short ) was a scheduled domestic flight of the Indonesian airline Trigana Air Service from Jayapura to Oksibil in the Indonesian province of Papua , on which radio contact with the ATR 42-300 was broken on August 16, 2015 . Residents in remote Okbape District said they saw the plane crash into a mountain. The following day, the scene of the accident was located by a search aircraft.

plane

The ATR 42-300 with the serial number 102 had its first flight in May 1988. At the time of the accident, the machine was 27 years and 3 months old and had completed 50,133.65 flight hours and 55,663 flight cycles. The aircraft was equipped with two Pratt & Whitney Canada PW120 engines and Hamilton Sundstrand 14SF-5 propellers.

Trigana Air Service bought the aircraft in January 2005 from Trans States Airlines , which decommissioned it in September 2004 and has since parked at Chicago Rockford International Airport .

The aircraft was registered in Indonesia with the aircraft registration PK-YRN .

course

Departure and destination airports as well as the crash site of flight IL267 on the island of New Guinea .

f1Georeferencing Map with all coordinates: OSM | WikiMap

The aircraft took off from Jayapura Airport at 2:22 p.m. East Indonesian time (05:22 UTC) , with an expected arrival time at Oksibil Airport of 3:04 p.m. (06:04 UTC). A total of 54 people were on board, consisting of two pilots, two flight attendants, a technician from the airline and 49 passengers (44 adults, two children and three small children). For the crew it was the fifth flight that day and the second on the Jayapura – Oksibil route.

At 2:55 p.m. (05:55 UTC), the pilots made radio contact with the Airfield Flight Information Service (AFIS) in Oksibil for the first time and reported an altitude of 11,500 feet (about 3,500 meters) at AMBISIBIL 4 ° 40 ′ 16 "  S , 140 ° 34 '28"  O . The flight controller acknowledged this message and recommended that the pilots report again when they fly over the airport. The pilots replied that they intended to fly directly into the left transverse approach of runway 11. The flight controller then recommended that the pilots continue the approach and report again if they were on the final approach to runway 11.

At 3:00 p.m. (06:00 UTC), the flight controller expected the aircraft on its final approach, but the pilots had not yet reported. The flight controller tried to establish contact with the aircraft by radio, but received no answer. The flight controller therefore contacted the Trigana flight operations management at Jayapura Airport and informed them that radio contact with the pilots of Flight 267 had been broken off. The flight operations management then made radio contact with another nearby pilot of the company and asked him to make radio contact with the pilots and to look for the missing machine. In turn, the flight controller contacted the offices of the airfields in the area (Dekai 4 ° 51 ′ 22 ″  S , 139 ° 28 ′ 52 ″  E and Tanah Merah 6 ° 7 ′ 7 ″  S , 140 ° 16 ′ 0 ″  E ), which were listed as Alternative landing sites could have been considered.

Oksibil Airport does not have its own weather service. The weather observations are carried out by the flight controller. At the time of the accident there was a wind of 8  knots from 110 ° (east-south-east), the visibility was 4 to 5 kilometers, the cloud base was at an altitude of 8,000 feet (4,000 feet above the airfield) with a cloud cover from cloudy (5/8) to almost covered (7/8). Otherwise no further weather phenomena were found.

Search and find the machine

A search and rescue team was assembled at 4:30 p.m. local time (7:30 a.m. UTC). This consisted of members of the airport operator Oksibil, the local government, the police and the army. The search operation was discontinued at 6:00 p.m. (09:00 UTC) due to nightfall for the day of the accident. The following day, a Twin Otter on the flight from Oksibil to Jayapura sighted smoke in the left cross approach of runway 11. The pilot of the machine asked the pilot of a nearby Pilatus Porter to check the sighting. This pilot flew over the specified position at a low altitude and was able to confirm that the smoke came from debris from an aircraft. The pilot informed the flight manager at Oksibil Airport, who then set the search and rescue team on the march to the specified accident site.

The aircraft was on the ridge of the wreck in Tangok Okbape district in the district Pegunungan Bintang at an altitude of 8300 feet (2530 meters) above the sea level at the position of 4 ° 49 '17.2 "  S , 140 ° 29' 57.2"  O found . The location is approximately 10 nautical miles (18.5 kilometers) and a bearing of 306 ° (northwest to west) from Oksibil Airport. All aircraft occupants suffered fatal injuries and the aircraft was destroyed by the impact forces and a subsequent fire. The wreckage was distributed in a direction of 195 ° -200 °.

The voice recorder (CVR) was recovered on August 19, 2015 and brought to the office of the Indonesian NTSC for evaluation. On August 20, 2015, the flight data recorder (FDR) was also recovered and was also brought to the NTSC.

examination

The Fairchild F800 flight data recorder was read out in the office of the Indonesian NTSC. The selection process was monitored by representatives of the French BEA . The flight data could not be read out successfully. The flight data recorder was brought to the BEA in Paris for further analysis.

The recovered voice recorder of the type L-3 Communications FA2100 could be read out successfully and two hours of voice recording are available in good quality. From the relevant part of the record, the following facts were determined:

  • The flight took place in a cruising altitude of 11,500 feet on the ATS route W 66 to the point MELAM 4 ° 15 '43.7 "  S , 140 ° 33' 57.6"  O and then on to the point AMBISIBIL 4 ° 40 '16 "  S , 140 ° 34 '28 "  O .
  • The first communication between the pilots and the flight controller at Oksibil Airport took place when the aircraft was above AMBISIBIL and the pilots declared their intention to fly directly into the left transverse approach of runway 11.
  • The pilots had already extended the flaps and landing gear in preparation for landing.
  • No warnings from the ground proximity warning system were recorded until the time of impact .
  • In the period from the cruise to the impact, no preliminary discussion of the landing or the processing of checklists was recorded by the cockpit crew.

The final report on the aircraft accident investigation comes to the assumption that the EGPWS had been shut down during this flight and two flights before it: Trigana-Air-Service had determined that some of its pilots regularly prevent ground proximity warnings by interrupting the power supply to the EGPWS.

Web links

Individual evidence

  1. No way through to the plane that crashed in Indonesia. In: www.srf.ch. Swiss radio and television, August 17, 2015, accessed on August 17, 2015 .
  2. Udo Schmidt: Search teams find wreckage. In: Tagesschau online. August 17, 2015, accessed August 17, 2015 .
  3. Indonesian plane carrying 54 people crashes in Oktabe, Papua. In: www.theguardian.com. The Guardian, August 16, 2015, accessed August 17, 2015 .
  4. Indonesian police say wreckage of missing plane spotted by search aircraft. In: www.theguardian.com. The Guardian, August 17, 2015, accessed August 17, 2015 .
  5. a b c d e f g Preliminary Aircraft Accident Investigation Report No. KNKT. 08.15.17.04. (pdf) PT. Trigana Air Service; ATR 42-300, PK-YRN; Near Oksibil, Papua; Republic of Indonesia; August 16, 2015. In: kemhubri.dephub.go.id. Nasional Keselamatan Transportasi Committee, archived from the original on March 4, 2016 ; accessed on October 2, 2015 .
  6. Aircraft history of the PK-YRN. In: www.planespotters.net. Planespotters.net, accessed October 8, 2015 .
  7. Aircraft Accident Investigation Report KNKT. 08.15.17.04. Retrieved February 2, 2019 .

Remarks

  1. Both flight numbers 257 and 267 were mentioned several times in the media and on the part of the Indonesian authorities . The French BEA involved in the accident investigation named flight number 257. Flight number 267 is mentioned in the interim report. Until the final accident investigation report is published, flight number 257 will be mentioned in this article. See also the article discussion.
  2. In the preliminary aircraft accident investigation report a wind speed of 8 knots is stated on page 7 and 9 knots on page 14.
  3. ^ Indonesian Komite Nasional Keselamatan Transportasi (KNKT) , English National Transportation Safety Committee (NTSC) to German  National Commission for Transport Safety .
  4. Representatives of the French BEA take part in the accident investigation because the aircraft manufacturer is headquartered in Toulouse.
  5. The W 67 is mentioned here in the preliminary aircraft accident investigation report . According AIP INDONESIA ENR 3.1 ATS ROUTES - LOWER & DOMESTIC is in the range from Jayapura ( "JPA") VOR / DME 2 ° 35 '15.7 "  S , 140 ° 31' 51"  O to the point, however, a MELAM Section of the WHISKEY SIX SIX , i.e. W 66 .

Coordinates: 4 ° 49 ′ 17.2 ″  S , 140 ° 29 ′ 57.2 ″  E