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Accident
Last updated: 18 November 2017
Statuts:Enquête Officielle
Date:mardi 23 août 2005
Heure:15:09
Type/Sous-type:Silhouette image of generic B732 model; specific model in this crash may look slightly different
Boeing 737-244
Compagnie:Transportes Aéreos Nacionales de la Selva - TANS
Immatriculation: OB-1809-P
Numéro de série: 22580/787
Année de Fabrication: 1981-08-04 (24 years )
Heures de vol:49865
Cycles:45262
Moteurs: 2 Pratt & Whitney JT8D-17A
Equipage:victimes: 5 / à bord: 7
Passagers:victimes: 35 / à bord: 91
Total:victimes: 40 / à bord: 98
Dégats de l'appareil: Détruit
Conséquences: Written off (damaged beyond repair)
Lieu de l'accident:5,5 km (3.4 milles) S of Pucallpa-Cap. FAP David A. Abensur Rengifo Airport (PCL) (   Pérou)
Phase de vol: En approche (APR)
Nature:Transport de Passagers Nat.
Aéroport de départ:Lima-Jorge Chávez International Airport (LIM/SPIM), Pérou
Aéroport de destination:Pucallpa-Cap. FAP David A. Abensur Rengifo Airport (PCL/SPCL), Pérou
Numéro de vol: 204
Détails:
TANS Flight 204 departed Lima at 14:24 on a scheduled 53-minute flight to Pucallpa. After an intermediate stop there the airplane was to continue to Iquitos.
At 14:52 the crew initiated the descent towards Pucallpa with the intention of carrying out a visual approach and landing. While approaching Pucallpa meteorological conditions deteriorated with towering cumulus clouds, strong winds and heavy rainfall. The runway 02 approach was unstabilized, but the crew continued the approach. The GPWS sounded as the airplane penetrated a severe hailstorm. The crew lost situational awareness and failed to abort the descent. The Boeing 737 crash-landed in swampland and broke up. It appeared that a copilot under instruction was in the right hand seat while the regular copilot was in the passenger cabin at the time of the accident.

Probable Cause:

CONCLUSIONS (translated from Spanish): The Commission determines the likely cause of the accident, as follows:
1) The decision of the flight crew to continue the final approach and landing at the airport of Pucallpa in severe weather (storm).
2) The decision of the flight crew to descend unstabilized and not act to stop the steep descent to the ground at a descent rate of above 1500 feet per minute; what triggered the GPWS (Ground Proximity Warning System).
3) The decision of the flight crew not avoid the storm, not choosing to conduct a landing on the other runway or divert to the nearest airport until weather conditions improved.
4) The decision of the flight crew to penetrate the storm, it having been detected on weather radar aircraft approximately 190 miles in advance.
5) The loss of the horizontal and vertical visibility of the flight crew while penetrating the core of the storm (severe hailstorm). Severe hail causes obscuration of the front windows of the aircraft and therefore the total loss of situational awareness.

Accident investigation:
cover
Investigating agency: CIAA Peru
Status: Investigation completed
Duration: 10 months
Accident number: CIAA-ACCID-008-2005
Download report: Final report

METAR Weather report:
20:00 UTC / 15:00 local time:
SPCL 232000Z 02003KT 9999 FEW020 35/26 Q1009 RMK PP000

20:10 UTC / 15:10 local time:
SPECI SPCL 232010Z 01003KT 2000 TSFU BKN013 FEW015CB 31/26 Q1009

21:00 UTC / 16:00 local time:
SPCL 232100Z 22013KT 3000 – TSRA BKN014 FEW017 CB SCT100 25/23


Photos

photo of Boeing 737-244 ZS-SIA
ZS-SIA was sold to Peru in 2005 to operate for TANS
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Plan
Ce plan montre l'aéroport de départ ainsi que la supposée destination du vol. La ligne fixe reliant les deux aéroports n'est pas le plan de vol exact.
La distance entre Lima-Jorge Chávez International Airport et Pucallpa-Cap. FAP David A. Abensur Rengifo Airport est de 489 km (306 miles).
Accident location: Exact; as reported in the official accident report.

Les informations ci-dessus ne représentent pas l'opinion de la 'Flight Safety Foundation' ou de 'Aviation Safety Network' sur les causes de l'accident. Ces informations prélimimaires sont basées sur les faits tel qu'ils sont connus à ce jour.
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Boeing 737-200

  • 1114 built
  • 101ème loss
  • 50ème accident fatal
  • le accident 30ème le plus grave (à ce moment là)
  • le accident 35ème le plus grave (en ce moment)
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 Pérou
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  • le accident 13ème le plus grave (en ce moment)
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