Crash-aerien 28 SEP 1992 d'un Airbus A300B4-203 AP-BCP - Kathmandu-Tribhuvan Airport (KTM)
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Statuts:Accident investigation report completed and information captured
Date:lundi 28 septembre 1992
Type/Sous-type:Silhouette image of generic A30B model; specific model in this crash may look slightly different
Airbus A300B4-203
Compagnie:Pakistan International Airlines - PIA
Immatriculation: AP-BCP
Numéro de série: 025
Année de Fabrication: 1976-03-23 (16 years 6 months)
Heures de vol:39045
Moteurs: 2 General Electric CF6-50C2
Equipage:victimes: 19 / à bord: 19
Passagers:victimes: 148 / à bord: 148
Total:victimes: 167 / à bord: 167
Dégats de l'appareil: Détruit
Conséquences: Written off (damaged beyond repair)
Lieu de l'accident:18 km (11.3 milles) S of Kathmandu-Tribhuvan Airport (KTM) (   Népal)
Élévation des lieux de l'accident: 2225 m (7300 feet) amsl
Phase de vol: En approche (APR)
Nature:Transport de Passagers Intern.
Aéroport de départ:Karachi International Airport (KHI/OPKC), Pakistan
Aéroport de destination:Kathmandu-Tribhuvan Airport (KTM/VNKT), Népal
Numéro de vol:PK268
PIA Flight 268 departed Karachi, Pakistan at 11:13 for a scheduled passenger flight to Kathmandu, Nepal. The en route portion of the flight was uneventful and the aircraft was cleared for a Sierra approach to Kathmandu's runway 02. The flight was instructed to maintain 11500 feet and report at 16 DME (16 miles from the VOR/DME beacon, which is located 0,6 nm short of the runway). The Kathmandu approach is very difficult, since the airport is located in an oval-shaped valley surrounded by mountains as high as 9665 feet. Runway elevation is 4313 feet amsl. The next approach fixes for PK268 were at 13 DME (at 10500 feet), 10 DME (at 9500 feet) and 8 DME (at 8200 feet). A few seconds after reporting 10 DME, the aircraft descended through 8200 feet, which was the altitude for 8 DME. The Airbus impacted a steep cloud-covered hillside at approx. 7300 feet amsl at 9,16 DME.

Probable Cause:

"The balance of evidence suggests that the primary cause of the accident was that one or both pilots consistently failed to follow the approach procedure and inadvertently adopted a profile which, at each DME fix, was one altitude step ahead and below the correct procedure. Why and how that happened could not be determined with certainty because there was no record of the crew's conversation on the flight deck.
Contributory causal factors were thought to be the inevitable complexity of the approach and the associated approach chart."

» ICAO Circular 296-AN/170 (p.267-326)
» ICAO Adrep Summary 2/94 (#1)

Opérations de secours

Nepal issued 21 Safety Recommendations

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photo of Airbus-A300B4-203-AP-BCP
accident date: 28-09-1992
type: Airbus A300B4-203
registration: AP-BCP
photo of Airbus-A300B4-203-
Sierra approach profile
photo of Airbus-A300B4-203-
Approach profile
photo of Airbus-A300B4-203-AP-BCP
accident date: 28-09-1992
type: Airbus A300B4-203
registration: AP-BCP

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 Karachi International Airport et Kathmandu-Tribhuvan Airport est de 1827 km (1142 miles).
Accident location: Approximate; accuracy within a few kilometers.

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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