Unfallbericht:
The flight was uneventful during takeoff and climb to an assigned cruise altitude of FL260. Approximately 40 minutes after takeoff the number 3 engine experienced an uncontained failure of the turbine blades on the number 4 power turbine wheel. Although debris from the engine penetrated the pressure vessel, the pilot made an unscheduled landing at Fresno Airport, California without further incident. Examination of the engine revealed that ferrous chips were contaminating, and oil was bypassing the engine oil filter for at least 40 days. However, no corrective action was taken by company maintenance personnel. The oil and filter were changed three times in the three months previous to the accident. The examination revealed that the contaminated oil contributed to the failure of the number four turbine bearing subsequently leading to overheating and damage to the overspeed sensors. The turbine oversped and the turbine blades departed the turbine disc.
Probable cause:
Failure of company maintenance personnel to adequately examine the engine lubrication system when contamination was detected.
| Status: | Accident investigation report completed and information captured |
| Datum: | Freitag 27 Februar 1987 |
| Zeit: | 20:00 |
| Flugzeugtyp: |  British Aerospace BAe-146-200A |
| Fluggesellschaft: | Pacific Southwest Airlines - PSA |
| Kennzeichen: | N356PS |
| Werknummer: | E2039 |
| Baujahr: | |
| Betriebsstunden: | 4662 |
| Besatzung: | Todesopfer: 0 / Insassen: 4 |
| Fluggäste: | Todesopfer: 0 / Insassen: 83 |
| Gesamt: | Todesopfer: 0 / Insassen: 87 |
| Sachschaden: | schwer beschädigt |
| Konsequenzen: | Repaired |
| Unfallort: | Fresno Air Terminal, CA (FAT) ( USA)
|
| Flugphase: | Während des Fluges (ENR) |
| Betriebsart: | Inländischer planmäßiger Passagierflug |
| Flug von: | Los Angeles International Airport, CA (LAX/KLAX), USA |
| Reno/Tahoe International Airport, NV (RNO/KRNO), USA |
The flight was uneventful during takeoff and climb to an assigned cruise altitude of FL260. Approximately 40 minutes after takeoff the number 3 engine experienced an uncontained failure of the turbine blades on the number 4 power turbine wheel. Although debris from the engine penetrated the pressure vessel, the pilot made an unscheduled landing at Fresno Airport, California without further incident. Examination of the engine revealed that ferrous chips were contaminating, and oil was bypassing the engine oil filter for at least 40 days. However, no corrective action was taken by company maintenance personnel. The oil and filter were changed three times in the three months previous to the accident. The examination revealed that the contaminated oil contributed to the failure of the number four turbine bearing subsequently leading to overheating and damage to the overspeed sensors. The turbine oversped and the turbine blades departed the turbine disc.
Probable Cause:
Probable cause:
Failure of company maintenance personnel to adequately examine the engine lubrication system when contamination was detected.
Accident investigation:
 |
|
Informationsquelle:
» NTSBFotos
Map
This map shows the airport of departure and the intended destination of the flight. The line between the airports does not display the exact flight path.
Distance from Los Angeles International Airport, CA to Reno/Tahoe International Airport, NV as the crow flies is 625 km (391 miles).
Distance from Los Angeles International Airport, CA to Reno/Tahoe International Airport, NV as the crow flies is 625 km (391 miles).
This information is not presented as the Flight Safety Foundation or the Aviation Safety Network’s opinion as to the cause of the accident. It is preliminary and is based on the facts as they are known at this time.
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