Beschrijving:
The aircraft was on a corporate flight from Philadelphia International Airport, USA, to Toronto International Airport when it crashed, 7.6. nm from the threshold of runway 24R while being vectored for an ILS approach.
The aircraft was observed to descend steeply from cloud and execute a series of abrupt, rolling movements, before striking the ground in a nose low, inverted attitude. A severe fire followed. The two crew members and three passengers die in the crash.
The investigators noted that there are indications of a pre-impact internal failure in the low pressure compressor of the right engine. The cause of this could not be determined.
There are also indications that the left engine was flamed out and windmilling at impact. The cause of this could not be determined.
It was also noted that wing anti-ice was not operating at impact, while icing conditions were present along the flight path of N99S as it descended and approached the localizer.
Cause-Related Findings
1. The cause or causes of this accident could not be determined.
| Status: | Accident investigation report completed and information captured |
| Datum: | dinsdag 11 januari 1983 |
| Type: |  Rockwell Sabreliner 65 |
| Luchtvaartmaatschappij: | Sun Oil Co |
| Registratie: | N99S |
| Constructienummer: | 465-64 |
| Bouwjaar: | 1981 |
| Aantal vlieguren: | 668 |
| Aantal vluchten: | 407 |
| Motoren: | 2 Garrett TFE731-3R-1D |
| Bemanning: | slachtoffers: 2 / inzittenden: 2 |
| Passagiers: | slachtoffers: 3 / inzittenden: 3 |
| Totaal: | slachtoffers: 5 / inzittenden: 5 |
| Schade: | Vernield |
| Gevolgen: | Written off (damaged beyond repair) |
| Plaats: | 13 km (8.1 mijl) NE of Toronto International Airport, ON (YYZ) ( Canada)
|
| Fase: | Nadering (APR) |
| Soort vlucht: | Zaken |
| Vliegveld van vertrek: | Philadelphia International Airport, PA (PHL/KPHL), Verenigde Staten |
| Toronto International Airport, ON (YYZ/CYYZ), Canada |
The aircraft was on a corporate flight from Philadelphia International Airport, USA, to Toronto International Airport when it crashed, 7.6. nm from the threshold of runway 24R while being vectored for an ILS approach.
The aircraft was observed to descend steeply from cloud and execute a series of abrupt, rolling movements, before striking the ground in a nose low, inverted attitude. A severe fire followed. The two crew members and three passengers die in the crash.
The investigators noted that there are indications of a pre-impact internal failure in the low pressure compressor of the right engine. The cause of this could not be determined.
There are also indications that the left engine was flamed out and windmilling at impact. The cause of this could not be determined.
It was also noted that wing anti-ice was not operating at impact, while icing conditions were present along the flight path of N99S as it descended and approached the localizer.
Probable Cause:
Cause-Related Findings
1. The cause or causes of this accident could not be determined.
Bronnen:
» CASB Report No. 83-030901Veiligheidsmaatregelen
CASB issued 4 Safety Recommendations
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Foto's
Kaart
Deze kaart geeft het vliegveld van vetrek weer en de geplande bestemming van de vlucht. De lijn tussen de vliegvelden geeft niet de exacte vliegroute weer.
De afstand tussen Philadelphia International Airport, PA en Toronto International Airport, ON bedraagt 554 km (346 miles).
Accident location: Exact; deduced from official accident report.
De afstand tussen Philadelphia International Airport, PA en Toronto International Airport, ON bedraagt 554 km (346 miles).
Accident location: Exact; deduced from official accident report.
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.
languages: 
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Sabreliner
- 671 built
- 29e ongeval
- 22e dodelijk ongeval
- 4e zwaarste ongeval (toen het plaatsvond)
- 9e zwaarste ongeval (op dit moment)
Canada- 62e zwaarste ongeval (toen het plaatsvond)
- 82e zwaarste ongeval (op dit moment)
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