ASN Wikibase Occurrence # 357359
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| Date: | Thursday 23 May 1996 |
| Time: | 20:00 LT |
| Type: |  Beechcraft 1900D |
| Owner/operator: | Astral Aviation |
| Registration: | N148SK |
| MSN: | UE-148 |
| Year of manufacture: | 1995 |
| Total airframe hrs: | 2321 hours |
| Engine model: | P&W PT6A-67D |
| Fatalities: | Fatalities: 0 / Occupants: 20 |
| Aircraft damage: | Minor |
| Category: | Serious incident |
| Location: | Indianapolis, IN -
 United States of America
|
| Phase: | En route |
| Nature: | Unknown |
| Departure airport: | (KIND) |
| Milwaukee, WI (KMKE) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
Shortly after taking off, the crew of the airplane noted smoke in the cabin, and they returned and landed at the departure airport. Investigation revealed that a bearing in the forward cabin ventilation blower motor had failed. There was evidence that after the bearing had failed, the wires and resistors to the ventilation motor had overheated. The wires were charred and sooted on the blower motor housing. The resistors (for low speed fan operation) showed signs of heat damage. Current limiters were provided to protect the electrical circuit. However, research revealed that the wiring and resistors were not adequately protected in the low speed fan mode.
Probable Cause: failure of a forward cabin ventilation blower motor bearing, which resulted in binding of the blower motor; and inadequate design of the electrical system, which allowed overheating of the electrical circuit and smoke in the cabin of the aircraft.
Accident investigation:
 |
|
Sources:
NTSB CHI96IA170
History of this aircraft
Other occurrences involving this aircraft
| 8 February 1999 | N148SK | Skyway Airlines | 0 | 44 km from Milwaukee, WI | |
sub |
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 13-Mar-2024 17:01 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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