ASN Wikibase Occurrence # 37682
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| Date: | Friday 9 February 1990 |
| Time: | 11:14 |
| Type: |  Mitsubishi MU-2B-60 Marquise |
| Owner/operator: | Aeromedical Services International |
| Registration: | N64MD |
| MSN: | 747SA |
| Year of manufacture: | 1979 |
| Total airframe hrs: | 4382 hours |
| Engine model: | GARRETT TPE-331-10 |
| Fatalities: | Fatalities: 1 / Occupants: 4 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Rapid City Regional (RAP), SD -
 United States of America
|
| Phase: | Take off |
| Nature: | Ambulance |
| Departure airport: | Rapid City, South Dakota (RAP/KRAP) |
| Winnipeg, Manitoba,Canada (CYWG) | |
| Confidence Rating: |  Information is only available from news, social media or unofficial sources |
On take-off from Runway 14 at Rapid City Regional Airport, Rapid City, Pennington County, South Dakota, the aircraft was seen to be climbing more steeply than normal while, at the same time, the left propeller was slowing to a stop. The aircraft entered a rapid roll to the left, lost height and crashed inverted beside the runway. The accident happened in daylight and in VMC. At the time of the accident the aircraft was operating an air ambulance flight from Yuma to Winnipeg (Canada) with a refuelling stop at Rapid City.
The aircraft had originally taken off from Las Vegas. The preliminary investigation discovered that, on take-off, the aircraft apparently had excessive nose-up trim and it has subsequently been suggested that the pilot may have lost control whilst attempting to deal with this at the same time as the loss of the left engine. The NTSB investigation revealed that a coupling shaft (Part Number 865888-3) had failed in the left engine and the left propeller had feathered. A metallurgical examination of the coupling showed evidence of fatigue.
The NTSB determined the probable cause to be: Failure of the pilot to maintain adequate airspeed, which resulted in a loss of aircraft control. A factor related to the accident was: fatigue failure of a coupling shaft in the No.1 engine, which resulted in loss of power in that engine. Of the four persons on board, there was one fatality, one serious injury, and two minor injuries. The registration N64MD was cancelled by the FAA on March 16 1990. (It was re-issued on December 20 2010 to another MU-2B-60, c/no 1561SA).
Sources:
https://www.ntsb.gov/_layouts/ntsb.aviation/brief.aspx?ev_id=20001212X22539
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 24-Oct-2008 10:30 | ASN archive | Added |
| 04-Mar-2016 21:34 | Dr.John Smith | Updated [Time, Operator, Location, Nature, Departure airport, Destination airport, Source, Narrative] |
| 04-Mar-2016 21:38 | Dr.John Smith | Updated [Narrative] |
| 04-Mar-2016 21:38 | Dr.John Smith | Updated [Location] |
| 21-Dec-2016 19:23 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 04-Aug-2017 08:40 | TB | Updated [Location, Source, Damage] |
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