Crash of a Mitsubishi MU-2B-25 Marquise near Post Oak: 1 killed

Date & Time: Nov 26, 1979 at 0555 LT
Type of aircraft:
Mitsubishi MU-2 Marquise
Operator:
Turbine Aircraft Parts
Registration:
N234MA
Flight Phase:
Flight
Flight Type:
Executive/Corporate/Business
Survivors:
No
Site:
Plain, Valley
Schedule:
Jackson - Ardmore
MSN:
252
YOM:
1973
Location:
Post Oak
Texas
Country:
United States of America
Region:
North America
Crew on board:
1
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
1
Captain / Total flying hours:
11274
Captain / Total hours on type:
1045.00
Circumstances:
While in cruising altitude on a flight from Jackson, Mississippi, to Ardmore, Oklahoma, the twin engine airplane lost height then entered a dive and crashed near Post Oak. The pilot, sole on board, was killed.
Probable cause:
Uncontrolled descent and subsequent uncontrolled collision with ground due to pilot physical impairment. The following contributing factors were reported:
- Alcoholic impairment of efficiency and judgment,
- Pilot fatigue,
- Blood alcohol level 1,7‰,
- The pilot did not sleep for 48 hours,
- Autopilot on,
- Hyperactive dog aboard.
Final Report:

Crash of a Mitsubishi MU-2B-10 Marquise in Hays: 7 killed

Date & Time: Aug 3, 1979 at 2125 LT
Type of aircraft:
Mitsubishi MU-2 Marquise
Operator:
Turbine Aircraft Parts
Registration:
N208MA
Flight Phase:
Flight
Flight Type:
Private
Survivors:
No
Site:
Plain, Valley
Schedule:
Salina - Denver
MSN:
16
YOM:
1967
Location:
Hays
Kansas
Country:
United States of America
Region:
North America
Crew on board:
1
Crew fatalities:
Pax on board:
6
Pax fatalities:
Other fatalities:
Total fatalities:
7
Captain / Total flying hours:
2168
Captain / Total hours on type:
140.00
Circumstances:
En route from Salina to Denver, the pilot informed ATC about an engine failure and elected to divert to the nearest airport. The airplane lost height and eventually stalled and crashed in Hays. The aircraft was destroyed and all seven occupants were killed.
Probable cause:
Engine failure during normal cruise and subsequent stall due to compressor assembly bearing failure. The following contributing factors were reported:
- Material failure,
- Improper in-flight decisions,
- Failed to maintain flying speed,
- Complete failure one engine,
- Forward main shaft bearing failed.
Final Report:
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