- Date
- August 5, 1982, 15:45 local (20:45 UTC)
- Place
- St. Joseph, MO
- Injuries
- 2 uninjured
- Damage
- Minor damage
- Phase of flight
- Enroute
- Aircraft
- N312MAMitsubishi MU-2B-25
- Weather
- Visual (VMC) · Day
- Status
- Completed · report August 5, 1983
- Report
- Approved by Office Director
- Case key
- 72699
From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the incident.
On this page
Sequence of events
NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.
Analysis
After takeoff, the pilot was cleared to climb to 6000 ft MSL. While climbing through about 5000 ft, he heard a loud noise (bam) as the left engine lost power. The left engine was shut down and feathered and a landing was made with no other problems. An investigation revealed that the third stage turbine wheel had failed from fatigue. Portions of the wheel, propelled by centrifugal force, exited the right side of the engine case and penetrated the left side of the cabin, resulting in minor damage. The failure created an unbalanced condition in the turbine section which allowed an asymmeterical load to be applied to the rear main bearing support. Subsequently, the bearing support failed, separated and impacted the leading edge of the left horizontal stabilizer.
Aircraft
- Registration
- N312MA
- Reported as
- Mitsubishi MU-2B-25
- Category
- Airplane
- Serial number
- 266
- Airframe hours
- 2,465
- Engine
- Garrett TPE-331-6-251, 724 horsepower, turbo prop
- Damage
- Minor damage
- Fire
- In-Flight
- Flight
- Business · Part 91
- Operator
- Bio Zyme Enterprise, Inc.
- Registered owner
- Bio Zyme Enterprise, Inc.
- Departed
- STJ · St. Joseph, MO
- Destination
- H-76 · Pawhuska, OK
- Flight plan
- IFR
- Airport
- STJ · Rosecrans Memorial, runway 17, 8,059 × 150 ft, asphalt
Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.
Flight crew
As NTSB recorded them. NTSB leaves out names.
- Role
- Pilot
- Age
- 41
- Certificates
- Commercial, Airline transport
- Airplane ratings
- Multi-engine land, Single-engine land
- Instrument ratings
- Airplane
- Medical
- Class 2, Valid Medical--no waivers/lim.
- Flight hours
- 13,553 total · 2,198 in this make and model · 106 in the last 90 days · 1 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- 180° at 10 knots
- Visibility
- 10 statute miles
- Temperature
- 176 °F
- Altimeter
- 30.00 inHg
Other investigations on N312MA · 2
Matched to the same aircraft by N-number and date.