Mitsubishi MU-2B N722DM
2 July 1990 · Tyndall Afb, Florida, United States · No injuries
Summary
On 2 July 1990 at about 19:00 local time, a Mitsubishi MU-2B registered N722DM, operated by Flight International, was involved in an incident near Tyndall Afb, Florida, United States. 2 people were on board and nobody was injured. The aircraft was slightly damaged. The NTSB has published a probable cause for this accident; it is quoted in full below.
The record
- Date
- at 19:00
- Classification
- Incident
- Location
- Tyndall Afb, Florida, United States
- Nearest airport
- Tyndall Afb (KPAM)
- Coordinates
- 30.0507, -85.5492
- Aircraft
- Mitsubishi MU-2B
- Registration
- N722DM
- Category
- Airplane
- Engines
- 2
- Operator
- Flight International
- Operating rule
- Part 91: General Aviation
- Purpose of flight
- Other Work Use
- Phase of flight
- Not recorded
- Aircraft damage
- Minor
- Weather
- VMC
- Light
- Day
- NTSB number
- MIA90IA148
People
Nobody was injured.
| On board | Died | Serious | Minor | Uninjured |
|---|---|---|---|---|
| 2 | 0 | 0 | 0 | 2 |
Probable cause
A PROPELLER BLADE FATIGUE FAILURE DUE TO IMPROPER OVERHAUL BY OTHER MAINTENANCE PERSONNEL NOT PERFORMING OVERHAUL IN ACCORDANCE WITH FACTORY SERVICE BULLETINS.
Quoted verbatim from the NTSB record. This site does not paraphrase or interpret it.
Read the full NTSB narrative
THE PILOT NOTED A SEVERE VIBRATION IN FLIGHT FROM THE LEFT ENGINE. HE SHUT THE ENGINE DOWN AND LANDED. ONE PROPELLER BLADE WAS MISSING PART OF THE BLADE. THE FAILED ASSEMBLY WAS EXAMINED AND THE FAILED BLADE SHOWED EVIDENCE OF HIGH CYCLE, LOW STREES FATIGUE WITH A SURFACE ORIGIN. THE OTHER TWO BLADES WERE FOUND TO BE LESS THAN MINIMUM DIMENSIONS AND HAD IMPROPERLY POLISHED AND PROTECTED SURFACES.
Quoted verbatim from the NTSB record.
Other Mitsubishi MU-2B accidents
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 9 Jan 1990 | Mitsubishi MU-2B-25 | Jacksonville, Florida, United States | Riggs, Charles A. | No injuries | - |
| 6 Sep 1990 | Mitsubishi MU-2B-36 | Nashville, Tennessee, United States | Tennessee Air Corp. | Fatal | 1 |
| 14 Feb 1990 | Mitsubishi MU-2B-60 | Putnam, Texas, United States | - | Fatal | 5 |
| 9 Feb 1990 | Mitsubishi MU-2B-60 | Rapid City, South Dakota, United States | Aeromedical Services Intl | Fatal | 1 |
| 9 Feb 1990 | Mitsubishi MU-2B-35 | Teterboro, New Jersey, United States | Epps Air Service | No injuries | - |
| 19 Jan 1990 | Mitsubishi MU-2B-25 | Broomfield, Colorado, United States | - | No injuries | - |
Other accidents in this area
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 6 Jan 1990 | Lockheed L1329 | Miami, Florida, United States | Tokoph, David | Fatal | 1 |
| 12 Dec 1990 | Cessna 172G | Jacksonville, Florida, United States | Weeks, Milton D. | Serious injuries | - |
| 6 Jan 1990 | Piper PA-30 | Tallahassee, Florida, United States | Calley, Nicholas O. | Serious injuries | - |
| 12 Dec 1990 | Piper PA-28-151 | Jupiter, Florida, United States | Zimmerman, Barry L. | No injuries | - |
| 20 Jan 1990 | Piper J-3 | Clewiston, Florida, United States | Nesbitt, James K. | Fatal | 2 |
| 15 Dec 1990 | Beechcraft F33A | Lakeland, Florida, United States | Globe Aero Ltd. | No injuries | - |