Martin Charles A ZENITH STOL CH 750 N699TX
28 June 2013 · Paragould, Arkansas, United States · No injuries
Summary
On 28 June 2013 at about 16:00 local time, a Martin Charles A ZENITH STOL CH 750 registered N699TX was involved in an incident near Paragould, Arkansas, United States. One person was 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 16:00
- Classification
- Incident
- Location
- Paragould, Arkansas, United States
- Nearest airport
- Kirk Field (PGR)
- Coordinates
- 36.0639, -90.5092
- Aircraft
- Martin Charles A ZENITH STOL CH 750
- Registration
- N699TX
- Category
- Airplane
- Year built
- 2012
- Engines
- 1
- Operator
- Not recorded
- Operating rule
- Part 91: General Aviation
- Purpose of flight
- Personal
- Phase of flight
- Not recorded
- Route
- Paragould → Grosse Ile
- Aircraft damage
- Minor
- Weather
- VMC
- Light
- Day
- NTSB number
- CEN13IA387
People
Nobody was injured.
| On board | Died | Serious | Minor | Uninjured |
|---|---|---|---|---|
| 1 | 0 | 0 | 0 | 1 |
Probable cause
The improper installation of the propeller flange, which resulted in an in-flight separation of the propeller assembly.
Quoted verbatim from the NTSB record. This site does not paraphrase or interpret it.
Read the full NTSB narrative
The pilot reported that, during the climb after takeoff, the engine "developed an immediate and heavy vibration." The intensity of the vibration increased, and the pilot was considering shutting the engine down when the vibration abruptly ceased. Looking out the windshield, he observed that the propeller had separated from the airplane. The pilot subsequently executed a forced landing to a field. Metallurgical examination determined that the propeller separation was initiated by a fatigue failure of two propeller flange-to-engine crankshaft flange attachment bolts. Further examination revealed that an incorrect thread lock compound was used on the propeller bolts, and the presence of a second compound suggested that the bolts were not properly cleaned before installation. In addition, washers used in the installation did not correspond with the washers specified by the manufacturer. Finally, extensive fretting damage to the propeller and crankshaft flanges in conjunction with the limited number of flight hours indicated that the attachment bolts were not torqued sufficiently at the time of installation. Available maintenance records did not include any entry noting that the propeller assembly had been removed since the initial installation.
Quoted verbatim from the NTSB record.
Other accidents in this area
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 22 Apr 2013 | Alon A2 | Greenbrier, Arkansas, United States | Charles Snyder | Fatal | 1 |
| 10 Jun 2013 | Cessna 150K | Morrilton, Arkansas, United States | Flight Instructor | Minor injuries | - |
| 7 Feb 2013 | Air Tractor AT-502 | Forrest City, Arkansas, United States | South Delta Aviation Inc | Minor injuries | - |
| 13 Sep 2013 | Jabiru Usa Sport J230-SP | Conway, Arkansas, United States | Loyd Mitchell | No injuries | - |
| 31 Jul 2013 | Cessna 140 | Jonesboro, Arkansas, United States | - | No injuries | - |
| 19 Jun 2013 | Bell 206-L4 | Lake City, Arkansas, United States | Air Evac EMS INC | No injuries | - |