Waco YMF5 N14128
28 July 1997 · Lake Buena Vist, Florida, United States · No injuries
Summary
On 28 July 1997 at about 20:40 local time, a Waco YMF5 registered N14128, operated by Reilly Aviation, was involved in an accident near Lake Buena Vist, Florida, United States. 3 people were on board and nobody was injured. The aircraft was substantially damaged. The NTSB has published a probable cause for this accident; it is quoted in full below.
The record
- Date
- at 20:40
- Classification
- Accident
- Location
- Lake Buena Vist, Florida, United States
- Coordinates
- 28.3705, -81.5509
- Aircraft
- Waco YMF5
- Registration
- N14128
- Category
- Airplane
- Engines
- 1
- Operator
- Reilly Aviation
- Operating rule
- Part 91: General Aviation
- Purpose of flight
- Unknown
- Phase of flight
- Not recorded
- Route
- Kissimmee → Unknown
- Aircraft damage
- Substantial
- Weather
- VMC
- Light
- Day
- NTSB number
- MIA97LA222
People
Nobody was injured.
| On board | Died | Serious | Minor | Uninjured |
|---|---|---|---|---|
| 3 | 0 | 0 | 0 | 3 |
Probable cause
failure of maintenance personnel to follow installation procedures pertaining to the torque of the propeller retention nut, which resulted in a loose propeller retention nut, subsequent fatigue failure of the crankshaft, and loss of engine power. The lack of suitable terrain for an emergency landing was a related factor.
Quoted verbatim from the NTSB record. This site does not paraphrase or interpret it.
Read the full NTSB narrative
During cruise flight, the pilot noted an engine vibration followed by a total loss of engine power. He made a forced landing, but was unable to reach suitable terrain. During the landing rollout, he observed a ditch and intentionally ground looped the airplane, but the airplane collided with a pole. Examination of the propeller revealed the propeller retention nut was hand tight. Galling was present on the propeller hub mounting flange and the rear cone. Disassembly of the engine assembly revealed the crankshaft was broken at the counterweight flange. Visual inspection of the shear surfaces on the crankcase showed tell tale benchmarks that appeared to have originated at the oil way plug threads and progressed through approximately one fifth of the crank circumference. Interviews with personnel involved with the installation revealed they had retorqued the propeller, but had not followed accepted industry practices in establishing proper hub to rear cone contact surfaces.
Quoted verbatim from the NTSB record.
Other Waco YMF5 accidents
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 24 Oct 1996 | Waco YMF5 | Punta Gorda, Florida, United States | Stephen E. Raville | No injuries | - |
| 6 Aug 2021 | Waco YMF5-C | Yvoy-le-Marron, France | - | Serious injuries | - |
Other accidents in this area
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 10 Apr 1997 | Cessna 152 | La Crosse, Florida, United States | - | No injuries | - |
| 10 Apr 1997 | Navion A | Quincy, Florida, United States | - | No injuries | - |
| 13 Apr 1997 | Diamond DA 20-A1 | Hollywood, Florida, United States | Pelican Airways | No injuries | - |
| 15 Jul 1997 | Cessna 172N | Lakeland, Florida, United States | - | No injuries | - |
| 18 Apr 1997 | Cessna 150M | Ormond Beach, Florida, United States | - | No injuries | - |
| 19 Jul 1997 | Bellanca 8GCBC | Bunnell, Florida, United States | - | Minor injuries | - |