ASN Wikibase Occurrence # 177746
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| Date: | Sunday 12 July 2015 |
| Time: | 10:10 |
| Type: |  Cessna 210-5A (205A) |
| Owner/operator: | Skydive East Coast |
| Registration: | N315EC |
| MSN: | 2050494 |
| Year of manufacture: | 1963 |
| Total airframe hrs: | 7237 hours |
| Engine model: | Continental IO-520-FCA |
| Fatalities: | Fatalities: 0 / Occupants: 5 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Stafford Township, NJ -
 United States of America
|
| Phase: | Landing |
| Nature: | Parachuting |
| Departure airport: | West Creek, NJ (31E) |
| West Creek, NJ (31E) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot reported that the accident flight was his second skydiving flight of the morning and that the airplane was performing “normally” as it had during the first flight. During climbout, he noted that the engine cylinder head temperatures were in the “normal” range. When the airplane reached about 4,000 ft mean sea level, the engine experienced a total loss of power, and, about 1 minute later, the propeller stopped windmilling. The pilot conducted an off-airport landing to a nearby highway. During the landing roll, and to avoid impacting vehicles on the highway, the pilot guided the airplane onto the median, and the wings and horizontal stabilizer impacted several road signs, which resulted in substantial damage to the airplane.
Disassembly and examination of the engine revealed that the crankshaft was fractured near the No. 2 main bearing. The No. 2 main bearing saddle mating surface exhibited extensive fretting, and the areas adjacent to the No. 2 bearing on the inside of the engine case exhibited rotational scoring, indicating that bearing movement had occurred before the crankshaft failure and that insufficient torque had been applied to the cylinder through bolts. Review of the maintenance logbooks revealed that, 19 days before the accident, a mechanic replaced the No. 2 cylinder. It is likely that the mechanic applied insufficient torque to the through bolts after replacing the No. 2 cylinder, which allowed the bearings to move and led to the eventual failure of the crankshaft.
Probable Cause: The total loss of engine power due to the failure of the crankshaft, which resulted from a mechanic's failure to properly torque the engine cylinder through bolts.
Accident investigation:
 |
|
Sources:
NTSB
FAA register: http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=315EC
Location
Media:
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 12-Jul-2015 16:36 | Geno | Added |
| 12-Jul-2015 16:38 | Geno | Updated [Aircraft type, Narrative] |
| 12-Jul-2015 20:11 | Geno | Updated [Total occupants, Nature, Narrative] |
| 13-Jul-2015 08:52 | harro | Updated [Aircraft type] |
| 15-Jul-2015 12:48 | Aerossurance | Updated [Source, Embed code] |
| 21-Dec-2016 19:30 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 01-Dec-2017 15:03 | ASN Update Bot | Updated [Cn, Operator, Other fatalities, Departure airport, Destination airport, Source, Narrative] |
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