ASN Wikibase Occurrence # 179489
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| Date: | Monday 5 July 2004 |
| Time: | 11:15 |
| Type: |  Cessna T210N |
| Owner/operator: | PinesAir, Inc. |
| Registration: | N5408A |
| MSN: | 21063419 |
| Year of manufacture: | 1979 |
| Total airframe hrs: | 5435 hours |
| Engine model: | Continental TSIO-520-L |
| Fatalities: | Fatalities: 0 / Occupants: 4 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | 8 miles west of Spanish Fork, Utah -
 United States of America
|
| Phase: | Landing |
| Nature: | Private |
| Departure airport: | Provo, UT (PVU) |
| Kimball, NE (IBM) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot made a intentional wheels up landing after first experiencing a low voltage light followed by a loss of engine power. The examination of the engine revealed the number 2 bearing and crankshaft had shifted forward with subsequent failure of the alternator drive shaft and other accessories, as well as, damage to other components of the power drive train. Examination of the aircraft revealed the adhesive (Permatex) for the crankcase seam string was also applied on the crankcase halves surfaces, inside the seam face, and on the through bolts. According to the manufacturer, the adhesive should only be applied to hold the string in place. The excess sealant contributed to either the loss of torque or under-torquing of the through-bolts. The engine had 3692 hours tachometer time when it was overhauled in 1993 when the time between overhaul was extended to 1600 hours. In 2000, the engine had accumulated 1108 hours since the overhaul, when six new, "classic cast" cylinder assemblies, along with new pistons, rings, and piston pins, were installed. In order for this work to have been accomplished, the crankcase would have had to been separated. At the time of the accident, the engine had 5435 hours tachometer time at and 1743 hours since the overhaul.
Probable Cause: the improper reassembly of the engine following major overhaul (application of Permatex over entire crankcase surfaces). Contributing factors included the number 2 main bearing and crankshaft shifting forward, causing the alternator drive shaft and other accessory gears to fail, which disabled the camshaft.
Accident investigation:
 |
|
Sources:
NTSB: https://www.ntsb.gov/_layouts/ntsb.aviation/brief.aspx?ev_id=20040708X00934&key=1
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 11-Sep-2015 16:23 | Noro | Added |
| 21-Dec-2016 19:30 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 07-Dec-2017 18:11 | ASN Update Bot | Updated [Operator, Other fatalities, Departure airport, Destination airport, Source, Narrative] |
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