ASN Wikibase Occurrence # 26469
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| Date: | Saturday 28 September 1996 |
| Time: | 09:35 LT |
| Type: |  Mitsubishi MU-2B-30 |
| Owner/operator: | Air-hi-o Corp |
| Registration: | N618BB |
| MSN: | 533 |
| Year of manufacture: | 1971 |
| Total airframe hrs: | 6644 hours |
| Engine model: | Garrett TPE-331-1-151 |
| Fatalities: | Fatalities: 0 / Occupants: 4 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Ross County Airport, OH -
 United States of America
|
| Phase: | Initial climb |
| Nature: | Unknown |
| Departure airport: | (KRZT) |
| Columbus, OH (KOSU) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The Pilot (plt) said that after climbing about 500' after takeoff, at 120 kts with the gear retracted, the left engine lost power. He feathered the propeller, lowered the nose to the horizon, & began a shallow left turn back to the airport. He left the flaps at 20 deg & noted a descent of 200' to 300' per min in the turn. After clearing trees, the plt extended the landing gear, banked the aircraft (acft) to the right to align it with the runway (rwy), & lowered flaps to 40 deg. After touchdown, he applied single engine reversing. Acft went off right side of rwy & into a ditch, collapsing the right main & nose gear. Exam of the engine revealed the torque sensor housing had failed, resulting in loss of drive to the fuel pump. Metallurgical exam of the housing arm of the torque sensor revealed it had failed from fatigue. On 9/14/79, a service bulletin (SB) was issued for replacement of the torque sensor housing with an improved housing. The manufacturer overhauled the engine on 12/1179, but SB was not complied with. SB indicated a history of resonant vibration causing cracks in the housing arm of original torque sensor & gear assemblies, & that the housing should be replaced, no later than during next part exposure. Investigation revealed pilot did not comply with engine failure procedures & airspeeds. Flight manual cautioned not to use 40 deg of flaps during single engine landings.
Probable Cause: failure of the pilot to follow the published emergency procedures after loss of power in the left engine. Factors relating to the accident were: fatigue failure of the left torque sensor and gear assembly, which resulted in the loss of engine power, failure of the manufacturer to comply with the respective service bulletin, and the pilot's improper use of the flaps and reverse (single-engine) thrust.
Accident investigation:
 |
|
Sources:
NTSB NYC96LA188
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 27-Sep-2008 01:00 | ASN archive | Added |
| 17-Jan-2011 14:22 | Anon. | Updated [Phase, Nature, Departure airport, Destination airport, Source, Damage, Narrative] |
| 06-Mar-2016 23:12 | Dr.John Smith | Updated [Time, Operator, Location, Departure airport, Destination airport, Source, Narrative] |
| 08-Dec-2016 16:13 | wf | Updated [Damage] |
| 21-Dec-2016 19:14 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 21-Dec-2016 19:16 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 21-Dec-2016 19:20 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 20-May-2017 18:13 | TB | Updated [Location, Source, Narrative] |
| 08-Apr-2024 18:47 | ASN Update Bot | Updated [Time, Operator, Other fatalities, Nature, Departure airport, Destination airport, Source, Narrative, Category, Accident report] |
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