ASN Wikibase Occurrence # 314406
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| Date: | Tuesday 22 May 2012 |
| Time: | 13:30 LT |
| Type: |  Eurocopter AS 350 B2 |
| Owner/operator: | King Broadcasting Co |
| Registration: | N105TV |
| MSN: | 2279 |
| Year of manufacture: | 1989 |
| Total airframe hrs: | 11501 hours |
| Engine model: | Turbomeca ARRIEL 1D1 |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Minor |
| Category: | Serious incident |
| Location: | Seattle, Washington -
 United States of America
|
| Phase: | Standing |
| Nature: | Unknown |
| Departure airport: | Seattle-Boeing Field International Airport, WA (BFI/KBFI) |
| Seattle, WA | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot reported that he had just entered a slow orbit when the helicopter experienced what he described as a severe vibration. The vibration was continuous and so severe that the pilot diverted to a nearby airport and landed. Postincident examination of the helicopter revealed that one of the tail rotor pitch change link bolts (to the pitch arm) was missing. The incident flight followed a 100-hour maintenance inspection that concluded earlier that day. The inspection included maintenance and service to the tail rotor assembly. The pilot reported that the pitch change link bolt (to pitch arm) was not correctly tightened and secured while in maintenance and subsequently loosened and released during the flight.
Probable Cause: Failure of maintenance personnel to ensure that the tail rotor pitch change link bolt was properly secured, which resulted in an in-flight separation of the bolt and subsequent vibration.
Accident investigation:
 |
|
Sources:
NTSB WPR12IA248
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 02-Jun-2023 17:11 | ASN Update Bot | Added |
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