ASN Wikibase Occurrence # 314622
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| Date: | Monday 12 July 2010 |
| Time: | 13:28 LT |
| Type: |  Bell 206 |
| Owner/operator: | Rotorcraft Leasing Company LLC |
| Registration: | N523RL |
| MSN: | 52321 |
| Year of manufacture: | 2005 |
| Total airframe hrs: | 4399 hours |
| Engine model: | Allison 250 |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Minor |
| Category: | Serious incident |
| Location: | Gulf of Mexico, Louisiana -
 United States of America
|
| Phase: | Standing |
| Nature: | Unknown |
| Departure airport: | Gulf of Mexico, LA |
| Gulf of Mexico, LA | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
According to the pilot, the helicopter was on final approach to a platform in the Gulf of Mexico when he raised the collective to perform a go-around. However, the helicopter did not respond properly; rather, its performance and torque indications remained fixed at 45 percent. The pilot began a slow climb and diverted to a land-based airport at a cruise speed of about 60 knots. Because of a complete loss of collective pitch control, the pilot made a running landing on the runway at the airport, touching down about 45 knots. The helicopter came to a stop in the grass about 100 feet past the end of the runway. An examination of the helicopter revealed that several fasteners were missing from the top clevis of the collective control tube, which led to the control tube becoming disconnected from the collective pitch arm on the swash plate. The missing fasteners were found loose on the deck in the transmission compartment. Records showed that maintenance to reinstall the transmission and main rotor hub had been completed about 6 flight hours before the incident and that several mechanics and two pilots had examined the helicopter before the incident flight without noting the improperly secured/missing fasteners.
Probable Cause: Improper reassembly of the collective flight controls by maintenance personnel. Contributing to the incident were inadequate postmaintenance examinations by maintenance personnel and inadequate preflight inspections by two pilots.
Accident investigation:
 |
|
Sources:
NTSB CEN10IA397
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 02-Jun-2023 19:00 | ASN Update Bot | Added |
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