ASN Wikibase Occurrence # 184466
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| Date: | Friday 30 October 2015 |
| Time: | 12:20 |
| Type: |  Bell 407 |
| Owner/operator: | PHI Inc. |
| Registration: | N420PH |
| MSN: | 53747 |
| Year of manufacture: | 2007 |
| Total airframe hrs: | 9015 hours |
| Engine model: | Rolls-Royce 250-C47B |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Offshore Installation West Cameron (WC) 167, GOM -
 United States of America
|
| Phase: | Standing |
| Nature: | Offshore |
| Departure airport: | Cameron, LA (149) |
| Cameron, LA (167) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The operator reported that the pilot landed and shutdown the helicopter on an offshore platform. He secured the main rotor system by attaching a tiedown to the forward left main rotor blade and he then attached this tiedown to the left front skid cross tube. Several hours later, the pilot entered the right front seat to begin the engine start sequence. The operator reported that the pilot proceeded to start the engine and noted a few seconds after initiating the engine start that the helicopter made an "unusual noise" and began to shake. The pilot then shut down the helicopter without further incident. A postflight inspection revealed substantial damage to the blue main rotor blade.
The operator reported there were no pre-impact mechanical failures or malfunctions with the airframe or engine that would have precluded normal operation.
Probable Cause: The pilot's failure to remove a main rotor blade tiedown, which resulted in substantial damage to a main rotor blade when the engine was started.
Accident investigation:
 |
|
Sources:
NTSB
FAA register: http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?nNumberTxt=420PH
http://aerossurance.com/helicopters/troublesome-tie-downs/
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 13-Feb-2016 13:21 | Aerossurance | Added |
| 22-Sep-2016 10:17 | Aerossurance | Updated [Source, Narrative] |
| 21-Dec-2016 19:30 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 01-Dec-2017 15:29 | ASN Update Bot | Updated [Operator, Other fatalities, Departure airport, Destination airport, Source, Narrative] |
| 05-Apr-2021 12:38 | Aerossurance | Updated [Source] |
Corrections or additions? ... Edit this accident description
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