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ASN Wikibase Occurrence # 225991
Last updated: 27 November 2021
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Date:16-JUN-2018
Time:17:00
Type:Silhouette image of generic H500 model; specific model in this crash may look slightly different
MD Helicopters MD530F (369FF)
Owner/operator:Northwest Helicopters LLC
Registration: N900FF
MSN: 0100FF
Fatalities:Fatalities: 0 / Occupants: 1
Other fatalities:0
Aircraft damage: Substantial
Category:Accident
Location:Yabucoa, PR -   Puerto Rico
Phase: Manoeuvring (airshow, firefighting, ag.ops.)
Nature:Cargo
Departure airport:Palmas Del Mar, PR
Destination airport:Yabucoa, PR
Investigating agency: NTSB
Narrative:
According to the helicopter pilot, he dropped off a lineman on top of a power line tower to install fiber lines. The lineman completed the task and informed the pilot by radio that he was ready to be picked up from the tower. While picking up the lineman, the pilot hovered next to the tower and signaled to the lineman that he was ready for him to transfer from the tower to the helicopterís left skid. When the lineman reached out to attach his lanyard to the helicopter, the pilot felt the main rotor blades strike a fiber line that the lineman had just installed. The helicopter became controllable, and the pilot conducted a precautionary landing without picking up the lineman. After the pilot discussed the event with the lineman, the lineman raised the fiber line to a higher position on the tower and then the pilot picked him up.
Postaccident examination of the helicopter revealed that the main rotor blades sustained substantial damage.
The pilot reported that the accident could have been prevented by assessing each approach and landing individually while looking for any possible new hazards or obstructions.
The pilot reported that there were no mechanical malfunctions or failures with the helicopter that would have precluded normal operation.

Probable Cause: The pilot's failure to maintain main rotor clearance from a fiber line while picking up a lineman.

Sources:

NTSB

Accident investigation:
cover
  
Investigating agency: NTSB
Status: Investigation completed
Duration: 11 months
Download report: Final report


Revision history:

Date/timeContributorUpdates
10-Jun-2019 06:45 ASN Update Bot Added
10-Jun-2019 15:47 harro Updated [Country, Phase, Narrative]

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