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Atlas / NTSB / WPR24LA092

NTSB CAROL · Event

Event WPR24LA092

2023-12-05 Calexico, California, United States Airport · CXL None 1 aircraft Status: Completed

Registry · N422DX

FAA Aircraft Registry record.

Make / Model

ROBINSON HELICOPTER R44 II

Year of manufacture

2009 · 14 years old at event

TCDS

H11NM · ROBINSON HELICOPTER CO

Engine

LYCOMING IO-540-AE1A5 (260 hp)

Seats / Engines

4 seats · 1 engine

Last airworthiness date

20090513

ADS-B equipped

Yes — Mode-S A5036E

Registrant of record

MERTEN AVIATION SERVICES LLC

Source: FAA Aircraft Registry (releasable master file).

Aircraft involved

Probable cause & findings

The pilot's failure to maintain clearance from power lines during an aerial application flight.

Factual narrative

The pilot was on an aerial application flight and was maneuvering the helicopter at a low altitude. During a decent to a field, the main rotor blade struck a powerline wire. The pilot felt an unusual vibration and performed a precautionary landing. A postflight examination revealed that a main rotor blade sustained substantial damage. No preaccident mechanical failures or malfunctions with the helicopter that would have precluded normal operation were reported. Source: NTSB Aviation Accident Database Retrieved: 2026-02-12

NTSB Findings

Hierarchical cause / factor breakdown from the FAA bulk avdata database. Each finding tagged C (Cause) or F (Factor).

  • Personnel issues-Psychological-Attention/monitoring-Monitoring environment-Pilot
  • Environmental issues-Physical environment-Object/animal/substance-Wire-Effect on equipment

Verbatim from NTSB's published report. Source file NTSB_2023_WPR24LA092.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.