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N491SA — 2009 Robinson Helicopter Company R44 II | Aircraft History & Risk Profile

Robinson Helicopter Company R44 II · LYCOMING IO-540-AE1A5 · S/N 12831

Registered owner: SHIER AVIATION CORP DBA (California) · Registry status: Valid · Current certificate issued 2009

0 NTSB accident / incident records
17 FAA service difficulty reports
0 open airworthiness directives
2009 last registration change (FAA proxy)

N491SA is a 2009 Robinson Helicopter Company R44 II currently registered in California does not appear in any NTSB investigation since 2008, and 17 FAA Service Difficulty Reports reference this airframe. No open airworthiness directive is currently matched to this model. Its current registration certificate was issued in 2009, the only ownership marker the FAA publishes in bulk.

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What the full report unlocks

  • Risk score 0–100 with the four sub-scores explained
  • Every NTSB event in detail — verified against the airframe serial
  • All 17 SDRs grouped by aircraft system, benchmarked vs. the Robinson R44 fleet
  • Open AD list with compliance summaries, red flags, methodology & sources
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