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NTSB investigations: Allison 250 SER 400HP, 1982

7 cases on aircraft whose registry engine model is Allison 250 SER 400HP. Aircraft are matched to the registry by N-number and event date, checked against the reported serial number, make and model, so older matches can be wrong.

Cases per year

19692026

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Query with SQL
duckdb -csv -c "SELECT c.\"ntsbNumber\", c.\"eventDate\", c.\"eventType\", c.\"eventCity\", c.\"eventStateOrRegion\", a.n_number, a.\"aircraftMake\", a.\"aircraftModel\", c.\"highestInjuryLevel\", c.\"totalFatal\", c.\"completionStatus\", c.report_url
  FROM 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' c LEFT JOIN 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' a ON a.case_mkey = c.\"mKey\" AND a.position = 1
  WHERE year(c.\"eventDate\") = 1982
    AND c.\"mKey\" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('03013', '03012'))
  ORDER BY c.\"eventDate\" DESC, c.\"ntsbNumber\" DESC"

Prints the whole list as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.

NTSB ATL82DA257Accident · No injuriesFinal reportBell 206L · Greenville, SCThe pilot reported that he was making an approach to a new helipad that was still under construction when he felt a severe vibration. After landing and shutdown, he discovered that the tail rotor had struck the glass cover of a heliport perimeter light.Aug 30, 1982 · N403DC · Substantial damageNTSB FTW82DA323Accident · Serious injuriesFinal reportBell 206B · Grand Isle, LAThe pilot was approaching an offshore platform for landing at about 100 ft AGL when he felt the helicopter shudder. He also heard an engine-out horn and a low-rotor-rpm warning. He turned away from the platform, popped the emergency floats and initiated an…Aug 8, 1982 · N59504 · DestroyedNTSB ANC82DA039Accident · No injuriesFinal reportHughes 369HS · Tok, AKThe pilot was conducting a non-revenue, sling-load operation on mt neuberer, while donating his services to Tok community tv, inc. he stated that he was lifting three empty propane bottles from a snow field when he noticed the auto relight lamp flash. He…May 4, 1982 · N9239F · Substantial damageNTSB SEA82DA055Accident · No injuriesFinal reportHughes 500C · Darrington, WADuring an approach to a 9100 foot high snow covered landing site the wind shifted to a tailwind condition. The pilot elected to continue and attempted a skid on landing. While skidding through the snow the left skid impacted rising terrain underneath a 12…Apr 19, 1982 · N9131F · Substantial damageNTSB LAX82DA140Accident · 3 fatalFinal reportHughes 369HS · 8 S. Of Page, AZThe aircraft was number two in a trail of three helicopters flying up the Colorado river at marble canyon to page, AZ when it struck an aerial cableway stretching across the river, 22 ft above the water. Witnesses stated that after the collision the…Apr 18, 1982 · N4EE · DestroyedNTSB FTW82DA075Accident · 2 fatalFinal reportBell 206B · High Island BlkThe aircraft was low on the approach and during the flare, the vertical fin and tail boom contacted the safety netting extending beyond the boundaries of the platform landing area. The aircraft then settled back off the platform with one main rotor blade…Mar 2, 1982 · N63AL · DestroyedNTSB DEN82DA037Accident · No injuriesFinal reportBell 206B III · Alma, COThe pilot reported that before the accident, the flight had been uneventful and all instruments were reading normal except the tot gauge. Reportedly, it was indicating 750 degrees, which was about 100 degrees higher than normal for his power setting of 70%…Mar 1, 1982 · N580P · Substantial damage