# NTSB investigations: Lycoming IO-540-AE1A5, 2019

NTSB aviation accident and incident investigations since 1962: the probable cause, findings, aircraft, crew, weather and docket of each, linked to the FAA registry and the FAA’s own reports.

## Latest cases

- [NTSB ERA20LA054](https://openairdocs.org/ntsb/ERA20LA054.md): Robinson R44 · San Antonio, TX · Accident · Minor injuries · Class 3 · Limited · Final report · Dec 14, 2019 · N440AH · Substantial damage
  > Maintenance personnel’s failure to complete all necessary steps of a service bulletin and subsequent failure to identify the loose lower actuator bearing support bracket during inspections, which resulted in the misalignment of the clutch actuator, resulted…
- [NTSB GAA19CA531](https://openairdocs.org/ntsb/GAA19CA531.md): Robinson R44 · Nuiqsut, AK · Accident · No injuries · Data collection · Final report · Sep 6, 2019 · N447PA · Substantial damage
  > The pilot's improper decision to land downwind from unsecured debris, which resulted in the helicopter’s main rotor disk ingesting foreign objects.
- [NTSB CEN19LA250](https://openairdocs.org/ntsb/CEN19LA250.md): Robinson Helicopter R44 II · Lyons, NE · Accident · Minor injuries · Class 3 · Limited · Final report · Aug 3, 2019 · N440EM · Substantial damage
  > The engine's low cylinder compression, which resulted in low rotor rpm and a subsequent dynamic rollover following landing on soft terrain.
- [NTSB GAA19CA473](https://openairdocs.org/ntsb/GAA19CA473.md): Robinson R44 · Fessenden, ND · Accident · Minor injuries · Data collection · Final report · Jul 31, 2019 · N3066T · Substantial damage
  > The pilot's failure to maintain clearance from wires during an agricultural application flight.
- [NTSB CEN19LA240](https://openairdocs.org/ntsb/CEN19LA240.md): Robinson R44 · Blair, NE · Accident · Minor injuries · Class 3 · Limited · Final report · Jul 27, 2019 · N7508Z · Substantial damage
  > The failure of the lower actuator bearing support bracket, which resulted in the misalignment of the clutch actuator, the loss of belt tension on the main rotor drive system, and the subsequent forced landing on sloped terrain.
- [NTSB GAA19CA428](https://openairdocs.org/ntsb/GAA19CA428.md): Robinson R44 · Council Bluff, IA · Accident · Minor injuries · Data collection · Final report · Jul 16, 2019 · N124LA · Substantial damage
  > The pilot's improper cyclic input during liftoff from a landing deck, which resulted in the right skid hooking onto an opening on the landing deck and a subsequent dynamic rollover.
- [NTSB ERA19TA204](https://openairdocs.org/ntsb/ERA19TA204.md): Robinson R44 · Parsons, WV · Accident · Serious injuries · Class 3 · Final report · Jun 29, 2019 · N883TY · Substantial damage
  > The pilot's decision to maneuver the helicopter at low altitude over a river, which resulted in a wire strike and subsequent collision with terrain.
- [NTSB CEN19TA178](https://openairdocs.org/ntsb/CEN19TA178.md): Robinson R44 · La Ward, TX · Accident · No injuries · Class 3 · Final report · Jun 21, 2019 · N445AP · Substantial damage
  > The pilot’s failure to maintain helicopter control during a course reversal, which resulted in impact with terrain.
- [NTSB GAA19CA476](https://openairdocs.org/ntsb/GAA19CA476.md): Robinson R44 · Lebanon, MO · Accident · No injuries · Data collection · Final report · Jun 9, 2019 · N724H · Substantial damage
  > The pilot's loss of yaw control and failure to maintain a proper descent rate and his subsequent improper use of the collective instead of the antitorque pedals to correct the yaw, which resulted in a hard landing.
- [NTSB CEN19LA162](https://openairdocs.org/ntsb/CEN19LA162.md): Robinson R44 · Last Chance, CO · Accident · Minor injuries · Class 3 · Limited · Final report · Jun 8, 2019 · N4504L · Substantial damage
  > The pilot's failure to maintain adequate main rotor rpm while descending with a tailwind during an aerial application maneuver, which resulted in an uncontrolled descent into terrain.
- [NTSB CEN19FA160](https://openairdocs.org/ntsb/CEN19FA160.md): Robinson R44 · Cass, AR · Accident · 3 fatal · Class 3 · Field · Final report · Jun 3, 2019 · N41351 · Substantial damage
  > A loss of engine power for reasons that could not be determined based on the available information.
- [NTSB ERA19FA142](https://openairdocs.org/ntsb/ERA19FA142.md): Robinson R44 II · Tampa, FL · Accident · 1 fatal · Field investigation · Final report · Apr 4, 2019 · N4046J · Substantial damage
  > Contamination of and an inadequate bond between the two layers of fabric comprising the helicopter engine's air induction inlet duct, which resulted a partial collapse of the duct, obstruction of the airflow into the engine, and a total loss of engine power.
- [NTSB CEN19LA065](https://openairdocs.org/ntsb/CEN19LA065.md): Robinson R44 · Uvalde, TX · Accident · Minor injuries · Limited investigation · Final report · Jan 8, 2019 · N484AB · Substantial damage
  > The slipping of the sprag clutch due to galling of the sprags and corresponding sprag contact surfaces within the clutch assembly, which rendered the helicopter uncontrollable.
- [NTSB GAA19CA110](https://openairdocs.org/ntsb/GAA19CA110.md): Robinson R44 · Grace, ID · Accident · No injuries · Data collection · Final report · Jan 3, 2019 · N4246Z · Substantial damage
  > The pilot's failure to maintain clearance from the power lines.

## The whole list in SQL

Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS:

```sql
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") = 2019
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('41899'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=41899&year=2019

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OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.