# NTSB investigations: Rockwell International S-2R: Loss of engine power(partial) - mech failure/malf

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 FTW04LA176](https://openairdocs.org/ntsb/FTW04LA176.md): Rockwell S-2R · Jonesville, LA · Accident · Minor injuries · Limited investigation · Final report · Jul 6, 2004 · N8486V · Substantial damage
  > The pilot's failure to maintain clearance with the power lines.
- [NTSB FTW99LA247](https://openairdocs.org/ntsb/FTW99LA247.md): Rockwell S-2R · Lookeba, OK · Accident · No injuries · Limited investigation · Final report · Sep 6, 1999 · N4919X · Destroyed
  > The loss of engine power resulting from a cylinder that failed for an undetermined reason.
- [NTSB FTW97LA322](https://openairdocs.org/ntsb/FTW97LA322.md): Rockwell S-2R · Columbus, NM · Accident · Serious injuries · Limited investigation · Final report · Aug 21, 1997 · N4893X · Substantial damage
  > a loss of engine power due to failure of an exhaust side rocker box and valve mechanism, and pilot incapacitation due to loss of consciousness after being struck in the head by parts separating from the engine.
- [NTSB MIA95LA181](https://openairdocs.org/ntsb/MIA95LA181.md): Rockwell S-2R · Lambert, MS · Accident · Minor injuries · Limited investigation · Final report · Jul 11, 1995 · N8440V · Destroyed
  > Unsuitable terrain encountered during the forced landing. Contributing to the accident was the partial loss of engine power due to failure of the no. 4 cylinder intake valve rocker arm bosses.
- [NTSB LAX95LA064](https://openairdocs.org/ntsb/LAX95LA064.md): Rockwell S2R Thrush Cmdr · Yuma, AZ · Accident · No injuries · Limited investigation · Final report · Dec 29, 1994 · N8455V · Substantial damage
  > a forced landing due to an engine failure of the no.1 cylinder.
- [NTSB FTW94LA238](https://openairdocs.org/ntsb/FTW94LA238.md): Rockwell S-2R · Winchester, AR · Accident · Serious injuries · Limited investigation · Final report · Jul 15, 1994 · N4903X · Substantial damage
  > The loss of power due to the number one cylinder head cracking. A factor was the lack of suitable terrain for the forced landing.
- [NTSB ATL88DKG15](https://openairdocs.org/ntsb/ATL88DKG15.md): Rockwell S2R · Pelham, GA · Accident · Minor injuries · Final report · Aug 30, 1988 · N4887X · Destroyed
  > The crop duster had completed the third swath run of the morning when the engine began to lose power. The plt released the contents of the hopper and made a forced landing in a soybean field. During the landing roll, the airplane nosed over and a ground fire…
- [NTSB MKC87LA115](https://openairdocs.org/ntsb/MKC87LA115.md): Ayres S2R600 · Lepanto, AR · Accident · No injuries · Limited investigation · Final report · Jun 2, 1987 · N4943X · Substantial damage
  > The PIC had taken off for a LCL aerial operation. Enroute PIC had an engine failure and made a forced ldg in a muddy field. PIC applied brakes and acft nosed over. The exhaust rocker arm box on no. 3 cylinder was found to be cracked keeping exhaust valve in…
- [NTSB LAX85LA250](https://openairdocs.org/ntsb/LAX85LA250.md): Rockwell S-2R · Colusa, CA · Accident · No injuries · Limited investigation · Final report · May 9, 1985 · N8929Q · Substantial damage
  > During an ag flight, the eng began to severly backfire & lose power. The plt attempted to make a forced ldg on the nearby duster airstrip but had insufficient altitude to be properly aligned with the rwy. The acft overan the edge of the end disclosed that its…
- [NTSB MKC85LA033](https://openairdocs.org/ntsb/MKC85LA033.md): Rockwell S-2R · West Helena, AR · Accident · No injuries · Limited investigation · Final report · Dec 8, 1984 · N8503V · Substantial damage
  > On departing West Helena arpt the plt reduced pwr to a cruise pwr setting. The engine responded to the pwr reduction but then the torque dropped to zero. The acft descended striking the ground. Inspection and testing of the engine and fuel control unit did…
- [NTSB FTW83LA358](https://openairdocs.org/ntsb/FTW83LA358.md): Rockwell S2R · Eudora, AR · Accident · No injuries · Limited investigation · Final report · Aug 1, 1983 · N4903X · Substantial damage
  > While dispensing fertilizer, oil suddenly covered the windshield & the eng began running at reduced power. The plt made an emergency landing in a water covered rice field where the wheels hit a levee & the acft nosed over. An exam revealed that the #1 exhaust…

## 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 c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.aircraft_model_code IN ('7630202', '7630205')
    AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_occurrences.parquet' o WHERE o.case_mkey = x.case_mkey AND o.aircrafts_position = x.position AND o."occurrenceNumber" = 1 AND o."occurrenceCode" = 352))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?model=7630202&occurrence=352

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