# NTSB SEA84LA199: Rockwell Thrush SR2, N5553X, Nampa, ID, August 14, 1984

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: August 14, 1984, 08:30 local (14:30 UTC)
- Place: Nampa, ID
- Coordinates: 43.60046, -116.609321 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=43.6005&lon=-116.6093&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 39989
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA84LA199
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/39989/pdf
- Page: https://openairdocs.org/ntsb/SEA84LA199

## Sequence of events

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- Loss of engine power(partial) - mech failure/malf, maneuvering - aerial application
  - throttle/power lever,bellcrank - failure,partial (cause)
- Forced landing, descent - emergency
  - load jettison - performed, pilot in command (contributing factor)
  - throttle/power control - inadvertent deactivation, pilot in command (cause)
- In flight collision with terrain/water, landing
  - terrain condition - crop
  - terrain condition - soft

## Analysis

THE ACFT BEGAN TO LOSE POWER WHILE ENGAGED IN AERIAL APPLICATION SO THE PLT DUMPED HIS LOAD AND HEADED FOR THE AIRSTRIP.ENROUTE THE POWER DETERIORATED SO THE PLT ELECTED TO LAND. CUTTING THE MIXTURE GAVE THE ENGINE A SURGE WHICH CAUSED AN OVERSHOOT INTO STANDING CORN.  THE CAUSE OF THE POWER LOSS WAS FOUND TO BE A FAILED THROTTLE BOLT.

## Aircraft

- Registration: [N5553X](https://openairdocs.org/deregistered/N5553X-2021-12-17), registration cancelled 2021-12-17, S/N 1753R, built 1973 (OpenAirDocs)
- Reported make and model: ROCKWELL THRUSH SR2
- Registry model: [Aero Commander S2R](https://openairdocs.org/model/aero-commander-s2r) (registry code 0143022) (OpenAirDocs)
- Registry engine: [Pratt & Whitney R1340 series](https://openairdocs.org/engine/pratt-whitney-r1340-series) (registry code 52016, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 1753R
- Airframe hours: 4658
- Engines: P&W R-1340-AN-1 600 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Registered owner: William And Gary Hubler
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: Annual, April 11, 1984
- Departed: NAMPA, ID
- Destination: NAMPA, ID
- Airport: 64U, Hubler Field

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 36; commercial; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; seat: center; flight hours: 3,246 total, 1,245 in this make and model, 245 in the last 90 days, 6 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 200° at 5 knots
- Visibility: 25 statute miles
- Lowest ceiling: none
- Temperature: 68 °F

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 19840814040449A](https://openairdocs.org/incident/19840814040449A), Aug 14, 1984: Ayres S2RRESTD, Nampa, ID, Substantial damage. Lost partial power. Nosed over on the forced landing. Throttle bolt had falled disconnecting the throttle.

## Other investigations on N5553X (2)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB CEN18LA278](https://openairdocs.org/ntsb/CEN18LA278), Jul 17, 2018: Aero Commander S2R (N5553X), Vinton, IA, substantial damage. Probable cause: Loss of throttle control input due to a failure in the throttle control system. Contributing to the accident was the inadequate inspection and reinstallation of worn parts by maintenance personnel.
- [NTSB SEA74FYA02](https://openairdocs.org/ntsb/SEA74FYA02), Jul 7, 1973: Aero Comdr 600S2R (N5553X), Homedale, ID, substantial damage

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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