# Accident 19980709024399A: Ayres S2R, Pasco, WA, July 9, 1998

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: July 9, 1998, 10:00 local time
- Place: Pasco, WA
- Damage: Substantial damage
- Phase of flight: Forced/Precautionary Landing
- Operating rules: Agricultural (Part 137)
- Operator: WZKG
- Location: 46.4092° N, 118.8998° W: From the FAA, an estimate near the named town, within about 3 miles
- Nearby events: https://openairdocs.org/map.md?lat=46.4092&lon=-118.8998&mi=10
- Aircraft: N4996X, a cancelled registration (https://openairdocs.org/deregistered/N4996X-2012-02-07) (OpenAirDocs)
- Registry model: Rockwell International S-2R (registry code 7630202, https://openairdocs.org/model/rockwell-international-s-2r) (OpenAirDocs)
- Registry engine: Pratt & Whitney R1340 series (registry code 52016, https://openairdocs.org/engine/pratt-whitney-r1340-series) (OpenAirDocs)
- Reported make and model: AYRES S2R
- Reported engine: PWA R1340*
- People aboard: 1
- Fatal injuries: 0
- Pilot flight hours: 15,000 total, 8,000 in this make and model, 350 in the last 90 days
- NTSB investigation: [NTSB SEA98LA125](https://openairdocs.org/ntsb/SEA98LA125) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19980709024399A

## Narrative

As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^.

LOST POWER ON LIFTOFF. DUMPED LOAD LANDED POTATO FIELD. NOSED OVER. THROTTLE CONNECTOR WORN OUT FAILED. (.4)THE PILOT REPORTED THAT WHILE TAKING OFF TO THE WEST AND CLIMBING THROUGH ABOUT 40 FEET ABOVE GROUND, THE ENGINE WENT TO IDLE. HE STATED THAT HE DROPPED HIS CHEMICAL LOAD AND IMMEDIATELY LANDED IN AN OPEN POTATO FIELD. THE LANDING ROLL WAS CROSSWISE TO THE FURROWS AND THE AIRCRAFT ULTIMATELY NOSED OVER.  FAA ON-SITE INSPECTION  REVEALED A DISCONNECT OF THE THROTTLE LINKAGE JUST FORWARD OF THE FIREWALL WHERE IT ATTACHES TO A 90 DEGREE BELL-CRANK DESIGNED TO TRANSLATE FORWARD/AFT MOTION INTO LEFT/RIGHT LATERAL MOTION. THE THREADS ON THE BELL-CRANK ATTACH END OF THE LONGITUDINAL THROTTLE TUBE WERE FOUND TO BE HEAVILY WORN.                                            (-23)AIRCRAFT LOST POWER ON TAKE-OFF, DUMPED LOAD, AND LANDED STRAIGHT AHEAD I POTATO FIELD.  THE AIRCRAFT NOSED OVER AND CAME TO REST ON ITS TOP.  THE AIRCRAFT LANDED GOING ACROSS THE POTATO ROWS INSTEAD OF PARALLEL TO THEM CONTRIBUTING TO THE NOSING OVER.  THE AIRCRAFT SUSTAINED DAMAGE TO THE FIN, THE TOP OF THE CABIN, A BENT PROPELLER BLADE, AND DAMAGE ENGINE ISOLATION                                               MOUNTS. THE PILOT EXITED THE AIRCRAFT ONCE IT CAME TO REST.  THERE WERE NO INJURIES OR FIRES.

## The NTSB's investigation of this event (1)

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 SEA98LA125](https://openairdocs.org/ntsb/SEA98LA125), Jul 9, 1998: Rockwell S-2R (N4996X), Pasco, WA, substantial damage. Probable cause: Separation of the throttle linkage which resulted in the loss of power. Factors include worn throttle linkage parts and the furrows in the plowed field which was the available field for the forced…

## Other reports on N4996X (1)

Matched to the same aircraft by N-number and date.

- [Accident 20110519008409A](https://openairdocs.org/incident/20110519008409A), May 19, 2011: Rockwell International S-2R (N4996X), Kahlotus, WA, Substantial damage. Pilot attempted takeoff with strong quartering tailwind and lost control. Aircraft went partially off the right side of the runway, and then back up and all…

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. For accidents, the NTSB's own investigation is the fuller record.

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