# Accident 19990728010079A: Ayres S2R, Isola, MS, July 28, 1999

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: July 28, 1999, 06:50 local time
- Place: Isola, MS
- Damage: Destroyed
- Phase of flight: Fcd/Prec Ldg From Cruise
- Operating rules: Agricultural (Part 137)
- Operator: KZWG
- Location: 33.2593° N, 90.5903° W: From the FAA, an estimate near the named town, within about 3 miles
- Nearby events: https://openairdocs.org/map.md?lat=33.2593&lon=-90.5903&mi=10
- Aircraft: N8482V, a cancelled registration (https://openairdocs.org/deregistered/N8482V-2012-08-02) (OpenAirDocs)
- Registry model: Rockwell International S-2R (registry code 7630202, https://openairdocs.org/model/rockwell-international-s-2r) (OpenAirDocs)
- Reported make and model: AYRES S2R
- Reported engine: PWA R1340AN1
- Fatal injuries: 0
- Pilot flight hours: 12,888 total, 11,476 in this make and model, 148 in the last 90 days
- NTSB investigation: [NTSB MIA99LA204](https://openairdocs.org/ntsb/MIA99LA204) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19990728010079A

## Narrative

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

ACFT WAS INVOLVED IN AERIAL APPLICATION WHEN IT LOST ENGINE OIL PRESSURE, THE ENGINE FAILED, AND THE ACFT STRUCK TREES WHILE ATTEMPTING TO LAND, OTHER CIRCUMSTANCES ARE UNKNOWN. (-23) PILOT STATED HE HEARD THREE LOUD BANGS AND WHAT APPEARED TO BE BLACK SMOKE FROM EXHAUST STACK. ENGINE POWER WAS LOST AFTER THE THIRD BANG AND EMERGENCY LANDING WAS INITIATED IN A ROUGH OVERGROWN FIELD.  LANDING GEAR COLLAPSED AND AIRCRAFT WAS CONSUMED BY FIRE. (.4) WHILE PERFORMING AERIAL APPLICATION THE PILOT STATED THE ENGINE BACKFIRED TWICE, LOST OIL PRESSURE, BACKFIRED AGAIN, AND THEN SHUTDOWN. WHILE MAKING A FORCED LANDING THE AIRCRAFT COLLIDED WITH A DITCH AND A POST CRASH FIRED ERUPTED, WHICH DESTROYED THE AIRCRAFT. POSTCRASH EXAMINATION OF THE ENGINE UNDER FAA SUPERVISION SHOWED THE NO. 4 CYLINDER HAD COMPRESSION OF 35 OVER 80 PSI., AND WAS LEAKING THROUGH THE INTAKE VALVE. ALSO, 7 OF 18 VALVES WERE NOT ADJUSTED WITHIN MANUFACTURER'S LIMITS AND ALL SPARK PLUG GAPS WERE ADJUSTED ABOVE MANUFACTURER'S LIMITS.

## 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 MIA99LA204](https://openairdocs.org/ntsb/MIA99LA204), Jul 28, 1999: Rockwell S-2R (N8482V), Isola, MS, destroyed. Probable cause: Failure of the No. 4 cylinder due to a leaking intake valve resulting in loss of engine power and collision with a ditch while making a forced landing on unsuitable terrain. Contributing to the…

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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