LAX05TA226 · Ayres Corporation S2R-G10
State of Arizona, Forestry Division Ayres Corporation S2R-G10 · Accident: partial loss of engine power (non-mechanical) en route
From Marana Regional Airport (AVQ) to Wickenburg Municipal Airport (E25)
Event
- NTSB case
- LAX05TA226
- Event typeAccident: someone killed or seriously injured, or the aircraft substantially damaged (NTSB definition). Incident: an occurrence that affected or could have affected safety, short of that. Glossary
- Accident
- InvestigationHow far the investigation had got when the record was published: preliminary, ongoing, final or completed. Unknown where the source does not say. Glossary
- Completed
- API-reported fatalities
- 0 · all aircraft and ground
- Ground fatalities
- Unknown
- OperationWhat kind of flying it was, grouped by the rules it flew under: airline (US Part 121), air taxi and commuter (Part 135), general aviation (Part 91 and similar), military or government. Glossary
- Government
- WeatherVisual meteorological conditions (VMC): good enough to fly by looking outside. Instrument conditions (IMC): cloud or low visibility, flying by instruments. Glossary
- Visual Meteorological Cond
Ayres Corporation S2R-G10
- Aircraft type
- Ayres S2
- Category
- Airplane
- RegistrationThe aircraft's tail number, such as N12345 or G-ABCD. Registrations are reissued, so the same one years apart can be a different aircraft. Glossary
- N440AT
- Onboard fatalities
- Unknown
- Route
- From Marana Regional Airport (AVQ), Marana, AZTo Wickenburg Municipal Airport (E25), Wickenburg, AZ
- Aircraft age
- Not recorded
- Flight rulesThe regulations the flight operated under: in the US, Part 91 (general aviation), Part 121 (airlines), Part 135 (air taxi and commuter) and others; for flights abroad, the NTSB's coarser commercial or non-commercial code. Glossary
- Public Aircraft
- Phase of flightThe stage of the flight when things started to go wrong: standing, taxi, takeoff, initial climb, en route, maneuvering, approach or landing. Glossary
- En route · cruise
- First occurrenceThe single coded event the NTSB judges best describes what happened (records from 2008 on). Older records name the first occurrence in the sequence instead. Glossary
- Partial loss of engine power (non-mechanical)
- DamageDestroyed: beyond practical repair. Substantial: damage that affects the structure, performance or handling and normally needs major repair. Minor: less than that. Glossary
- Substantial
Cause areas
- Reason for occurrence undetermined
Approximate · Coordinates from the NTSB case API, which marks them as estimated or does not say; no uncertainty radius is established.
NTSB narrative
The airplane impacted uneven terrain, scrub brush, and cactus during a forced landing following a reported loss of engine power during cruise flight. The pilot reported that he was in cruise flight about 1,000 feet above the ground when the engine lost torque and the propeller began to auto-feather. The pilot made a mayday call and looked for a suitable place to land, but was unable to find anything. The airplane touched down in rough, uneven terrain. The airplane was loaded with 4 hours of fuel prior to the accident flight, which was about 1 hour 15 minutes in duration. The engine, engine accessories, and propeller were examined following the accident. No anomalies were noted with any of the components that would have resulted in the reported loss of engine power. There were many indications of power being developed at the time of impact, such as the separation of the propeller from the flange, the damage to the propeller blades, and the sheared torsion shaft; however, the amount of power being developed could not be quantified.
Probable cause
the partial loss of engine power for undetermined reasons.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record LAX05TA226
- Event ID
- 20050712X00992
- Case number
- LAX05TA226
- Dataset
- historical-pre2008
- Source SHA-256
- 89e2df6d848e7ab3b42e7d7c7a03ff403303057a26ca04c95b3ea67201c3ce74
Source notes (4)
- Unreviewed is an editorial label, not an investigation status. API-sourced is not report-checked or human-reviewed. Explicit event totals are used without summing aircraft injury tables; onboard allocation is withheld. Unknown values remain unknown. The operation category is mapped from the NTSB-reported FAR part and has not been reviewed.
- Filled from the NTSB case API where the bulk record had no value: local date, investigation status, coordinates. Values present in the bulk record are kept.
- The date is the local date; the NTSB stores the UTC date 2005-07-07.
- API snapshot SHA-256: 18e9e629c17729e537c2bf8c7e262a68e5f6c4d2e47444eefbcdc43b3c5c2c3d; retrieved 2026-09-18T21:15:52.474Z.