LAX92LA312 · Piper PA-28R-201T PA-28R-201
Piper PA-28R-201T PA-28R-201 · Accident: total loss of engine power (mechanical failure) on approach
From L66 · Corona, CA to an unrecorded destination
Event
- NTSB case
- LAX92LA312
- 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
- 0
- 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
- General aviation
- 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
Piper PA-28R-201T PA-28R-201
- Aircraft type
- Piper PA-28
- 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
- N3074F
- Operator
- Derobertis, John & Patricia
- Onboard fatalities
- Unknown
- Route
- From L66 · Corona, CATo not recorded
- 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
- Part 91: General Aviation
- 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
- Approach · VFR pattern final
- 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
- Total loss of engine power (mechanical failure)
- 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
- Lubricating system, oil quickdrain/drain plug › Not safetied
- Other maintenance personnel › Maintenance, overhaul, major, poor
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
THE PILOT WAS COMPLETING A VISUAL PERSONAL FLIGHT. HE RECEIVED VECTORS TO RUNWAY 19 FINAL APPROACH COURSE AND WHEN THE AIRPLANE WAS ABOUT 2 MILES FROM THE RUNWAY THRESHOLD, THE PILOT APPLIED ADDITIONAL THROTTLE. THE ENGINE MOMENTARILY RESPONDED AND THEN CONTINUED TO MISS. THE PILOT HEARD A MUFFLED EXPLOSION AND OBSERVED A VERY SMALL PUFF OF WHITE/BLUE SMOKE EMANATING FROM THE RIGHT SIDE OF THE ENGINE COWLING. THE ENGINE QUIT WHEN THE AIRPLANE WAS ABOUT 1 1/2 MILES FROM THE THRESHOLD AT 2,500 FEET MEAN SEA LEVEL. THE AIRPLANE'S ALTITUDE WAS INSUFFICIENT TO NEGOTIATE THE AIRPORT AND THE PILOT ELECTED TO LAND IN AN OPEN VACANT LOT. THE AIRPLANE BURST INTO FLAMES AFTER IT CAME TO REST. EXAMINATION OF THE ENGINE SHOWED THAT DURING THE RECENT TOP OVERHAUL THE MECHANICS INSTALLED THE WRONG CONNECTING ROD BOLTS THAT WERE IMPROPERLY TORQUED. THE OIL DRAIN PLUG CAME LOOSE WHILE IN FLIGHT CAUSING THE ENGINE TO SUSTAIN A CATASTROPHIC FAILURE. THE MECHANICS FAILED TO SAFETY THE OIL DRAIN PLUG.
Probable cause
THE FAILURE OF THE MAINTENANCE PERSONNEL TO SAFETY THE ENGINE OIL DRAIN PLUG AND THE POOR ENGINE OVERHAUL. FACTORS RELATING TO THIS ACCIDENT ARE: OIL STARVATION; THE FAILURE OF THE CONNECTING RODS; THE INCORRECT CONNECTING ROD BOLTS; AND THE CONNECTING ROD BOLTS UNDERTORQUE.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record LAX92LA312
- Event ID
- 20001211X15205
- Case number
- LAX92LA312
- 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: investigation status. Values present in the bulk record are kept.
- The date is the local date, which is the same as the UTC date the NTSB stores.
- API snapshot SHA-256: 61ed3c9eb97f4f6b7bd3c485b443ed7be3ceef1b3288b1c7be14fa6d594f1004; retrieved 2026-09-21T23:12:18.657Z.