LAX86LA075 · Piper PA-34T-22OT PA-34T-22O
Piper PA-34T-22OT PA-34T-22O · Accident: total loss of engine power (mechanical failure) en route
From OBREGON,SONDRA to Nogales International Airport (OLS)
Event
- NTSB case
- LAX86LA075
- 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-34T-22OT PA-34T-22O
- Aircraft type
- Piper PA-34
- 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
- XBDRL
- Operator
- Marco Arvizi
- Onboard fatalities
- Unknown
- Route
- From OBREGON,SONDRATo Nogales International Airport (OLS), Nogales, 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
- 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
- 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
- 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
- Manufacturer › Maintenance, installation, improper
- Oil cooler control › Cracked
- Pilot in command › Aircraft handling, not maintained
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
DURING A TRANS BORDER VFR X-COUNTRY FLT, THE PLT NOTICED 'OIL SPIRTING FROM THE LEFT ENGINE' WITH SMOKE, & HE SHUT IT DOWN. AN EMERGENCY WAS DECLARED BY THE TUCSON ATCT, WHO CLEARED THE ACFT TO LAND STRAIGHT IN ON RWY 29L. TOWER PERSONNEL OBSERVED THE ACFT PORPOISE ABOUT 7,000 FT DOWN THE RWY BEFORE GROUND LOOPING AND SLIDING OFF THE LEFT SIDE. THE ACFT & ENGINES HAD ABOUT 249 HOURS TOTAL TIME. EXAMINATION OF THE LEFT ENGINE REVEALED A 3/4 INCH CRACK IN THE LOWER FRONT WELD SEAM OF THE OIL COOLER. THE CRACK WAS ONLY VISABLE UNDER PRESSURE TESTING.
Verbatim NTSB analysis from the NTSB dataset
Sources
NTSB record LAX86LA075
- Event ID
- 20001214X38451
- Case number
- LAX86LA075
- 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: 62f09755c6b73d610fb931412232b3d93c9cc74584c19a4eca002eabefc58b54; retrieved 2026-09-23T15:10:20.446Z.