LAX91LA121 · North American T-28B
Worldwide Aeronautical Ind North American T-28B · Accident: total loss of engine power (mechanical failure) en route
From Davis Monthan Air Force Base (DMA) to Falcon Field (FFZ)
Event
- NTSB case
- LAX91LA121
- 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
North American T-28B
- Aircraft type
- North American T-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
- N138WW
- Operator
- Worldwide Aeronautical Ind
- Onboard fatalities
- Unknown
- Route
- From Davis Monthan Air Force Base (DMA), Tucson, AZTo Falcon Field (FFZ), Mesa, 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)
- Also codedOther events the NTSB coded in the sequence, such as a wire strike after a loss of power. Flight Findings uses them for its kinds of event. Glossary
- Stall/mush
- 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
- Engine assembly › Failure, total
- Lubricating system, oil line › Failure, total
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
THE AIRCRAFT'S ENGINE UPPER CRANKCASE OIL BREATHER LINE FAILED DURING CRUISE FLIGHT, WHICH ALLOWED THE ENGINE'S OIL TO VENT OVERBOARD. THE LACK OF OIL CAUSED THE ENGINE TO SEIZE AND A TOTAL LOSS OF ENGINE POWER RESULTED. THE PILOT SET UP A POWER-OFF APPROACH TO A ROAD, BUT ALTERED THE AIRCRAFT'S COURSE DUE TO EXCESSIVE VEHICULAR TRAFFIC ON THE ROAD. HE ATTEMPTED TO LAND THE AIRCRAFT IN AN OPEN AREA. ON SHORT FINAL, THE PILOT SAW HIGH TENSION WIRES. TO AVOID COLLIDING WITH THE WIRES, THE PILOT PULLED THE NOSE OF THE AIRCRAFT UP. THE AIRCRAFT CLEARED THE WIRES, BUT THE AIRSPEED SLOWED CAUSING THE AIRCRAFT TO STALL, RESULTING IN A HARD LANDING.
Probable cause
1) THE FAILURE OF THE AIRPLANE'S ENGINE UPPER CRANKCASE OIL BREATHER LINE; 2) TOTAL LOSS OF ENGINE POWER CAUSED BY A LACK OF LUBRICATING OIL. A FACTOR IN THIS ACCIDENT WAS THE PILOT INADVERTANTLY STALLING THE AIRCRAFT TO AVOID A COLLISION WITH A WIRE.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record LAX91LA121
- Event ID
- 20001212X16482
- Case number
- LAX91LA121
- 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: 4704d67d90afcf51bb3d4c642e7c1cadb948b60b2cb74df8aac7c336845c1557; retrieved 2026-09-21T15:31:02.916Z.