# Jacobs L-4MB

- Type: Engine model (FAA registry)
- Registry code: 35030
- Manufacturer (registry): JACOBS
- Model: L-4MB
- Engine type: Reciprocating
- Power: 245 hp
- Installed in: 1 registered aircraft
- Page: https://openairdocs.org/engine/jacobs-l-4mb

Model codes come from the FAA registry's reference file.

## ADs that may apply (OpenAirDocs)

Matched to this engine model by model name and maker. Each AD's applicability may narrow it by serial number, part number or equipment.

None matched.

## Registered aircraft (1)

- [N119Y](https://openairdocs.org/aircraft/N119Y): [Labarre John D](https://openairdocs.org/faa-owner/LABARRE%20JOHN%20D), [Cincinnati, OH](https://openairdocs.org/faa-place/OH/Cincinnati), built 1930, S/N 3220

## NTSB investigations (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 ERA26LA280](https://openairdocs.org/ntsb/ERA26LA280), Jul 24, 2026: Waco ASO (N119Y), Hamilton, OH, substantial damage. Probable cause: The separation of the right main landing gear axle, which resulted in a loss of control during the landing roll.

## FAA accident and incident reports (1)

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.

- [Accident 20260724010089A](https://openairdocs.org/incident/20260724010089A), Jul 24, 2026: Waco ASO (N119Y), Hamilton, OH, Substantial damage. On July 24, 2026, a Waco Aso, registration [privacy data omitted], departed khao (Butler county regional airport) for a local flight with one pilot and three…

## Service difficulty reports (1)

As reported by operators and repair stations, by the model named in the report.

- [SDR 95ZZZX4553](https://openairdocs.org/sdr/95ZZZX4553), Aug 29, 1995: STUD. FAILED. FOLLOWING OVERHAUL, ENGINE WAS PUT IN SERVICE. AT 593 HOURS, CHANGED OUT THE NR 5 CYLINDER AND FOUND NOTHING THAT WOULD HAVE BEEN ALARMING OR INDICATIVE OF WHAT

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.