# Registered aircraft: Hirth HM-504

A list on [Hirth HM-504](https://openairdocs.org/engine/hirth-hm-504.md).

Aircraft with this engine in the FAA registry, by N-number.

- [N181BU](https://openairdocs.org/aircraft/N181BU.md): Weeks Kermit A · Polk City, FL · S/N 461
- [N41455](https://openairdocs.org/aircraft/N41455.md): Weeks Kermit · Polk City, FL · S/N 78
- [N52DJ](https://openairdocs.org/aircraft/N52DJ.md): Persons David A · Silver Lake, KS · S/N CH21191CW0761

## The whole list in SQL

Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS:

```sql
SELECT n_number, serial_number, year_manufactured, status, registrant_name, registrant_city, registrant_state
FROM 'https://openairdocs.org/data/latest/faa_aircraft_registration.parquet'
WHERE engine_model_code IN ('33701')
ORDER BY n_number
```

This list as a web page: https://openairdocs.org/engine/hirth-hm-504/aircraft

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