# STCs that may be installed: Howard 500

A list on [Howard 500](https://openairdocs.org/model/howard-500.md).

In force first, then newest. The registry doesn’t record which STCs an aircraft has.

- [STC SA02511SE](https://openairdocs.org/stc/SA02511SE.md): Installation of replacement fuel quantity indicator sending unit(s) · CiES Inc.
- [STC SA451CE](https://openairdocs.org/stc/SA451CE.md): Install Hoskins Twilighter MK III Supplementary lighting system with Model E, F or P wing tip and Model C tail lights. · BF Goodrich Aerospace
- [STC SA98CE](https://openairdocs.org/stc/SA98CE.md): Installation of Hoskins Supplemental Model A, B, E high intensity wing tip lights, Model C tail light, with or without Model 2 high intensity fuselage light. · BF Goodrich Aerospace
- [STC SA1969SW](https://openairdocs.org/stc/SA1969SW.md): Installation of tail wheel tire 6.00 X 6, 8 PR, Type III and wheel. · Sierra Industries, Inc
- [STC SA546SW](https://openairdocs.org/stc/SA546SW.md): Installation of double action main landing gear doors. · Sierra Industries, Inc
- [STC SA686SW](https://openairdocs.org/stc/SA686SW.md): Installation of Pratt & Whitney R2800-CB16 engine power ratings with 100/130 grade fuel and cabin compressor automatic disconnect. · Sierra Industries, Inc
- [STC SA738SW](https://openairdocs.org/stc/SA738SW.md): Installation of elevator torque tube flange. · Sierra Industries, Inc
- [STC SA743SW](https://openairdocs.org/stc/SA743SW.md): Clamp, flap actuating cylinder H500 P/N 5-104268-1. · Sierra Industries, Inc
- [STC SA760SW](https://openairdocs.org/stc/SA760SW.md): Installation of flap actuating cylinder attach bracket. · Sierra Industries, Inc
- [STC SA723SW](https://openairdocs.org/stc/SA723SW.md): F1002 windshield temperature control system. · Flores M R
- [STC SA451SW](https://openairdocs.org/stc/SA451SW.md): Installation of exhaust system · Howard Research & Development Co.

## The whole list in SQL

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

```sql
SELECT s.stc_number, s.description, s.holder, s.status, s.status_date, m.matched_model
FROM (
  SELECT stc_number, min(matched_model) AS matched_model
  FROM 'https://openairdocs.org/data/latest/faa_aircraft_model_stc.parquet'
  WHERE aircraft_model_code IN ('05620L5')
  GROUP BY stc_number
) m JOIN 'https://openairdocs.org/data/latest/faa_stc.parquet' s USING (stc_number)
ORDER BY s.status = 'Current' DESC, s.status_date DESC, s.stc_number
```

This list as a web page: https://openairdocs.org/model/howard-500/stcs

---
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.