# STCs that may be installed: N404Z

A list on [N404Z](https://openairdocs.org/aircraft/N404Z.md).

Approved for this aircraft’s airframe or engine model. The registry doesn’t record which STCs an aircraft has; its records do. In force first, then newest.

- [STC SE04651CH](https://openairdocs.org/stc/SE04651CH.md): To allow use of l00R grade aviation fuel meeting Swift Fuel, LLC specification SPEC-l00R-22 · Swift Fuels LLC
- [STC SE00825WI](https://openairdocs.org/stc/SE00825WI.md): Installation of Specialty Products Spin-on oil filter on Lycoming Engines. · B & C Specialty Products Inc.
- [STC SE2932SW](https://openairdocs.org/stc/SE2932SW.md): Install carburetor air temperature indicator. Approved for Aircooled Motors (Franklin Engine Co.) equipped with float carburetors. Model eligibility included here may not be inclusive. · Alcor LLC · Lists O-235 Series
- [STC SE208SO](https://openairdocs.org/stc/SE208SO.md): Installation of ice indicator in the carburetor. · LegacySTC.com · Lists O-235 Series
- [STC SE04349CH](https://openairdocs.org/stc/SE04349CH.md): Installation of SureFly electronic ignition · SureFly Partners Ltd.
- [STC SE02352CH](https://openairdocs.org/stc/SE02352CH.md): Installation of Challenger cleanable oil filter assembly · Challenger Aviation Products Inc.
- [STC SE00939WI](https://openairdocs.org/stc/SE00939WI.md): Installation of B&C Specialty Products Model BC 315-() Starter on Lycoming engines. · B & C Specialty Products Inc.
- [STC SE2393CE](https://openairdocs.org/stc/SE2393CE.md): Installation of B&C Speciality Products lightweight (10.2 pounds) engine starter, part number BC-315-100-1 (12 volts) or part number BC-315-100-3 (24 volts) · B & C Specialty Products Inc. · Lists O-235 Series
- [STC SE03232CH](https://openairdocs.org/stc/SE03232CH.md): Installation of Engine Preheat Kit p/n TA2925-1 for 115 volt application · Hartzell Propeller Inc.
- [STC SE04577CH](https://openairdocs.org/stc/SE04577CH.md): Install an electronic engine ignition system · Electroair Acquisition Corp
- [STC SE01966WI](https://openairdocs.org/stc/SE01966WI.md): Use of GAMI G100UL High Octane Unleaded Avgas in spark ignition piston aircraft engines · General Aviation Modifications Inc.
- [STC SE8628SW](https://openairdocs.org/stc/SE8628SW.md): Installation of oil nozzles for lubrication of cam and filters. · Cygnet Aerospace Corp
- [STC SE00218NY](https://openairdocs.org/stc/SE00218NY.md): Replacement of Lycoming starter with SKY-TEC 12 volt starter installed. · Hartzell Engine Technologies, LLC · Lists O-235 Series
- [STC SE00226NY](https://openairdocs.org/stc/SE00226NY.md): Replacement of Lycoming starter with SKY-TEC 24-volt starter Models 149-24HT and 122-24HT. Approval limited to 24-volt DC source available to the starter. · Hartzell Engine Technologies, LLC
- [STC SE00357NY](https://openairdocs.org/stc/SE00357NY.md): Replacement of Lycoming starter with SKY-TEC 24-volt starter installed. · Hartzell Engine Technologies, LLC · Lists O-235 Series
- [STC SE888GL](https://openairdocs.org/stc/SE888GL.md): Replacement of Bendix S4LN-20, -21, -1209, or -1227 model magnetos with Slick model 4250 and 4251 magnetos. · Champion Aerospace LLC
- [STC SE8707SW](https://openairdocs.org/stc/SE8707SW.md): Alteration of Lycoming O-235 engine to allow use of ethanol fuel. · Shauck Dr Maxwell E Jr
- [STC SE01930NY](https://openairdocs.org/stc/SE01930NY.md): Installation of Casper Labs 90 degree oil filter housing adapter. · Casper Labs Inc
- [STC SE01943CH](https://openairdocs.org/stc/SE01943CH.md): Add the following approved fuels: unleaded automotive gasoline 87 minimum antiknock index, per ASTM Specification D-439 or D-4814 of any volatility class, A through E, or 82UL AVGAS per ASTM D-6227. · Experimental Aircraft Association Inc.
- [STC SE1779NM](https://openairdocs.org/stc/SE1779NM.md): Installation of Precise Flight, Inc. Standby Vacuum System SVS III · Precise Flight Inc
- [STC SE5743NM](https://openairdocs.org/stc/SE5743NM.md): Intallation of adapter for externally mounted oil filter. · Aviation Development Corporation
- [STC SE09492SC](https://openairdocs.org/stc/SE09492SC.md): Installation and usage of Exxon 20W50 multigrade aircraft engine oil conforming to Exxon Oil formulation WS-3013. · Exxon Company USA · Lists O-235 Series
- [STC SE00350SE](https://openairdocs.org/stc/SE00350SE.md): Installation of sump mounted chip detector. · Aviation Development Corporation
- [STC SE8023SW](https://openairdocs.org/stc/SE8023SW.md): Installation and usage of AEROSHELL · Shell Development Co · Lists O-235 Series
- [STC SE452NE](https://openairdocs.org/stc/SE452NE.md): Installation and usage of 'Mobil AV 1' aviation oil. · Mobil Research & Development Corp · Lists O-235 Series
- [STC SE2035CE](https://openairdocs.org/stc/SE2035CE.md): Add the following approved fuel: unleaded automotive gasoline, 87 minimum antiknock index and leaded automotive gasoline, 88 minimum antiknock index (RON+MON)/2. Intermixing with aviation gasoline also approved · Petersen Aviation Inc
- [STC SE5879SW](https://openairdocs.org/stc/SE5879SW.md): Use of Phillips X/C II 20W-50 and25W-60 oil (OSS 55875) in all Avco reciprocating aircraft engines from 65 to 450 BHP. · Phillips Petroleum Co · Lists O-235 Series
- [STC SE5924SW](https://openairdocs.org/stc/SE5924SW.md): Installation of stainless steel replacement exhaust studs on AVCO engines. · Perrigo & Steele Aircraft Engr Company · Lists O-235 Series
- [STC SE1976SW](https://openairdocs.org/stc/SE1976SW.md): Manufacture of new cylinder barrels and rebarreling with original cylinder head. · Gary Aerospace Corp · Lists O-235 Series
- [STC SE5791SW](https://openairdocs.org/stc/SE5791SW.md): Installation of any or all engine components parts or modifications on Avco 0-235 series engines. · Airmotive Engineering Corp · Lists O-235 Series
- [STC SE1445SO](https://openairdocs.org/stc/SE1445SO.md): Use of Aero-blend oil additive in Teledyne (non turbocharged) aircraft engines. · ProTec · Lists O-235 Series
- [STC SE128NE](https://openairdocs.org/stc/SE128NE.md): Use of AMS/OIL 15W 50 synthetic piston aircraft oil in Avco engines. · AMS/OIL · Lists O-235 Series

## The whole list in SQL

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

```sql
SELECT m.matched_by, s.stc_number, s.description, s.holder, s.status, s.status_date, m.matched_model
FROM (
  SELECT stc_number, min(side) AS side, arg_min(matched_by, side) AS matched_by, arg_min(matched_model, side) AS matched_model
  FROM (SELECT stc_number, 1 AS side, 'airframe' AS matched_by, matched_model FROM 'https://openairdocs.org/data/latest/faa_aircraft_model_stc.parquet' WHERE aircraft_model_code = '056402A'
    UNION ALL SELECT stc_number, 2, 'engine', matched_model FROM 'https://openairdocs.org/data/latest/faa_engine_model_stc.parquet' WHERE engine_model_code = '42027')
  GROUP BY stc_number
) m JOIN 'https://openairdocs.org/data/latest/faa_stc.parquet' s USING (stc_number)
ORDER BY m.side, s.status = 'Current' DESC, s.status_date DESC, s.stc_number
```

This list as a web page: https://openairdocs.org/aircraft/N404Z/stcs

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