# STCs that may be installed: N58AH

A list on [N58AH](https://openairdocs.org/aircraft/N58AH.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 SR04549AT](https://openairdocs.org/stc/SR04549AT.md): Conversion of the Pratt & Whitney PT6T-3 to the PT6T-3B configuration · Centerpointe Aerospace
- [STC SA5783NM](https://openairdocs.org/stc/SA5783NM.md): Fabrication of Onboard Systems Model 7 CROPHAWK spray flow measuring system. · Onboard Systems International
- [STC SH5780NM](https://openairdocs.org/stc/SH5780NM.md): Fabrication of Onboard Systems model E-46 cargo hook load weigh system. · Onboard Systems International
- [STC SR02704SE](https://openairdocs.org/stc/SR02704SE.md): Installation and maintenance of the Sunspot 36 and 46 series lights · AeroLED's Holdings LLC
- [STC SR04483CH](https://openairdocs.org/stc/SR04483CH.md): Installation of NASI NREM18M Air Conditioning Module · National Aircraft Service Inc. (NASI)
- [STC SR00359BO](https://openairdocs.org/stc/SR00359BO.md): Installation of Parmetheus Plus LED PAR36 and PAR46 taxi and landing lights. · Whelen Aerospace Technologies
- [STC SH464NE](https://openairdocs.org/stc/SH464NE.md): Installation of an Alternate Float Bottle System. · California Helicopter Parts Inc
- [STC SH513NE](https://openairdocs.org/stc/SH513NE.md): Replacement of auxiliary fuel boost pumps with Parker Hannifin-Airborne inline auxiliary fuel booster pump · California Helicopter Parts Inc
- [STC SR02394AK](https://openairdocs.org/stc/SR02394AK.md): Replacement of existing landing and/or hover light bulbs with Light Emitting Diode (LED) lighting system · Seaplanes North LLC
- [STC SR03310CH](https://openairdocs.org/stc/SR03310CH.md): Installation of NASI Air Conditioning Module · National Aircraft Service Inc
- [STC SA2693NM](https://openairdocs.org/stc/SA2693NM.md): Installation of Electronics International digital volt/amp gauges and accessories. · Electronics International Inc.
- [STC SR00968CH](https://openairdocs.org/stc/SR00968CH.md): Reduce take-off gross weight from 13,000 to 12,500 lbs. During passenger and internal cargo carrying operations. (S-58ET s/n 58-855) · Midwest Truxton International, Inc.
- [STC SR00042SE](https://openairdocs.org/stc/SR00042SE.md): Modification to allow the use of Configuration II aircraft performance limits. · Glacier Helicopter Inc
- [STC SA1626NM PAGE 2](https://openairdocs.org/stc/SA1626NM%20PAGE%202.md): Installation of Electronics Int'l Digital EGT/CHT Instruments and accessories. (201 Series) · Electronics International
- [STC SH2212NM](https://openairdocs.org/stc/SH2212NM.md): Installation of Silver Instruments Fueltron IIIPT-IGS, IIIPT-IPS, IIIPT-ILS, IIIPT-IKS digital fuel flow indicating system. · Arnav Systems Inc
- [STC SH770NW](https://openairdocs.org/stc/SH770NW.md): Installation of a weighing system. · Onboard Systems
- [STC SH4570NM](https://openairdocs.org/stc/SH4570NM.md): Approval for takeoffs and landings up to and including 12,000 feet density altitude is authorized. · Air One Helicopters, Inc
- [STC SA4302NM](https://openairdocs.org/stc/SA4302NM.md): Installation of Electronics Int'l digital automatic engine analyzer. · Electronics International
- [STC SH4539NM](https://openairdocs.org/stc/SH4539NM.md): Establish a nine passenger seat configuration. · Air One Helicopters, Inc
- [STC SH1010GL](https://openairdocs.org/stc/SH1010GL.md): Reduction of standard passenger seating from sixteen to nine seats or less. · Brainerd Helicopters, Inc
- [STC SH4507NM](https://openairdocs.org/stc/SH4507NM.md): Approval for takeoffs and landings up to and including 12,000 feet densiy altitude is authorized. · Los Angeles County Sheriff's Department Aero Bureau
- [STC SA513NE](https://openairdocs.org/stc/SA513NE.md): Replacement of auxiliary fuel boost pumps with Parker-Hannifin-Airborne in-line auxiliary fuel booster pumps. · California Helicopter International
- [STC SH4477NM](https://openairdocs.org/stc/SH4477NM.md): Installation of FC/FT-10 digital fuel flow indicating system. · Arnav Systems, Inc
- [STC SH1215GL](https://openairdocs.org/stc/SH1215GL.md): Reduction of standard passenger seating from sixteen to nine seats or less. · Midwest Truxton International, Inc.
- [STC SH142WE](https://openairdocs.org/stc/SH142WE.md): Installation of electronic weighing system c-40. · Onboard Systems
- [STC SH2572NM](https://openairdocs.org/stc/SH2572NM.md): Increased takeoff and landing density altitude limit. · North American Heli Svc Inc
- [STC SH453NW](https://openairdocs.org/stc/SH453NW.md): Installation of an electronic weighing system (for monitoring cargo weight) · Measurement Systems Intl
- [STC SH1194EA](https://openairdocs.org/stc/SH1194EA.md): Conversion from original 12 passenger configuration to a 9 passenger configuration. · Carson Helicopters Inc
- [STC SH268WE](https://openairdocs.org/stc/SH268WE.md): Installation of stainless steel fire shields around aluminum engine mount fittings (P/N S1620-61435) of HSS, HUS, H-34 military series helicopters. (S-58 SERIES Military versions HSS, HUS, H-34) · TBM, Inc · Lists S-58 Series
- [STC SA77GL](https://openairdocs.org/stc/SA77GL.md): Installation of Bendix weather radar RDR-1200. · Chicago Heli Airways Inc
- [STC SH3NE](https://openairdocs.org/stc/SH3NE.md): Norton AC3093K radome installation and Bendix RDR 110 radar system installation. · Oxford Avionics, Inc
- [STC SE00022EN](https://openairdocs.org/stc/SE00022EN.md): Installation of Oil Tank Filler Neck Check Valve. · Helicopter Support Inc Services Div
- [STC SE659NE](https://openairdocs.org/stc/SE659NE.md): Installation of oil tank filler neck check valve, P/N TSA-76A. · Aviation Components Support

## 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 = '8141803'
    UNION ALL SELECT stc_number, 2, 'engine', matched_model FROM 'https://openairdocs.org/data/latest/faa_engine_model_stc.parquet' WHERE engine_model_code = '52106')
  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/N58AH/stcs

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