# STCs that may be installed: N25LB

A list on [N25LB](https://openairdocs.org/aircraft/N25LB.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.

Page 1 of 3 · 135 STCs

- [STC SA800EA](https://openairdocs.org/stc/SA800EA.md): Installation of Whelen Anti-Collision, Position, or Anti-Collision/Position Light System, and applicable associated power supplies · Whelen Aerospace Technologies
- [STC SH153WE](https://openairdocs.org/stc/SH153WE.md): Installation of Transland Model54170 agricultural spray system · Texas Transland LLC
- [STC SH3319NM](https://openairdocs.org/stc/SH3319NM.md): Installation of Precise Flight Pulselite Control Unit in the Landing /Taxi Recognition Visual Control Light system, · Precise Flight Inc
- [STC SR09066RC](https://openairdocs.org/stc/SR09066RC.md): Fabricate the HAC-47-3 Tail Rotor Blade. · Scott's-Bell 47 Inc
- [STC SR02704SE](https://openairdocs.org/stc/SR02704SE.md): Installation and maintenance of the Sunspot 36 and 46 series lights · AeroLED's Holdings LLC
- [STC SA02268CH](https://openairdocs.org/stc/SA02268CH.md): Installation of Airwolf Filter Corp. Air Oil Separator · Airwolf Filter Corporation
- [STC SH2772SW](https://openairdocs.org/stc/SH2772SW.md): Revise mast controls and remove stabilizer bar and install control system. · Scott's-Bell 47 Inc
- [STC SA615EA](https://openairdocs.org/stc/SA615EA.md): Installation of a Whelen Anti-Collision Strobe Light System as replacement for originally installed anti-collision lights. · Whelen Aerospace Technologies
- [STC SR00359BO](https://openairdocs.org/stc/SR00359BO.md): Installation of Parmetheus Plus LED PAR36 and PAR46 taxi and landing lights. · Whelen Aerospace Technologies
- [STC SR01845SE](https://openairdocs.org/stc/SR01845SE.md): Installation of a barrier air filtration system · Cascade Flying Service LLC
- [STC SR00408NY](https://openairdocs.org/stc/SR00408NY.md): Installation of Airwolf remote mounted engine oil filter model AFC-600. · Airwolf Filter Corporation
- [STC SR02487AK](https://openairdocs.org/stc/SR02487AK.md): Installation of L-3 Communications Avionics Systems ESI-500 Standby Instrument System · ADS-B Technologies, LLC
- [STC SR02470AK](https://openairdocs.org/stc/SR02470AK.md): Installation of the L-3 Communications NGT -1000/2000/2500 ADS-B System · ADS-B Technologies, LLC
- [STC SR02471AK](https://openairdocs.org/stc/SR02471AK.md): Installation of the L-3 Communications NGT -9000/9000R ADS-B System · ADS-B Technologies, LLC
- [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 SH1459SW](https://openairdocs.org/stc/SH1459SW.md): Long nose single place cabin, without doors, included in a modified center frame, modified controls to accommodate new cabin/center frame, modified hydraulic system, oil system, and instrument panel, modified tail boom and delete synchronized elevator to add a modified fuel system · Scott's Bell 47 Inc
- [STC SH161WE](https://openairdocs.org/stc/SH161WE.md): Installation of exhaust muffler assembly. · Scott's Bell 47 Inc
- [STC SH166GL](https://openairdocs.org/stc/SH166GL.md): Installation of Low Fuel Warning System · Scott's Bell 47 Inc
- [STC SH1710GL](https://openairdocs.org/stc/SH1710GL.md): Install fixed elevator in lieu of synchronized elevator. · Scott's Bell 47 Inc
- [STC SH382SW](https://openairdocs.org/stc/SH382SW.md): Eligible only on Bell 47 series with open tail booms. Installation of sign per Kitz Kopter's Drawing KK-101 dated 10/14/64. · Scott's Bell 47 Inc
- [STC SR09321RC](https://openairdocs.org/stc/SR09321RC.md): Installation of Improved Main Rotor Grips and Matching Adapter Nut · Scott's Bell 47 Inc
- [STC SR09346RC](https://openairdocs.org/stc/SR09346RC.md): Installation of main rotor blade grip with modified root radius and matching adapter in accordance with Helicopter Tech, Inc., Drawing List R47-120-252-1000, Revision IR, dated May 15, 2002, or later Federal Aviation Administration (FAA) approved revision. · Helicopter Tech Inc.
- [STC SA00068SE](https://openairdocs.org/stc/SA00068SE.md): Installation of fuel flow/pressure instruments. (W/TSIO-360-MB1) · Electronics International Inc.
- [STC SA2693NM](https://openairdocs.org/stc/SA2693NM.md): Installation of Electronics International digital volt/amp gauges and accessories. · Electronics International Inc.
- [STC SA4172NM](https://openairdocs.org/stc/SA4172NM.md): Installation of Aviation Development oil filter. · Aviation Development Corporation
- [STC SH657NW](https://openairdocs.org/stc/SH657NW.md): Installation of Allison 250-C18A, -C18C, -C20, -C20B engine and related changes. · Siam Hiller Holdings Inc
- [STC SA00680SE](https://openairdocs.org/stc/SA00680SE.md): Installation of Electronics International model UBG-16 or UBG-16T bar graph engine analyzer. · Electronics International
- [STC SR01430LA](https://openairdocs.org/stc/SR01430LA.md): Installation of Stainless Steel Skid shoes. · Papas Gary Los Angeles Laboratories Inc.
- [STC SA489EA](https://openairdocs.org/stc/SA489EA.md): Installation of ARP Inc. carburetor ice detection system · Aircraft & Rotorcraft Products (ARP) Inc
- [STC SH1343SO](https://openairdocs.org/stc/SH1343SO.md): Installation of Utah Research& Development's Model 124BC101 airborne battery charger. · Aviall Services, Inc. · Lists 47 Series
- [STC SA2687NM](https://openairdocs.org/stc/SA2687NM.md): Installation of Truboplus/ Electronics Int'l gauges and switches. · Aero Manufacturing Inc.
- [STC SA00238SE](https://openairdocs.org/stc/SA00238SE.md): Installation of Aviation Development Corporation's sump mounted chip detector · Aviation Development Corporation
- [STC SA1626NM PAGE 1](https://openairdocs.org/stc/SA1626NM%20PAGE%201.md): Installation of Electronics Int'l Digital EGT/CHT Instruments and accessories. (201 Series) · Electronics International
- [STC SH8441SW](https://openairdocs.org/stc/SH8441SW.md): Installation of a float assembly. · Aero Products, Inc
- [STC SA2844CE](https://openairdocs.org/stc/SA2844CE.md): Installation of a plastic cap enclosure over the anti-collision strobe light system. · Air Transport Inc
- [STC SH5142NM](https://openairdocs.org/stc/SH5142NM.md): Install rotary atomizers, Simplex model 10060, on Simplex spray booms approved under on the the STC's SH787NW, SH856NW, SH889NW, or SH891NW. · Simplex Manufacturing Company
- [STC SA2350NM PAGE 1](https://openairdocs.org/stc/SA2350NM%20PAGE%201.md): Installation of Electronics International Inc digital carburetor/outside air temperature gauges · Electronics International
- [STC SH370GL](https://openairdocs.org/stc/SH370GL.md): Installation of Facet Enterprises, Inc. engine lubrication system scavenge filter. · Facet Filter Products
- [STC SA4302NM](https://openairdocs.org/stc/SA4302NM.md): Installation of Electronics Int'l digital automatic engine analyzer. · Electronics International
- [STC SA3862NM PAGE 1](https://openairdocs.org/stc/SA3862NM%20PAGE%201.md): Installation of Electronics International Primary TIT/EGT/CHT instruments, remote switches and associated accessories. · Electronics International
- [STC SA4173NM](https://openairdocs.org/stc/SA4173NM.md): Installation of Simplex Model 7600 modular electrical system. (47G-5 WITH 12 VOLT SYSTEM) · Simplex Manufacturing Company · Lists 47 Series
- [STC SH4173NM](https://openairdocs.org/stc/SH4173NM.md): Installation of Simplex Model 7600 modular electrical system. (US ARMY OH-13E M74A) · Simplex Manufacturing Company
- [STC SH2945NM](https://openairdocs.org/stc/SH2945NM.md): Addition of a twist grip on the cyclic pitch stick to provide hand operated yaw control · Narad James L
- [STC SH3351NM](https://openairdocs.org/stc/SH3351NM.md): Addition of a twist grip on the cyclic pitch stick to provide a hand operated yaw control. · Narad James L · Lists 47 Series
- [STC SH2277NM](https://openairdocs.org/stc/SH2277NM.md): Installation of AC-OF-105A oil filter. · Rio Verde Heli Inc
- [STC SA2190NM PAGE 1](https://openairdocs.org/stc/SA2190NM%20PAGE%201.md): Installation of electronics International Digital Volt/Amp Gauges and Accessories. · Electronics International
- [STC SH2247NM](https://openairdocs.org/stc/SH2247NM.md): Installation of Jasco Model 7145T alternator. · Wardle J F
- [STC SH507GL](https://openairdocs.org/stc/SH507GL.md): Installation of modified tail rotor gearbox using original installation hardware and components. · Helicopters, Inc
- [STC SH856NW](https://openairdocs.org/stc/SH856NW.md): Installation of Simplex Model 4800 spray system. · Simplex Manufacturing Co
- [STC SH888NW](https://openairdocs.org/stc/SH888NW.md): Installation of a Simplex Model 5750 spray system. · Simplex Manufacturing Co

Next page: https://openairdocs.org/aircraft/N25LB/stcs.md?page=2

## 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 = '1181034'
    UNION ALL SELECT stc_number, 2, 'engine', matched_model FROM 'https://openairdocs.org/data/latest/faa_engine_model_stc.parquet' WHERE engine_model_code = '03014')
  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/N25LB/stcs

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