# STCs that may be installed: N154TL

A list on [N154TL](https://openairdocs.org/aircraft/N154TL.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 SR12332SE](https://openairdocs.org/stc/SR12332SE.md): Installation of Mechanical Specialties, LLC Human External Cargo (HEC) and non-HEC Hook System · Mechanical Specialties, LLC
- [STC SR00119DE](https://openairdocs.org/stc/SR00119DE.md): Installation of an upgraded 42 degree Tail Rotor gearbox, P/N 212-040-003, and Control Cables · Midwest Aerospace TC LLC
- [STC SR09177RC](https://openairdocs.org/stc/SR09177RC.md): Modification of the vertical fin spar · Midwest Aerospace TC LLC
- [STC SH5690NM](https://openairdocs.org/stc/SH5690NM.md): Installation of Advanced Technology Aircraft Co. engine barrier filter. · WSH, LLC
- [STC SR02596SE](https://openairdocs.org/stc/SR02596SE.md): Installation of Olympic Aero Services, Inc. Additional Telemetry Unit (ATU) · OLYMPIC AERO SERVICES INC.
- [STC SR03408CH](https://openairdocs.org/stc/SR03408CH.md): Install Airwolf Aerospace, LLC Tension-Torsion Strap Assemblies, P/N AA-204-310-101-101 or AA-204-310-101-103 · Airwolf Aerospace LLC
- [STC SR02413LA](https://openairdocs.org/stc/SR02413LA.md): Installation of an AKV, Inc Exceedence and Trend Monitoring System kit P/N ETM1000 · AKV Inc.
- [STC ST04270AT](https://openairdocs.org/stc/ST04270AT.md): Install the VTOL ASSALT V3 Windscreen Laminate Kit · VTOL LLC
- [STC SR09316RC](https://openairdocs.org/stc/SR09316RC.md): Fabrication, modification, and installation of a new vertical fin spar in accordance with Global Helicopter Technology, Inc., Drawing number VTF-030-801, Revision B, dated April 5, 2001, or later FAA approved revision. · Global Spar LLC
- [STC SR01298NY](https://openairdocs.org/stc/SR01298NY.md): Installation of replacement crosstubes P/N D212-664. · Dart Aerospace Limited
- [STC SR00563NY](https://openairdocs.org/stc/SR00563NY.md): Installation of Skidtubes and associated saddles · Dart Aerospace Limited
- [STC SR00332NY](https://openairdocs.org/stc/SR00332NY.md): Installation of Avionics Specialties power analyzer and recorder no. SL17009 and SL17061. · Aerosonic Corporation
- [STC SE00585AT](https://openairdocs.org/stc/SE00585AT.md): Installation of Aeronautical Accessories, Inc. PC Safety Valve Kit. · Bell Helicopter Textron Inc. · Lists T5313B
- [STC SE00028EN](https://openairdocs.org/stc/SE00028EN.md): Installation of Pratt & Whitney Engine Services Inc. SmartCycle Plus Engine Monitoring System, P/N EMU-K-010-1 on specified T53 engine models. · Pratt & Whitney Engine Services Inc. · Lists T5309A
- [STC SE00029EN](https://openairdocs.org/stc/SE00029EN.md): Installation of Pratt & Whitney Engine Services Inc. SmartCycle Plus Engine Monitoring System, P/N EMU-K-010-1 on specific T53 engine models. · Pratt & Whitney Engine Services Inc. · Lists T5313B
- [STC SE01440NY](https://openairdocs.org/stc/SE01440NY.md): Conversion of Honeywell engine model T5313B to Honeywell engine model T5317A utilizing Aero Design, Ltd. conversion instructions C1437.02 dtd 4/30/01. · Dart Aerospace Limited · Lists T5313B

## 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 = '118141H'
    UNION ALL SELECT stc_number, 2, 'engine', matched_model FROM 'https://openairdocs.org/data/latest/faa_engine_model_stc.parquet' WHERE engine_model_code = '41549')
  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/N154TL/stcs

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