# STCs that may be installed: N154AC A list on [N154AC](https://openairdocs.org/aircraft/N154AC.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 SR02807SE](https://openairdocs.org/stc/SR02807SE.md): Installation of a Fly Away Tool box · Helicopter Transport Services LLC - [STC SR11923SE](https://openairdocs.org/stc/SR11923SE.md): Installation of Helicopter Transport Services, LLC Shock Absorber HTS-2000 · Helicopter Transport Services LLC - [STC SR11810SE](https://openairdocs.org/stc/SR11810SE.md): Installation of Helicopter Transport Services, LLC External Load Indicating System · Helicopter Transport Services LLC - [STC SR04343CH](https://openairdocs.org/stc/SR04343CH.md): Installation of Heli-Preheat Kit, p/n TA3193-1 for 115 volt application in accordance with Heli-Preheat Kit drawing TA3193-1 Revision D, dated December 11, 2023 or later FAA approved revisions and Preheat Kit Installation Instruction TNH3193 Revision B, dated July 6, 2018 or later FAA approved revisions · HARTZELL PROPELLER LLC - [STC SR02777SE](https://openairdocs.org/stc/SR02777SE.md): Installation of a Load Beam · Helicopter Transport Services 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 SR02754SE](https://openairdocs.org/stc/SR02754SE.md): Installation of External Cargo Container · Helicopter Transport Services, LLC - [STC SR02717SE](https://openairdocs.org/stc/SR02717SE.md): Installation of Helicopter Transport Services Remote Fuel Sump System · Helicopter Transport Services LLC - [STC SR02684SE](https://openairdocs.org/stc/SR02684SE.md): Installation of Helicopter Transport Services, LLC (HTS) lightweight firefighting refill pump · Helicopter Transport Services LLC - [STC SR00925DE](https://openairdocs.org/stc/SR00925DE.md): Installation of Garmin GTX 335/335R and GTX345/345R transponders to provide ADS-B Out and In functionality · Peregrine - [STC SR00004SE](https://openairdocs.org/stc/SR00004SE.md): Fabrication and installation of Erickson fire fighting system · Erickson Air Crane Inc. dba Erickson Air-Crane - [STC SR00815SE](https://openairdocs.org/stc/SR00815SE.md): Fabrication and installation of Erickson Model Sea Snorkel system · Erickson Air Crane Inc. dba Erickson Air-Crane - [STC SR09574RC](https://openairdocs.org/stc/SR09574RC.md): Installation of Night Vision Goggle Compatible Lighting System · Aero Dynamix Inc. - [STC SR02503SE](https://openairdocs.org/stc/SR02503SE.md): Installation of Additional Telemetry Unit (ATU) · Helicopter Transport Services LLC - [STC SR01192LA](https://openairdocs.org/stc/SR01192LA.md): Installation of a 2,000 gallon RADS11-200 Helitank Fire Retardant System. · United Aeronautical Corporation - [STC SR02055SE](https://openairdocs.org/stc/SR02055SE.md): Replacement tail rotor blades, Part Numbers 65161-00001-041MII and/or 65161-00001-043MII · Helicopter Transport Services LLC - [STC SH5653NM](https://openairdocs.org/stc/SH5653NM.md): Re-mounting of the turbine engines and reinforcement of the associated fuselage support structure with Erickson detuned engine mounting system (DEMS). · Erickson Incorporaated/dba Erickson Air-Crane - [STC SH5764NM](https://openairdocs.org/stc/SH5764NM.md): Increase in maximum ground idle speed. · Erickson Air Crane Inc. dba Erickson Air-Crane - [STC SR00026SE](https://openairdocs.org/stc/SR00026SE.md): Fabrication and Installation of Erickson external load dynamic shock absorber system. · Erickson Air Crane Inc. dba Erickson Air-Crane - [STC SR01955NY-D](https://openairdocs.org/stc/SR01955NY-D.md): Installation of a Keystone Helicopter Anit-Rotational Restraint System. · Erickson Air Crane Inc. dba Erickson Air-Crane - [STC SR01611NY-D](https://openairdocs.org/stc/SR01611NY-D.md): Installation of a Keystone Helicopter cargo pod. · Erickson Air Crane Inc. dba Erickson Air-Crane - [STC SR01612NY-D](https://openairdocs.org/stc/SR01612NY-D.md): Installation of a Keystone Helicopter Cargo Pod. · Erickson Air Crane Inc. dba Erickson Air-Crane - [STC SR00913SE](https://openairdocs.org/stc/SR00913SE.md): Installation of bubble window in pilot and co-pilot doors in accordance with Section D of Erickson Air-Crane (EAC) Report No. 1310, dated May 7, 2001, or later FAA approved revision; and removal of the tail pylon fairing and main landing gear fairings in accordance with EAC Maintenance Instructions No. RS-052 and RS-053, respectively, each dated May 10, 2001, or later FAA approved revision. Approved for serial number 64018 ONLY. · Erickson Air Crane Inc. dba Erickson Air-Crane - [STC SH1618NM](https://openairdocs.org/stc/SH1618NM.md): Installation of externally mounted ferry tanks. · Erickson Air Crane Inc. dba Erickson Air-Crane - [STC SH2907NM](https://openairdocs.org/stc/SH2907NM.md): Replacement of the existing combustion type cockpit heater with an engine bleed air type heater system on Erickson Model S-64E rotorcraft · Erickson Air Crane Inc. dba Erickson Air-Crane - [STC SH2908NM](https://openairdocs.org/stc/SH2908NM.md): Modification of the external loads lifting pendant and system · Erickson Air Crane Inc. dba Erickson Air-Crane - [STC SH2910NM](https://openairdocs.org/stc/SH2910NM.md): Installation of Erickson EAC-4675 tail pipe extension · Erickson Air Crane Inc. dba Erickson Air-Crane - [STC SH3853NM](https://openairdocs.org/stc/SH3853NM.md): Modification of the Rotorcraft flight Manual · Erickson Air Crane Inc. dba Erickson Air-Crane - [STC SH4746NM](https://openairdocs.org/stc/SH4746NM.md): Use of Mobil Oil Corp. 'Mobilgrease 28' synthetic grease to lubricate the main rotor head, swash plate and various associated linkages. · Erickson Air Crane Inc. dba Erickson Air-Crane - [STC SH5166NM](https://openairdocs.org/stc/SH5166NM.md): Re-mounting of the turbine engines and reinforcement of the associated fuselage support structure with Erickson detuned engine mouting system (DEMS). · Erickson Air Crane Inc. dba Erickson Air-Crane - [STC SH5724NM](https://openairdocs.org/stc/SH5724NM.md): Use of Mobil Oil Corporation Mobilith SHC220 synthetic grease to lubricate selected components in place of the previously approved grease. · Erickson Air Crane Inc. dba Erickson Air-Crane - [STC SH5776NM](https://openairdocs.org/stc/SH5776NM.md): Installation of a tail pipe extension. · Erickson Air Crane Inc. dba Erickson Air-Crane - [STC SH579NW](https://openairdocs.org/stc/SH579NW.md): Install Vickers hoist pump, APU starter motor and handpump for rotor brake system. · Erickson Air Crane Inc. dba Erickson Air-Crane - [STC SH580NW](https://openairdocs.org/stc/SH580NW.md): Install Vickers hoist pump, APU starter motor and handpump for rotor brake system. · Erickson Air Crane Inc. dba Erickson Air-Crane - [STC SH581NW](https://openairdocs.org/stc/SH581NW.md): Installation of a hydraulic hand pump on the rotor brake system · Erickson Air Crane Inc. dba Erickson Air-Crane - [STC SH726NW](https://openairdocs.org/stc/SH726NW.md): Installation of Erickson EAC-4675 tail pipe extension · Erickson Air Crane Inc. dba Erickson Air-Crane - [STC SH738NW](https://openairdocs.org/stc/SH738NW.md): Installation of Erickson EAC-4675 tail pipe extension · Erickson Air Crane Inc. dba Erickson Air-Crane - [STC SR00502SE](https://openairdocs.org/stc/SR00502SE.md): Fabrication and installation of Erickson Model 10333-101 (S-64E) or 10333-103 (S-64F) Water/Foam Cannon system · Erickson Air Crane Inc. dba Erickson Air-Crane - [STC SH264WE](https://openairdocs.org/stc/SH264WE.md): Installation of Aero-Craft Hydrulics, Inc, Auxiliary power unit (APU) starter motor P/N ACH-3911-205SPCL. · Aero-Craft Hydraulics, Inc - [STC SR00477SE](https://openairdocs.org/stc/SR00477SE.md): Installation of Erickson Model 10333-101 water/foam cannon system. · Erickson Air Crane Inc. dba Erickson Air-Crane - [STC SH5692NM](https://openairdocs.org/stc/SH5692NM.md): Installation of fire fighting system manufactured and installed. · Erickson Air Crane Inc. dba Erickson Air-Crane - [STC SH5733NM](https://openairdocs.org/stc/SH5733NM.md): Installation of fire fighting system. · Erickson Air Crane Inc. dba Erickson Air-Crane - [STC SH5102NM](https://openairdocs.org/stc/SH5102NM.md): Modification to disarm the external load jettison system. · Erickson Air Crane Inc. dba Erickson Air-Crane - [STC SH4756NM](https://openairdocs.org/stc/SH4756NM.md): Use of Mobil Oil Corp. SHC 626 synthetic oil in the main, intermediate and tail gearboxes. · Erickson Air Crane Inc. dba Erickson Air-Crane - [STC SH546NW](https://openairdocs.org/stc/SH546NW.md): Installation of an electronic weighting system (for monitoring cargo and/or hoist hook weight) · Measurement Systems Intl - [STC SH263WE](https://openairdocs.org/stc/SH263WE.md): Installation of hoist pump(yoke type), P/N ACH60552L6. · Aero Craft Hydraulics Inc - [STC SH606NW](https://openairdocs.org/stc/SH606NW.md): Install AiResearch motor driven fan for transmission cooling system. · Erickson Air Crane Inc. dba Erickson Air-Crane - [STC SH607NW](https://openairdocs.org/stc/SH607NW.md): Installation of mechanical release system for external cargo hook. · McCallister Engineering Enterprises ## 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 = '8142604' UNION ALL SELECT stc_number, 2, 'engine', matched_model FROM 'https://openairdocs.org/data/latest/faa_engine_model_stc.parquet' WHERE engine_model_code = '52047') 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/N154AC/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.