# N720HT: Helicopter Transport Services CH-54B - Status: Valid registration - Airframe: [Helicopter Transport Services CH-54B](https://openairdocs.org/model/helicopter-transport-services-ch-54b) (registry code 4450003, 7 seats) - Engine: [Pratt & Whitney JFTD12A series](https://openairdocs.org/engine/pratt-whitney-jftd12a-series) (registry code 52047) - Data sheets: [TCDS H14NM](https://openairdocs.org/tcds/H14NM) (Helicopter Transport Services LLC), [TCDS E15EA](https://openairdocs.org/tcds/E15EA) (Erickson Incorporated DBA Erickson Air-Crane) (OpenAirDocs) - Serial number: 69-18463 - Type: Rotorcraft - Engine type: Turbo-shaft - Airworthiness: Restricted, agriculture and pest control, forest, other - Airworthiness date: July 16, 2003 - Certificate issued: April 12, 2018 - Expires: April 30, 2028 - Mode S code: A9A44D - Registered owner: [US Leaseco Inc](https://openairdocs.org/faa-owner/US%20LEASECO%20INC) - Location: [Aurora, OR](https://openairdocs.org/faa-place/OR/Aurora) - Owner type: Non-citizen corporation - Owner's area on the map: 45.2403° N, 122.7936° W: Placed by OpenAirDocs at the center of ZIP code 97002, within about 4 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based - FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=720HT - Page: https://openairdocs.org/aircraft/N720HT From the FAA registry file of October 22, 2026. ADs below are matched by the registry's airframe and engine model codes. They may apply; each AD's applicability can narrow it by serial number, part number or installed equipment. This is not a compliance determination. The registry lists only the engine series, so ADs for every Pratt & Whitney JFTD12A model are included. ## ADs that may apply (OpenAirDocs): 4 in force ### Matched by airframe (Helicopter Transport Services CH-54B) - [AD 99-15-14](https://openairdocs.org/ad/99-15-14): Main Gearbox Assembly · Helicopter Transport Services CH-54B. Effective Aug 26, 1999 - [AD 76-06-01](https://openairdocs.org/ad/76-06-01): Hydraulic Pumps · Erickson Air-Crane S-64A, S-64E, S-64F and 12 more. Effective Mar 24, 1976 ### Matched by engine (Pratt & Whitney JFTD12A series) - [AD 97-02-13](https://openairdocs.org/ad/97-02-13): Disk rupture · Pratt & Whitney Division JFTD12A-4A (T73P-1) and JFTD12A-5A (T73-P-700). Effective Apr 4, 1997 - [AD 71-24-05](https://openairdocs.org/ad/71-24-05): Compressor Rotor Discs · Pratt & Whitney Division JFTD12A-4A (T73P-1), JFTD12A-5A (T73-P-700), JT12A-6 and 2 more. Effective May 31, 1974 ## Information bulletins (advisory) None matched. ## NTSB investigations None matched to N720HT. ## FAA accident and incident reports None matched to N720HT. ## Service difficulty reports None filed for this aircraft. Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model. ## STCs that may be installed (OpenAirDocs) (29) Approved for this aircraft's airframe or engine model, in force first, then newest. The registry doesn't record which STCs an aircraft has; its records do. ### Approved for the airframe (Helicopter Transport Services CH-54B) - [STC SR02807SE](https://openairdocs.org/stc/SR02807SE): Installation of a Fly Away Tool box. Helicopter Transport Services LLC - [STC SR11923SE](https://openairdocs.org/stc/SR11923SE): Installation of Helicopter Transport Services, LLC Shock Absorber HTS-2000. Helicopter Transport Services LLC - [STC SR11810SE](https://openairdocs.org/stc/SR11810SE): Installation of Helicopter Transport Services, LLC External Load Indicating System. Helicopter Transport Services LLC - [STC SR02777SE](https://openairdocs.org/stc/SR02777SE): Installation of a Load Beam. Helicopter Transport Services LLC - [STC SR02754SE](https://openairdocs.org/stc/SR02754SE): Installation of External Cargo Container. Helicopter Transport Services, LLC - [STC SR02717SE](https://openairdocs.org/stc/SR02717SE): Installation of Helicopter Transport Services Remote Fuel Sump System. Helicopter Transport Services LLC - [STC SR09913AC](https://openairdocs.org/stc/SR09913AC): Installation of Composite Main Rotor Blade. Helicopter Transport Services LLC - [STC SR02684SE](https://openairdocs.org/stc/SR02684SE): Installation of Helicopter Transport Services, LLC (HTS) lightweight firefighting refill pump. Helicopter Transport Services LLC - [STC SR02671SE](https://openairdocs.org/stc/SR02671SE): Installation of HTS Attachable Service Pod. Helicopter Transport Services LLC - [STC SR00004SE](https://openairdocs.org/stc/SR00004SE): Fabrication and installation of Erickson fire fighting system. Erickson Air Crane Inc. dba Erickson Air-Crane - [STC SR00815SE](https://openairdocs.org/stc/SR00815SE): Fabrication and installation of Erickson Model Sea Snorkel system. Erickson Air Crane Inc. dba Erickson Air-Crane - [STC SR01209SE](https://openairdocs.org/stc/SR01209SE): Installation of Replacement Electric Starter for Auxiliary Power Unit. Helicopter Transport Services LLC - [STC SR01241SE](https://openairdocs.org/stc/SR01241SE): Installation of Concorde RG-390E Lead Acid Battery. Helicopter Transport Services LLC - [STC SR02503SE](https://openairdocs.org/stc/SR02503SE): Installation of Additional Telemetry Unit (ATU). Helicopter Transport Services LLC - [STC SR00928SE](https://openairdocs.org/stc/SR00928SE): Fabrication of Kawak Aviation Technologies, Inc. Model YB02854 Auxiliary Hydraulic System. Helicopter Transport Services LLC - [STC SR02055SE](https://openairdocs.org/stc/SR02055SE): 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): 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 SR01084SE](https://openairdocs.org/stc/SR01084SE): Fabrication and installation of HTS-OCB-001 Electric Oil Blower Assembly. Helicopter Transport Services LLC - [STC SR01268SE](https://openairdocs.org/stc/SR01268SE): Fabrication and installation of the Single Point Fixed Pendant. Helicopter Transport Services LLC - [STC SR01279SE](https://openairdocs.org/stc/SR01279SE): Installation of the Aero-Craft Utility Hydraulic Pump, Part Number (P/N) AP6VSPL. Helicopter Transport Services LLC - [STC SR01376SE](https://openairdocs.org/stc/SR01376SE): Fabrication and installation of Helicopter transport Services, LLC offset pilot seat, offset collective control, and bubble door. Helicopter Transport Services LLC - [STC SR01571SE](https://openairdocs.org/stc/SR01571SE): Fabrication and installation of Helicopter Transport Services, Inc. (HTSI) Automatic Flight Control System (AFCS). Helicopter Transport Services LLC - [STC SR01741SE](https://openairdocs.org/stc/SR01741SE): Installation of an upgraded Fuel Quantity Indicating System. Helicopter Transport Services LLC - [STC SR01839SE](https://openairdocs.org/stc/SR01839SE): Remove the components from the hydraulic sled at Station 380 and install on the sled at Station 435.5, and remove the sled at Station 380,. Helicopter Transport Services LLC - [STC SR02036SE](https://openairdocs.org/stc/SR02036SE): Modification of main rotor blade part number 6415-20601-041, -042, and -043. Helicopter Transport Services LLC - [STC SR02224SE](https://openairdocs.org/stc/SR02224SE): Installation of the Helicopter Transport Services, LLC (HTS) lightweight firefighting refill pump, Part Number HTS2-PUMP. Helicopter Transport Services LLC - [STC SR01618SE](https://openairdocs.org/stc/SR01618SE): Fabrication and Installation of Kawak Aviation Technologies Model 36100 Sea Snorkel. Helicopter Transport Services LLC - [STC SR00931SE](https://openairdocs.org/stc/SR00931SE): Fabrication of Simplex Model 314 Fire Attack System. Simplex Manufacturing Company - [STC SA4302NM](https://openairdocs.org/stc/SA4302NM): Installation of Electronics Int'l digital automatic engine analyzer. Electronics International ## Related - Other Helicopter Transport Services CH-54B aircraft: https://openairdocs.org/model/helicopter-transport-services-ch-54b/aircraft.md - The Pratt & Whitney JFTD12A series engine: https://openairdocs.org/engine/pratt-whitney-jftd12a-series.md --- 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.