The Helicopter Technology Company (HTC) UH-1 Part Number 204P2100-103 Main Rotor Blade is FAA Certificated to be interchangeable in any combination with the Bell 204-011-250-113 blade.


The HTC Blade is certificated for 2,600 hours life while the Bell Blade is certificated for 2,500 hours.


Additionally, the Airworthiness Directive (AD) for the 25 Hour Special Inspection is Not Applicable on the HTC 204P2100-103 Blade.


In order to demonstrate these statements, attached are the following documents:


1)      The FAA Supplemental Type Certificate (STC) which identifies the Make/     Models the HTC Blade is FAA Certificated to fly on. This document is signed by the FAA.  The effective FAA Certificated Model List is: UH-1H, UH-1B*, TH-1F, UH-1F, UH-1P, 204B, 205A, and 205A-1 (*with STC SR00026DE Tail Boom Extension Installed)

2)      The HTC Master Document List (MDL-204-2100-01) which is identified in the above STC.

3)      The HTC Installation and Maintenance Manual (HTCM-006) which is also identified in the above STC and contains the Instructions for Continued Airworthiness (ICA).   Sheets 29 through 32 of this manual identify the FAA Approved Interchangeability, Aircraft Applicability, and Life Limitations.

This document is approved and signed by the FAA.

Helicopter Technology Company (HTC) is pleased to report that Transport Canada has formally accepted their STC for the 204P2100-103 Main Rotor Blade applicable on various Huey Models. STC # SR02492LA will be entered in the national index of STCs that have been reviewed and accepted by Transport Canada for installation on Canadian-registered aeronautical products. 

The  letter that confirms formal acceptance of the referenced STC by Transport Canada.

The pricing to is quite favorable over the Bell part number.  Additionally, we generally have blades in-stock able to be shipped immediately.


Main Rotor Blade Features :

  • FAA Certificated Interchangeable in any combination with
    BHT 204-011-250-113 Blade

  • Titanium Single-Piece Lower Grip Plate

  • Additional 48 inch (1219 mm) Stainless Steel Abrasion Strip at Tip            

  • 7075 Aluminum Alloy Spar           

  •  High Visibility Paint Schemes Available


HTCM-006 UH-1 Main Rotor Blade Installation and Maintenance Manual

We have done our research on these blades by talking to those who have been flying them.  This is what we have heard:

Blades Balance quickly, saving time for maintenance crew
and operators

Fly Smoothly both high and low speed & high and low altitude
leading to better performance because of this smooth flight

Less aiframe maintenance due to the smoother performance
Blades are available immediately while Bell Blades currently have one year lead time
Manufacturer offers outstanding customer service.

Commercial Bell Models     

 204B:      2,600 hours
 205A:      2,600 hours
 205A-1:   2,600 hours
UH-1 Models:
 UH-1H:    2,600 hours
 TH-1F:     2,600 hours
 UH-1F:    2,600 hours
 UH-1P:    2,600 hours
 UH-1B:    2,600 hours **
**with STC SR00026DE Tail Boom Extension Installed

Additional 48" (1219 MM)
Stainless Steel Abrasion Strip

For Immediate Release




Helicopter Technology Company (HTC) is pleased to announce they are now offering an Upgraded Version of their Metal Main Rotor Blades for commercial Bell Helicopters 204B, 205A, and 205A-1 along with various UH-1 model restricted category helicopters.  The HTC Part Number 204P2100-103 Main Rotor Blade is a direct replacement the Bell Helicopter - Textron Part Number 204-011-250-113 Main Rotor Blade and an upgrade to the HTC Part Number 204P2100-101 blade.


The New -103 Blade offers a Titanium Single-Piece Lower Grip Plate that is Not Subject to the Current 25 hour Special Inspection.  The existing Bell -113 and HTC -101 configurations have a laminate of Aluminum and Steel.  By changing to the Titanium Single-Piece Grip, the possibility of dis-bonding between the two laminates will be eliminated. The -103 is not subject to AD 2018-02-07- Blade Inspection that requires inspection every 25 hours or two weeks.


HTC’s President states “We recognized that an upgrade was needed to the Main Rotor Blade Grips…  We chose Titanium for Greater Strength and worked to get it Certificated and into Production for UH-1 Operators…  This upgrade will provide Greater Safety and eliminate the need for the AD that was Requiring Inspections every 25 Hours.”


Part Number 204P2100-103 Main Rotor Blade Features:

·         FAA Certificated Interchangeable in any combination with BHT 204-011-250-113 Blade and

the HTC 204P2100-101 Blade

·         Titanium Single-Piece Lower Grip Plate

·         Additional 48 inch (1219 mm) Stainless Steel Abrasion Strip at Tip

·         7075 Aluminum Alloy Spar

·         High Visibility Paint Scheme


Main Rotor Blade Life Limit of 2,600 Hours on:

Commercial Bell Models 204B, 205A, and 205A-1

Restricted Category UH-1 Models UH-1H,UH-1B*, TH-1F, UH-1F, and UH-1P

*with STC SR00026DE Tail Boom Extension Installed


Installation of this Blade is Fully Interchangeable and covered by FAA Supplemental Type Certificate (STC) Number SR02492LA.


About Helicopter Technology Company (HTC):  HTC designs and produces its own line of Helicopter Main and Tail Rotor Blades at its Facilities in Los Angeles, California.  The company is an FAA Approved Production Approval Holder (PQ2115NM-D), FAA Part 145 Repair Station (HQPR671X), and EASA Approved Repair Station (EASA.145.6708) with ISO 9001:2015 + AS9100D and ISO 9001:2015 + AS9110C Certifications.  Company Strengths include:  Structural Design, Structural Testing, Non-Destructive Testing (NDT), Tool Design and Fabrication, Metal-to-Metal Bonding, Structural Assembly, and Flight Testing.  HTC was formed in 1994 and has Rotor Blades in Service in more than 50 countries around the world.

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