SR02684SE
Installation of Helicopter Transport Services, LLC (HTS) lightweight firefighting refill pump. Held by Helicopter Transport Services LLC, which holds 27 approved modifications in all. Last revised March 27, 2020. System: other and general.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Erickson Incorporated DBA Erickson Air-Crane; Erickson Incorporated DBA Erickson Air-Crane; Helicopter Transport Services LLC; Helicopter Transport Services LLC; Helicopter Transport Services LLC; Siller Helicopters LLC
- Models
- S-64E, S-64F, CH-54B, CH-54A, CH-54A, CH-54A
- Type certificates
- H6EA, H6EA, H14NM, H16NM, R00009SE, H18NM
- On this site
- Erickson S-64 5 registered
Helicopter Transport Services CH-54 5 registered - The FAA's record
- On the FAA's site
What an approved modification is
A supplemental type certificate is the FAA's approval of a change to a certified design: a new engine or propeller, avionics, an autopilot, floats, a parachute, a larger fuel tank, an ice-protection kit. The company holding it may sell the kit and the paperwork to owners of the listed models; the modification then becomes part of that aircraft's record. The FAA's list says what was approved and for which models, not how many aircraft carry it.
Source: FAA supplemental type certificates (Dynamic Regulatory System). Register counts from the FAA register of October 7, 2026.