SA04404CH
Installation of Hartzell Propeller model (P)HC-C3YF-1RF/F8429 in accordance with Hartzell STC Installation Instruction INST-092518 Revision IR dated September 25, 2018 or later FAA Approved revisions. Airplane Flight Manual Supplement AFMS-092518 Revision IR dated September 25, 2018 or later FAA Approved revision is required. Instructions for Continued Airworthiness ICA-092518 Revision IR are applicable. Held by Hartzell Propeller INC, which holds 90 approved modifications in all. Last revised July 9, 2019. System: propeller.
What it applies to
- Kind of product
- Propeller
- Design holder
- Textron Aviation Inc.; Textron Aviation Inc.
- Models
- 185E, A185F
- Type certificates
- 3A24, 3A24
- 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 21, 2026.