SA3451WE
Installation of Hartzell HC-A3VK4/V7636D-0 or V7636N-0 constant speed propeller. Held by Aircraft Technical Service INC, which holds 15 approved modifications in all. Last revised May 27, 1980. System: propeller.
What it applies to
- Kind of product
- Aircraft
- Design holder
- The New Piper Aircraft Inc.
- Models
- PA-24-250
- Type certificate
- 1A15
- On this site
- Piper PA-24 Comanche 2,428 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.