SP755NW
Installation of O ring seal in place of crush gasket in accordance with FAA Sealed Pacific Propeller, Inc. Draing List No. 7020, dated March 5, 1979, or later FAA sealed revision thereto. Held by Pacific Propeller International LLC, which holds 27 approved modifications in all. Last revised March 25, 2004. System: propeller.
What it applies to
- Kind of product
- Propeller
- Design holder
- Hamilton Standard Division
- Models
- 12D
- Type certificate
- P-257
- 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.