The U.S. aircraft register, updated daily
Approved modifications · supplemental type certificate · current · issued

SE5584SW

Propeller shaft oil seal. Held by Page Industries, INC, which holds 4 approved modifications in all. Last revised November 21, 1983. System: engine.

What it applies to

Kind of product
Engine
Design holder
Pratt & Whitney Division; Pratt & Whitney Division; Pratt & Whitney Division; Pratt & Whitney Division
Models
Wasp S1H1, Wasp S1H2, R-1340-59, Wasp S3H1
Type certificates
E-129, E-129, E-142, E-143
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.