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

SA5887SW

Installation of electrically driven vacuum pump as a standby auxilixary pump to the existing instrument air system. Held by Aero Safe Corporation, which holds 21 approved modifications in all. Last revised April 6, 2007. System: instruments and avionics.

What it applies to

Kind of product
Aircraft
Design holder
Cessna Aircraft Company; Cessna Aircraft Company
Models
172RG, R172K
Type certificates
3A17, 3A17
On this site
Cessna 172 Skyhawk 20,676 registered
Cessna R172 Hawk XP 758 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 20, 2026.