SA1824NM

Installation of Lompoc Aero Specialties inner plexiglass pane in swing out window frames presently employing a single window - in accordance with Lompoc Aero Specialties FAA sealed Eligibility List dated January 4, 1983, together with their FAA sealed Installation Instructions dated September 20, 1982, or later FAA approved revisions. Manufacturer of the windows is controlled by Lompoc Aero Specialties drawings LAS 1012 dated August 6, 1982, LAS 1013 dated October 5, 1982, and LAS 1014 dated October 6, 1982, or later FAA approved sealed revisions.I. Held by G & D Aero Products INC., which holds 18 approved modifications in all. Last revised January 23, 2004. System: airframe structure.

What it applies to

Kind of product: Aircraft
Design holder: The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company
Models: 172RG, 175A, 175B, 175C, P172D, R172E, R172F, R172G, R172H, R172J, R172K
Type certificates: 3A17, 3A17, 3A17, 3A17, 3A17, 3A17, 3A17, 3A17, 3A17, 3A17, 3A17
On this site: Cessna 172 Skyhawk 20,676 registered
Cessna 175 Skylark 925 registered
Cessna P172 23 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.