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

SR00318BO

Installation of external Cargo Hookup Mirror. Held by Firefly INC., which holds 6 approved modifications in all. Last revised January 27, 2012. System: other and general.

What it applies to

Kind of product
Aircraft
Design holder
Robinson Helicopter Company
Models
R66
Type certificate
R00015LA
On this site
Robinson R66 421 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.