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

ST00030DE

Installation of tanks and dump system for fire fighting liquid suppressant. Held by Hawkins & Powers Avn INC, which holds 14 approved modifications in all. Last revised May 5, 1993. System: other and general.

What it applies to

Kind of product
Aircraft
Design holder
Hawkins & Powers Aviation Inc.
Models
HP-C-130A (Restricted Cat.)
Type certificate
A30NM
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.