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

SA02279AK

Installation of dual Rockwell Collins FDS 2000 flight displays, dual AHS 3000 attitude and heading reference systems, dual Garmin GNS 530 navigation systems and supporting avionics equipment . Held by Acrohelipro Global Services USA INC, which holds 4 approved modifications in all. Last revised January 12, 2007. System: instruments and avionics.

What it applies to

Kind of product
Aircraft
Design holder
Sikorsky Aircraft Corporation; Sikorsky Aircraft Corporation; Sikorsky Aircraft Corporation; Sikorsky Aircraft Corporation
Models
S-61L, S-61N, S-61NM, S-61R
Type certificates
1H15, 1H15, 1H15, 1H15
On this site
Sikorsky S-61 54 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 22, 2026.