The use of Hand-held fire extinguishers containing Halon in Aircraft will become prohibited end of 2025 and you will need to replace all them.

Installation of NVIS aircraft lighting modification for a Sikorsky S-61 Helicopter. Night Vision Imaging System (NVIS) modifications are required to maximize visual acuity and safety while operating an aircraft with night vision goggles (NVGs).

ASU offers nearly 40 STCs covering more than 80 makes and models of rotary and fixed-wing aircraft. 

Limit the standard passenger seating configuration to 19 or less on the Sikorsky S-61N rotorcraft

Limit the standard passenger seating configuration to 9 or less.

Installation of two or three tank fuel quantity indicating systems when installed

Removal of seats in passenger cabin to limit the maximum seating to nine passengers per Carson Helicopters, Inc. Report No. CHI-1000 latest revision. Limited to installation on serial numbers 61216, 61220, 61242, and 61744 ONLY that have been modified to short fuselage configuration.

Replacement of existing landing and/or hover light bulbs with Light Emitting Diode (LED) lighting system

Removal of a 50 inch section from the forward fuselage between stations 110 and 160 and reinstallation of forward cabin with associated fabricated parts. (S-61L, S-61N Transport Category ONLY)

Heli-One offers installation of Breeze 29700 Stand by Rescue hoist installation in S-61N. The standby hoist wiill be in addition to existing hoist.