FAA-listed STC holder

Cascade STC LLC STCs

The Jun 30, 2026 FAA DRS snapshot lists 3 selected supplemental type certificates with status Current under Cascade STC LLC. The records span 16 public aircraft directories and 3 modification categories. This is a research directory, not a claim that any specific kit or service is currently offered.

listed Current at snapshot

aircraft directories

modification categories

Dec 22, 2015

latest recorded revision

Modification mix

Other aircraft modifications1 Engine and powerplant1 Landing gear and brakes1

Aircraft represented

MD Helicopters 369FF49 STCs MD Helicopters 369D47 STCs MD Helicopters 369E47 STCs MD Helicopters 500N40 STCs MD Helicopters 369F37 STCs Robinson Helicopter R2230 STCs Robinson Helicopter R22 ALPHA28 STCs Robinson Helicopter R22 BETA28 STCs MD Helicopters 369HE25 STCs MD Helicopters 369HS25 STCs Robinson Helicopter R22 MARINER24 STCs MD Helicopters 369HM22 STCs MD Helicopters 369H18 STCs MD Helicopters 369A13 STCs MD Helicopters 600N13 STCs MD Helicopters 36910 STCs

Recently revised records

Showing the 3 most recently revised records. Category directories provide the complete paginated discovery path.

3 displayed records.

Search every indexed record for this holder. The table below contains the recently revised records shown on this page.

Cascade STC LLC supplemental type certificates, aircraft applicability, source status and dates
STC and modification	Aircraft / model / TC	Source status and dates	Holder and authority
SH4344NM Replace existing fiberglass strut leg fairings with aluminum fairings. Other aircraft modifications View record	MD Helicopters 369TC H3WE MD Helicopters 369ATC H3WE MD Helicopters 369DTC H3WE MD Helicopters 369ETC H3WE MD Helicopters 369FTC H3WE MD Helicopters 369FFTC H3WE MD Helicopters 369HTC H3WE MD Helicopters 369HETC H3WE MD Helicopters 369HMTC H3WE MD Helicopters 369HSTC H3WE MD Helicopters 500NTC H3WE	Current at cited snapshot Revised Dec 22, 2015 Application: Jul 26, 1988	FAA holder: Cascade STC LLC FAA authority record
SH4909NM Replace the aft engine compartment heat blanket with a stainless steel firewall. Engine and powerplant View record	MD Helicopters 369TC H3WE MD Helicopters 369ATC H3WE MD Helicopters 369DTC H3WE MD Helicopters 369ETC H3WE MD Helicopters 369FTC H3WE MD Helicopters 369FFTC H3WE MD Helicopters 369HTC H3WE MD Helicopters 369HETC H3WE MD Helicopters 369HMTC H3WE MD Helicopters 369HSTC H3WE MD Helicopters 500NTC H3WE MD Helicopters 600NTC H3WE	Current at cited snapshot Revised Dec 22, 2015 Application: Dec 11, 1989	FAA holder: Cascade STC LLC FAA authority record
SR00197SE Addition of strug leg fairings to landing gear. Landing gear and brakes View record	Robinson Helicopter R22TC H10WE Robinson Helicopter R22 ALPHATC H10WE Robinson Helicopter R22 BETATC H10WE Robinson Helicopter R22 MARINERTC H10WE	Current at cited snapshot Revised Dec 22, 2015 Application: Apr 12, 1995	FAA holder: Cascade STC LLC FAA authority record

Modification mix

Aircraft represented

Recently revised records

Replace existing fiberglass strut leg fairings with aluminum fairings.

Replace the aft engine compartment heat blanket with a stainless steel firewall.

Addition of strug leg fairings to landing gear.