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

SR01813CH

Install Fargo Manufacturing Co. 52.5-gallon, crashworthy auxiliary fuel tank manufactured pursuant to STC SR01238CH, 55-gallon auxiliary fuel tank manufactured pursuant to STC SR505CH, or 28-gallon auxiliary fuel tank manufactured pursuant to STC SR000964CH on the aft cabin baggage bay floor of MD Helicopters, Inc. Model MD900 configured with MD Helicopters, Inc. 31-gallon, under baggage bay floor supplementary fuel tank. Held by Fargo Manufacturing CO., which holds 11 approved modifications in all. Last revised February 7, 2020. System: fuel system.

What it applies to

Kind of product
Aircraft
Design holder
MD Helicopter Inc.
Models
MD900
Type certificate
H19NM
On this site
Md Helicopters Inc MD 900 11 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 8, 2026.