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

SH6039NM

Intermixing of main rotor blades of the same part number. Held by Heli-Support INC, which holds 2 approved modifications in all. Last revised July 29, 2004. System: rotorcraft systems.

What it applies to

Kind of product
Aircraft
Design holder
Eurocopter France; Eurocopter France; Eurocopter France; Eurocopter France; Eurocopter France
Models
SA.315B Alouette III, SA.316B Alouette III, SA.316C Alouette III, SA.319B Alouette III, SE.3160 Alouette III
Type certificates
H1IN, H1IN, H1IN, H1IN, H1IN
On this site
Aerospatiale SA315 22 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 7, 2026.