Approved modifications · supplemental type certificate · current · issued

SE04840NY

Installation of HarcoSemco Exhaust Gas Temperature (EGT) Electrical Harnesses in CFM56-7 engine. Held by Kilroy Aviation LLC, which holds 6 approved modifications in all. Last revised February 6, 2024. System: engine.

What it applies to

Kind of product: Engine
Design holder: CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.
Models: CFM56-7B20, CFM56-7B20E, CFM56-7B22/3B1, CFM56-7B22E, CFM56-7B24/2, CFM56-7B24/3B1, CFM56-7B26/3, CFM56-7B26/B1, CFM56-7B26/3F, CFM56-7B26E/B1, CFM56-7B26E/F, CFM56-7B27AE, CFM56-7B26/3B2, CFM56-7B27/2, CFM56-7B27A/3, CFM56-7B27E/B3, CFM56-7B27E/B1F, CFM56-7B20/2, CFM56-7B22, CFM56-7B20/3, CFM56-7B22/2, CFM56-7B22/3, CFM56-7B22E/B1, CFM56-7B24, CFM56-7B24/B1, CFM56-7B24/3, CFM56-7B24E, CFM56-7B24E/B1, CFM56-7B26, CFM56-7B26/2, CFM56-7B26/3B1, CFM56-7B26/3B2F, CFM56-7B26/B2, CFM56-7B26E, CFM56-7B26E/B2, CFM56-7B26E/B2F, CFM56-7B27, CFM56-7B27A, CFM56-7B27/3, CFM56-7B27/3F, CFM56-7B27/3B1,...
Type certificates: E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00056EN, E00056EN, E00056EN, E00056EN, E00056EN, E00056EN, E00056EN, E00056EN, E00056EN, E00056EN, E00056EN, E00056EN, E00056EN, E00056EN, E00056EN, E00056EN, E00056EN, E00056EN, E00056EN, E00056EN, E00056EN, E00056EN, E00056EN, E00056EN, E00056EN, E00056EN, E00056EN, E00056EN, E00056EN, E00056EN, E00056EN, E00056EN, E00056EN, E00056EN, E00056EN, E00056EN, E00056EN, E00056EN, E00056EN, E00056EN, E00056EN, E00056EN, E00056EN, E00056EN, E00056EN, E00056EN, E00056EN, E00056EN, E00056EN
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 5, 2026.