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

SP1318GL

Installation of replacement electrothermal type de-icing boots. Held by Rapco, INC, which holds 11 approved modifications in all. Last revised August 4, 1988. System: propeller.

What it applies to

Kind of product
Propeller
Design holder
Hamilton Standard Division; Hartzell Propeller Inc.; Hartzell Propeller Inc.; Hartzell Propeller Inc.; Hartzell Propeller Inc.; Hartzell Propeller Inc.; Hartzell Propeller Inc.; Hartzell Propeller Inc.; Hartzell Propeller Inc.; Hartzell Propeller Inc.; Hartzell Propeller Inc.; Hartzell Propeller Inc.; Hartzell Propeller Inc.; Hartzell Propeller Inc.; Hartzell Propeller Inc.; Hartzell Propeller Inc.; Hartzell Propeller Inc.; Hartzell Propeller Inc.; Hartzell Propeller Inc.; Hartzell Propeller Inc.; Hartzell Propeller Inc.; Hartzell Propeller Inc.; McCauley Propeller Systems; McCauley Propeller Systems; McCauley Propeller Systems; McCauley Propeller Systems; McCauley Propeller Systems; McCauley Propeller Systems; McCauley Propeller Systems; McCauley Propeller Systems; McCauley Propeller Systems; McCauley Propeller Systems; McCauley Propeller Systems; TRW Hartzell Propeller; TRW Hartzell Propeller; TRW Hartzell Propeller; TRW Hartzell Propeller
Models
33LF, HC-83X, HC-B3Z, HC-A3X, HC-C2Y, BHC-C2Y, HC-B3T, HC-A2V, HC-C3YR-2, EHC-C3YR-2, HC-C3YK-1, PHC-C3YF-2, HC-C3YN-2, HC-C3YK-2, HC-B3P, HC-E3Y, PHC-J3Y, BHC-J2Y, HC-B4T, HC-B5M, HC-A3V, HC-E2Y, 2A36, D3A32C, 3AF32C, F2A34C, D2A34C, E2A34C, 3FF32C, D3A34C(4, D3A32C(4, 3AF32C(5-), 3GFR34C7( ), HC-83V, HC-B3R, HC-B3W, HC-F3Y
Type certificates
P20EA, P-884, P-907, P-913, P-920, P-920, P15EA, P24EA, P25EA, P25EA, P25EA, P25EA, P25EA, P25EA, P29EA, P33EA, P36EA, P37EA, P40EA, P44GL, P6EA, P9EA, P-880, P21EA, P22EA, P3EA, P3EA, P3EA, P45GL, P47GL, P47GL, P57GL, P60GL, P14EA, P28EA, P2EA, P31EA
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.