FAA · Type Certificate Data Sheet

TCDS 6A1

Twin Commander Aircraft LLC

Current Aircraft Small Airplane Rev 49 11/18/2024 drs.faa.gov ↗

Models covered (15)

Special Airworthiness Information Bulletins (3)

Advisory bulletins on these airframes. Not mandatory like ADs — but operators tracking AD compliance often miss the SAIB on the same component.

2023-14 Landing Gear Retract/Extend System
NM-14-08 Fuselage: Aerodynamic Fairings
CE-12-19 Fuel: Aircraft Fuel System on Cessna Model 500/501/550 Airplanes

Special Conditions + ELOS findings

Certification-time deviations: SCs add requirements where the design is novel; ELOS allows alternative compliance. Most modern types have both.

ELOS ST5826NY-T-P-1 Digital Display of Engine High Pressure Rotor Speed
ELOS ST0757AK-T-S-1 FlightLogic System
ELOS TD4930WI-T-SE Light assembly
ELOS AT4267WI-T-P-1 Engine installation as a limitation
ELOS ST4383WI-T-SE-1 Non-stabilized magnetic compass

Certification basis — 14 CFR

Former holders

Twin Commander Aircraft Corporation
Gulfstream\Twin Commander Aircraft Corporation
Gulfstream

The TCDS PDF on drs.faa.gov is the authoritative document for design-as-certified weight limits, performance, equipment, AD compliance times, and operating limitations. Open on drs.faa.gov ↗ DRS frequently breaks — when it does, the fleet view above and the cross-links below are usually what you actually need.