ST01983WI
Installation of a folding stair in the main entrance for models equipped with a side-hinged main door. Held by Worldwide Aviation Engineering LLC, which holds 4 approved modifications in all. Last revised August 31, 2023. System: airframe structure.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Yaborã Indústria Aeronáutica S.A.; Yaborã Indústria Aeronáutica S.A.; Yaborã Indústria Aeronáutica S.A.; Yaborã Indústria Aeronáutica S.A.; Yaborã Indústria Aeronáutica S.A.; Yaborã Indústria Aeronáutica S.A.; Yaborã Indústria Aeronáutica S.A.; Yaborã Indústria Aeronáutica S.A.; Yaborã Indústria Aeronáutica S.A.; Yaborã Indústria Aeronáutica S.A.; Yaborã Indústria Aeronáutica S.A.
- Models
- EMB-135ER, EMB-135KE, EMB-135KL, EMB-135LR, EMB-145, EMB-145EP, EMB-145ER, EMB-145LR, EMB-145MP, EMB-145MR, EMB-145XR
- Type certificates
- T00011AT, T00011AT, T00011AT, T00011AT, T00011AT, T00011AT, T00011AT, T00011AT, T00011AT, T00011AT, T00011AT
- On this site
- Embraer EMB-135 ERJ 135 and Legacy 119 registered
Embraer EMB-145 ERJ 145 313 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.