ST09101AC-D
Modification to the environmental control system to provide for two independent temperature control zones for the passenger cabin. Held by L3Harris Technologies Integrated Systems L.P., which holds 38 approved modifications in all. Last revised May 4, 2023. System: cabin, seats and restraints.
What it applies to
- Kind of product
- Aircraft
- Design holder
- The Boeing Company
- Models
- 737-700 Series
- Type certificate
- A16WE
- On this site
- Boeing 737 2,893 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 21, 2026.