SA2955SO
Replacement of existing electromechanical fuel quantity indicators with Smiths Industries digital fuel quantity indicators. Held by Ontic Engineering and Manufacturing INC., which holds 59 approved modifications in all. Last revised February 14, 2014. System: fuel system.
What it applies to
- Kind of product
- Aircraft
- Design holder
- The Boeing Company; The Boeing Company; The Boeing Company
- Models
- DC-10-10, DC-10-30, DC-10-40
- Type certificates
- A22WE, A22WE, A22WE
- On this site
- Douglas DC-10 8 registered
Mcdonnell Douglas DC-10 17 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 20, 2026.