SA520NE
Installation of a Simmonds Precision Computerized Fuel Gauging System, with Volumetric Top-off Device in accordance with Simmonds Precision Installation Drawing List Report Number 2615, Revision A, dated April 8, 1987, or later FAA approved revision. Held by Simmonds Precision Products INC, which holds 25 approved modifications in all. Last revised January 6, 2005. System: other and general.
What it applies to
- Kind of product
- Aircraft
- Design holder
- The Boeing Company; The Boeing Company
- Models
- 737-100 Series, 737-200 Series
- Type certificates
- A16WE, A16WE
- On this site
- Boeing 737 2,887 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 12, 2026.