ST01020SE
Installation of the KLM B747-200/-300 Avionics Upgrade - Electronic Flight Instrument System (EFIS). Approval of this change in type design applies to the above model aircraft only, serial numbers 21110, 21111, 21549, 21550, 21659, 21660, 21848, 22376, 22379, 22380, 23056, 23137, and 23508. Held by Hollingsead International, which holds 124 approved modifications in all. Last revised November 16, 2009. System: instruments and avionics.
What it applies to
- Kind of product
- Aircraft
- Design holder
- The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company
- Models
- 747-200B Series, 747-200C Series, 747-200F Series, 747-300 Series
- Type certificates
- A20WE, A20WE, A20WE, A20WE
- On this site
- Boeing 747 192 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.