ST01898CH
Installation of a B/E Aerospace Models 4.1 and 4.2 World Business Class (WBC) seats, plus Matsushita Audio Video on Demand (AVOD) system with portable electronic device (PED) outlets deactivated using Master Drawing List SA2521-01339-2, latest FAA approved revision. Held by Northwest Airlines INC, which holds 25 approved modifications in all. Last revised February 23, 2004. System: cabin, seats and restraints.
What it applies to
- Kind of product
- Aircraft
- Design holder
- The Boeing Company
- Models
- 747-400 Series
- Type certificate
- 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 8, 2026.