SA3938SW-D
Revise the existing TWA interior configuration from 21 first class, 52 business class, 364 tourist class to a new seating configuration of 29 first class, 78 business class, and 78 tourist class. Held by American Airlines INC, which holds 377 approved modifications in all. Last revised November 16, 1987. System: cabin, seats and restraints.
What it applies to
- Kind of product
- Aircraft
- Design holder
- The Boeing Company
- Models
- 747SP 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 21, 2026.