ST00001LB-D
Extend Business Class into D - Zone section, changing seat count from 36F-126C-184Y to 36F-123C-142Y. Remove (42) Coach Class seats and (3) Business Class seats. Rework (123) Business Class seats to provide 12" recline and install seats at increased 48" - 50" pitch in C-Zone, D-Zone, and Upper Deck. Install (2) outboard class divider curtains in D-Zone. This modification was accomplished in accordance with United Air Lines, DAS-1-WE, Approved Master Drawing List No. 00001 dated January 24, 1995, or later FAA approved revisions. Held by United Airlines INC, which holds 520 approved modifications in all. Last revised November 30, 2011. 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 21, 2026.