The U.S. aircraft register, updated daily
Special conditions · aircraft

Special Conditions: Associated Air Center, Boeing Model 747-8 Airplane; Installation of an Airbag System To Limit the Axial Rotation of the Upper Leg on Single-Place Side-Facing Seats

Special conditions are rules the FAA writes for one design when the standard certification rules do not cover something new about it. These were published August 2, 2016 for Associated Air Center (Aac). System: cabin, seats and restraints.

What it applies to

Applicant
Associated Air Center (Aac)
Makes
Boeing
Models
—
Published
August 2, 2016
Effective
April 10, 2000
The FAA's document
On the FAA's site

The FAA's summary their words, unchanged

These special conditions are issued for the Boeing Model 747- 8 airplane. This airplane, as modified by Associated Air Center, will have a novel or unusual design feature when compared to the state of technology envisioned in the airworthiness standards for transport- category airplanes. This design feature is an airbag system to limit axial rotation of the upper leg, due to leg flail, of occupants in single-place side-facing seats. The applicable airworthiness regulations do not contain adequate or appropriate safety standards for these design features. These special conditions contain the additional safety standards that the Administrator considers necessary to establish a level of safety equivalent to that established by the existing airworthiness standards.

Source: FAA special conditions (final) from the Dynamic Regulatory System; the Federal Register carries the same notices.