Special Conditions; Boeing Model 747-400, Flight Deck Displays and Propulsion Control Systems
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 January 23, 1989 for Boeing. System: instruments and avionics.
What it applies to
- Applicant
- Boeing
- Makes
- Boeing
- Models
- —
- Published
- January 23, 1989
- Effective
- December 20, 1988
- 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 747-400 airplane. This airplane will have novel or unusual design features associated with the display of certain airplane system information that are not addressed in the existing regulations. In addition, the propulsion installation requirements of Part 25 do not contain adequate standards by which to determine an acceptable level of safety for a full authority digital electronic control system installed on a transport category airplane. These special conditions contain additional safety standards which will require proper displays and alerts of sufficient capacity to enable the crew to identify and perform required remedial action and will also require full authority digital electronic control systems (FADEC) to have the level of integrity and reliability of current hydromechanical systems. The Administrator finds these special conditions necessary to establish a level of safety equivalent is that established by the airworthiness standards of Part 25.
Source: FAA special conditions (final) from the Dynamic Regulatory System; the Federal Register carries the same notices.