Special Conditions: Boeing Model 747-8/-8F Airplanes; Additional Airframe Structural Design Requirements Related to Sudden Engine Stoppage Due to Fan Blade Failures
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 11, 2009 for Boeing. System: engine.
What it applies to
- Applicant
- Boeing
- Makes
- Boeing
- Models
- —
- Published
- August 11, 2009
- Effective
- September 10, 2009
- The FAA's document
- On the FAA's site
The FAA's summary their words, unchanged
These special conditions are issued for Boeing Model 747-8/-8F airplanes. These airplanes will have a novel or unusual design feature(s) associated with an increased engine size when compared to previous model airplanes. These larger engines with larger bypass fans are capable of producing higher and more complex dynamic loads than previously experienced in older designs. The applicable airworthiness regulations do not contain adequate or appropriate safety standards for this design feature. 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.