Section and subsection numbers below correspond to those in Chapter 6.
Aircraft takeoff and landing weights, crash impact velocities, and angle of impact data for
various types of aircraft have been provided on a generic basis in the Data Development
Technical Support Document (TSD) for Chapter 5 (Reference 1) and the technical support
document for Chapter 6 (Reference 2). When a site-specific aircraft hazard study is performed,
there is a likelihood that all aircraft types applicable to that site may not be found in
Reference 1. To determine the critical aircraft missile characteristics, it may be necessary to
use both generic data from Reference 1 and data from the site-specific aircraft impact hazard
study (see also Section C.126.96.36.199a). The use of site-specific hazard study results would permit
exclusion of those aircraft types, subcategories, or even categories that are not applicable to
C.6.1.1 Adverse Effects.
Most safety-related SSCs of a facility are within a building or are located so that barriers may
protect them from direct impact from aircraft missiles. For such SSCs, aircraft impact
evaluation essentially consists of determining the structural adequacy of these buildings and
barriers against local damage and excessive global deformation. After the buildings and
barriers are assessed to be structurally adequate, it must be established that the vibratory
loads resulting from aircraft impact would not adversely affect the safety function of the SSCs
that are within the building, behind the barriers, or supported from the building/barriers.
C.6.3.1 Missile and Target Selection.
This section provides more detailed guidance on the selection of missles and targets for the
structural analysis. The most important part of this process is the identification of a
representative aircraft for each subcategory to be used for the impact analysis. Since each
subcategory may contain aircraft of different sizes, masses, numbers of engines, locations of