L/HIRF Analysis in Non-LHSI Projects
Projects that use MSG-3 guidelines that do not support identification of L/HIRF Significant Items — i.e., guidelines prior to Revision 2015 and the Revision 2015 guidelines that do not specify LHSI identification — are considered non-LHSI projects. In these projects, you can perform lightning/high intensity radiated field analysis for zones that have L/HIRF protection. The command will be available if you have answered "Yes" for this condition in the zonal analysis selection questions.
The rating system is configurable at the database level. (See Configurable Options for Zonal and L/HIRF Analysis.)
Adding or Deleting an Analysis
To add a new L/HIRF analysis tab, select an eligible zone in the zonal hierarchy (based on your answers for the zonal analysis selection questions) and choose Zones > Analyses > Add L/HIRF Analysis.
To delete an analysis, select a tab in the Analysis panel and then choose Zones > Analyses > Delete Analysis. (Remember there is no undo for delete.)
Using the L/HIRF Tab
Top Section: Protection Systems
The top section of the L/HIRF analysis tab allows you to list and describe all of the L/HIRF protection systems in the zone.
To add a new protection system description, choose Zones > L/HIRF Protection > Add Protection System.
To view or edit the complete description for one of the protection systems in the list, select the row and double-click or choose Zones > L/HIRF Protection > Edit Protection System.
Middle Section: Ratings
The middle section of the L/HIRF analysis tab allows you to perform the L/HIRF environmental damage/accidental damage (ED/AD) analysis, using the following rating system:
- Hostility of Environment: A set of ratings that are used to classify a variety of environmental factors (such as exposure to corrosive products, condensation, etc.).
- Susceptibility to Damage: A set of ratings that are used to classify the likelihood of damage during manufacturing, operation of the aircraft or maintenance practices.
The Hostility of Environment/Susceptibility to Damage score is assigned based on a scoring matrix that considers the worst rating for any of the hostile environment factors and the worst rating for any of the accidental damage types. You can click the 
icon to see the matrix.
Bottom Section: Tasks
The bottom section of the tab allows you to define any maintenance tasks that are recommended based on the ED/AD analysis.
To add a new task, choose Zones > Tasks > Add Task.
To view or edit the properties of an existing task, select the task and choose Zones > Tasks > Edit Task.
For information about the task properties, see L/HIRF Analysis Tasks.