Below are some important tables frequently used in query's in Oracle Apps for Fixed Assets module. 
FA_ADDITIONS_B           Descriptive information about assets 
FA_ADDITIONS_TL          Translated Descriptive information about assets
FA_ADJUSTMENTS           Adjustment information on assets user by 
                         General Ledger to create journal entry lines 
                         in the general ledger  
FA_ASSET_HISTORY         Historical information about asset  
                         reclassification and unit adjustments 
FA_ASSET_INVOICES        Accounts payable and purchasing information 
                         for each asset  
FA_BOOKS                  Financial information of each asset  
FA_BOOK_CONTROLS          Control information that affects all assets 
                          in a depreciation book  
FA_CALENDAR_PERIODS       Detailed calendar information  
FA_CATEGORIES_B           Default financial information for asset 
                          categories 
FA_CATEGORY_BOOKS         Default financial information for an asset 
                          category and depreciation book combination 
FA_DEPRN_DETAIL           Depreciation amounts charged to the 
                          depreciation expense account in each 
                          distribution line 
FA_DEPRN_PERIODS Information about each depreciation period
FA_DISTRIBUTION_ACCOUNTS Table to store account ccids for all
FA_DEPRN_PERIODS Information about each depreciation period
FA_DISTRIBUTION_ACCOUNTS Table to store account ccids for all
                          distributions for a book
FA_DISTRIBUTION_HISTORY Employee, location, and Accounting Flexfield
FA_DISTRIBUTION_HISTORY Employee, location, and Accounting Flexfield
                          values assigned to each asset 
FA_RETIREMENTS Information about asset retirements and
FA_RETIREMENTS Information about asset retirements and
                          reinstatements