We recommend you taking the backup of your data first before going for SSD replacement of your MacBook Air 2014. The same can be copied back on new SSD post successful installation.
The only solution to fix broken or cracked LCD of MacBook Air 2014 is to replace the entire Display (Top) panel.
MacBook Air 2014 Display Replacement will come with 1 Year Warranty.
Genuine OEM parts with One Year Warranty will be used for your MacBook Air 2014 Battery Replacement.