Rev A Dated 7-99 407-1570-117, Rev A Dated 7-99 "Structural Analysis for Installation of Misc. Avionics on a bell 407 Helicopter, s/n 53375." "Installation of Avionics Equipment.' 'Gyro Mount' Inverter Top Hot, Static Inverter/Strobe Unit." NOTES: 1. The structural aspects only of the above data is approved herein. This