SC521661 Invoice Number: 5517132452 Step: 15.1.1 Waiting approval Avionics Engineering Labor Avionics (L/P/S) Step: 15.1.2 Waiting approval Mech Engr Labor Avionics (L/P/S) Step: 15.13 Waiting approval AVI Systems Test Labor Only (L/P/S) Step: 15.1.4 Waiting approval AVI /Electrical Labor Only (L/P/S)