thods, techniques, and , practices '.0er AC 43.13-1A4.-Chpi.15:6:04C..43.13,2A -Chott.: 1t6._24.. , . • _ . VII: 'intiallation- waefoiktiohally Itettedat ground level. end at'altitude dUring -performance check- flighti;ihd:.operitedsatisfactorily-404tdid:hOt adversly affect the operation. of .anY'.1)