e above mentioned installation drawings were D.E.R. approved on Form 8110-3 dated 9-1.3-91, Midcoast File No. MC910261. Inspection requirements per Collins AVR-101 Airborne Voice, Recorder System Maintenance Manual .* 523-0757366-201114 15 Feb. 1968 2nd Revision. Perform the "Preflight Functional Test" and the "Additional S