What was found
WHILE PERFORMING 'NEW INSP REQUIREMENT, FOUND SQUIB POWER SWITCH DISLOCATED FROM MAIN ENG FIRE EXTINGUISHER ANNUNCIATOR/ACTUATOR ASSY. FOUND SQUIB SWITCH MODULE NOT PROPERLY RETAINED BY TABS ON ANNUNCIATOR BODY. THIS CONDITION WAS FOUND ON 2 ASSYS OUT OF 6 CHECKED. NEW REPLACEMENT ASSY FOUND ONLY MARGINALLY BETTER FOR RETENTION OF SQUIB SWITCH MODULE ON AFT END OF ANNUNCIATOR/ACTUATOR ASSY. SUGGEST A CHANGE IN DESIGN OF THE ASSY FOR POSITIVE ATTACHMENT OF SQUIB POWER SWITCH. NOTE: CONDITION FOUND ON THE TWO ASSYS WOULD PREVENT FLT CREW FROM BEING ABLE TO DISCHARGE AFFECTED ENG FIRE BOTTLES AT ANYTIME. ALSO, THERE IS NO WAY FOR CREW TO PRE-FLIGHT SYS TO VERIFY FIRE BOTTLE SQUIBS WOULD BE BLOWN IF NEEDED.