What was found
PSEU PANELS 12AB,14AB,16AB,23AB,25AB,26AB,28AB,10AB,17AB,19CDE IAW AMP 35-21 DUE TO NOT DEPLOYING HAVE BEEN REMOVED. REPLACED WHOLE AIRCRAFT PASSENGER OXYGEN DISPENSING BOX SEATS1 THRU 29 WITH SERVICEABLE PARTS FROM A/C 8307 PER A220 AMP 35-21- 01AAA-720A-A,STILL NEEDS C/B CLOSED AND OXYGEN SYSTEM DEPLOYMENT TEST. PAX COMPARTMENT OXYGEN MASK DEPLOYMENT GOOD ,REF BD500-A-J35-21-00-01AAA-320BA. (LP# 1691594; AIRCRAFT WAS GROUNDED)