What was found
L1 DOOR AFT DRIVE CHAIN BROKEN. REPLACED L1 DOOR AIR MOTOR CHAIN PN SK11863-32 IAW DWG ABA 7941. L1 DOOR AIR MOTOR REPLACED IAW AMM 52-11902-2. L1 DOOR ELEC MOTOR CHAIN DRIVE SPROCKET BEARINGS PN B541DDFS428, TWO REPLACED IAW SOPM 20-10-7. L1 DOOR ELEC ACTUATOR SHAFT PN ABA 7939-501 REPLACED IAW DWG ABA-7941. L1 DOOR ELECTRIC ACTUATOR SHAFT SPACER PN ABA 8014-529 REPLACED IAW DWG ABA-7941. L1 DOOR MAIN DRIVE CHAIN PN SK11863-88 REPLACED IAW AMM 52-11-00-5. OPERATIONAL TEST OF EMER ACTUATION SYS PERFORMED IAW WC 52C1301, CHECKED GOOD.