What was found
DUE TO HISTORY OF INTERMITTENT ELEC/BURNING ODOR IN CABIN - SFO MX TO SUPPORT BOEING TEAM WITH ACCOMPLISHMENT OF AVO17290 TO T/S SOURCE OF ELECTRICAL/BURNING ODOR (3 REPORTS IN HISTORY) CARRIED BY ELB IN ADDITION, MX TO ADDRESS LP 8660388 (LEFT LWR RECIRC FAN - PLACED ON MEL DUE TO NON-CORRELATED MSG AT TIME OF LAST EVENT). LEFT LWR RECIRC FAN TO BE REPLACED PRIOR TO MEL BEING CLEARED. CONTACT TOMC WITH FINDINGS PRIOR TO CLEARING THIS LMC CORRECTION - DO NOT REMOVE THE LEFT LWR RECIRC FAN (CURRENTLY ON MEL) UNTIL DIRECTED BY ENGINEERING/TOMC AS THIS IS STILL BEING CONSIDERED AS A POTENTIAL SOURCE AND NEEDS TO BE RULED OUT BEFORE REPLACEMENT. UNLOCKING FOR SFO MX TO CLEAR ACCOMPLISHMENT OF AVO172900.