As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EE COOLING SYS DIFFERENTIAL PRESS SWITCH S613 FAILED STEP B 4 A OF ROUTINE CARD. PERFORMED SATISFACTORY OPERATIONS CHECK OF EE COOLING SYS DIFFERENTIAL PRESS SWITCH IAW AMM 21-58-00 WITH NO DISCREPANCIES FOUND AFTER PIN 2 INSERTED ON DIFFERENTIAL PRESS SWITCH CONNECTOR IAW SWPM 20-61-00.