As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT FORWARD BOOST PUMP LOW PRESSURE LIGHT ILLUMINATED DURING CLIMB. RTF. RTF AGAIN FOR SAME PROBLEM. *S/D* THE PRESSURE LIGHT ILLUMINATION WAS DUE TO FAILURE OF S70 PRESSURE SWITCH. THE SWITCH WAS REPLACED AND OPERATION OF THE LOW PRESSURE INDICATING CIRCUIT HAS BEEN NORMAL.