As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: WHEN CENTER FUEL TANK WAS EMPTY LEFT CENTER LOW PRESSURE LIGHT AND ASSOCIATED CAUTION DID NOT ILLUMINATE. THE LEFT CENTER PUMP WAS LEFT ON FOR AN EXTENDED TIME, BUT THE LOW PRESSURE CAUTION FROM THE LEFT PUMP NEVER ILLUMINATED. BULBS TEST GOOD. REPLACED LEFT CENTER TANK BOOST PUMP LOW PRESSURE SWITCH. OPS AND LEAKED CHECK GOOD. PER AMM 28-42-11.