What was found
EICAS DISPLAYED E1 FUEL LOW PRESSURE FAIL IN FLIGHT. DECLARED EMERGENCY RESCUE MSN FLT DELAYED TILL AM. FOLLOWED QRH, CABIN PRESSURE ALTITUDE READING 10100 IN DESCENT AT 1300, RISING IN CLIMB AND CONTINUED RISING IN DESCENT UNTIL LEVEL AT 8000 THEN REMAINED AT AIRCRAFT ALTITUDE. FLIGHT CREW PLACARDED E1 FUEL LOW PRESS MESSAGE REF 28-13. REMOVED AND REPLACED E1 LOW PRESSURE SWITCH IAW AMM 28-45-01, OPS AND LEAK CK GOOD, MEL RESTORED. REMOVED AND REPLACED DIGITAL CONTROLLER PER AMM 21-31-01. OPC GOOD PER AMM 21-31-00. AIRCRAFT PRESSURIZES IN AUTO AND MANUAL MODES NORMALLY AT THIS TIME. DIGITAL CONTROLLER P/N 22250N030301 S/N 187.