B717 ON CLIMB OUT RECEIVES SEVERAL ENGINE FAIL ALERT MESSAGES ON APPARENTLY FUNCTIONAL RIGHT ENGINE. RETURN TO DEP ARPT FOR MAINTENANCE.

Narrative

THE EVENT HAPPENED AS A RESULT OF ABNORMAL ENG READINGS AND SYS ALERTS. WHILE CLBING OUT OF APPROX 8500 FT; THE 'CONFIRM ENG OUT' PAGE CAME UP ON THE FO'S MCDU. AIRPLANE APPEARED TO BE CLBING NORMALLY BUT ENG INDICATIONS FOR THE L N1; TGT; AND N2; WERE LOWER THAN THE R SIDE (L N1 15% LOWER; TGT 150 DEGS COOLER; AND N2 10% LOWER). WE REQUESTED TO LEVEL AT 9000 FT MSL FROM APCH AND RECEIVED CLRNC TO DO SO. AS WE LEVELED; THE L 'ENG SYS FAIL' ALERT ILLUMINATED. FO GOT OUT QRH WHILE I CONTINUED TO FLY THE ACFT. WE SLOWED TO 210 KTS. REDUCING PWR BROUGHT ENG INDICATIONS IN LINE WITH ONE ANOTHER. WHILE READING QRH PROC; 'L FUEL PRESSURE LOW' ALERT ILLUMINATED. A CHK OF FUEL SCHEMATIC AND FUEL FLOWS INDICATED PROPER OP. GIVEN THE QRH; ABNORMAL ENG READINGS AT HIGHER PWR SETTINGS; AND 2 DIFFERENT ALERTS THE SAFEST COURSE OF ACTION DICTATED A RETURN TO ZZZ. ZZZ MAINT WAS CONSULTED. FLT ATTENDANTS AND PAX WERE ADVISED. DISPATCH WAS NOTIFIED REGARDING THE 'L ENG SYS FAIL' ALERT. RETURN AND LNDG WERE UNEVENTFUL AT THE LOWER PWR SETTINGS. WE LANDED AT 108000 LBS. WE RECEIVED SYS ALERTS WHILE INVESTIGATING ABNORMAL ENG INDICATIONS. ONCE IT WAS DETERMINED THAT THE ABNORMAL ENG INDICATIONS ALONG WITH SYS ALERTS COULD LEAD TO AN UNSAFE CONDITION ENRTE; WE ELECTED TO RETURN TO ZZZ. ONE ITEM I FAILED TO COMPLETE DURING THE COURSE OF THE AIR TURN-BACK WAS TO AMEND MY RELEASE. I THOUGHT I COMPLETED THAT TASK BUT I GOT DISTR DURING THE COURSE OF ORGANIZING AND COORDINATING THE RETURN PROCESS. NEXT TIME I WILL SET AN EXTERNAL TRIGGER OR WRITE MY THOUGHTS DOWN ON PAPER TO PROVIDE MYSELF WITH A CHKLIST OF TO-DO'S.