B737-500 CREW HAD MULTIPLE SYS FAILURES IN ZOA CLASS E AND A AIRSPACES.

Narrative

THIS INCIDENT CHAIN STARTED SHORTLY AFTER TKOF OF THE OAK-SAN FLT. I WAS FLYING THE ACFT AND AFTER TKOF WE GOT A 'TCASII INOP; RADIO ALTIMETER #1; AND TCASII DISPLAY WARNINGS; WITH ATC ASKING TO CHK OUR XPONDER. THE CAPT CHKED CIRCUIT BREAKERS; RECYCLED ALL ASSOCIATED CIRCUIT BREAKERS AND TRIED #1 AND #2 XPONDER WITH NO EFFECT. ZOA RPTED THAT WE HAD NO XPONDER AND REQUESTED POS RPTS AND ALT CALLOUTS. ZOA CLRED US TO FL370; OUT OF FL180; AND IN THE MID 20'S. I CHKED THE CABIN; AND EVERYTHING WAS NORMAL. AS WE PASSED THROUGH FL350; THE CABIN ALT WARNING HORN WENT OFF. THE CAPT ALT INDICATOR SHOWED 10000 FT; THE CAPT ASKED FOR A DSCNT; AND OAK GAVE US FL290. THE CAPT ASKED AND RECEIVED CLRNC TO FL240. I INITIATED A DSCNT; AND OXYGEN MASKS WERE DONNED AND COMS WERE ESTABLISHED. THE ANALOG PRESSURIZATION SYS 'AUTO FAIL' LIGHT DID NOT COME ON. THE CAPT RAN THE QRH -- ALL CHKLISTS AND THE SYS WORKED IN THE STANDBY MODE. DURING OUR DSCNT; ZOA (34.55) SENT US TO LAX (26.52); THE CAPT CHKED IN AND CALLED OUT ALT PASSING AND DSNDING TO FL240. ZLA ACKNOWLEDGED THIS AND REQUESTED A RADAR FIX AT RZS VOR. SEVERAL MINS LATER; ZLA CALLED OUT TFC AT FL310 AND WE WERE AT FL240 AND 10 NM OUT OF RZS. ZLA WAS UNAWARE WE WERE AT FL240. CTR STATED THAT THERE WAS NO CONFLICT; BUT I WAS CONCERNED; BECAUSE WE WERE IN AND OUT OF IMC. THE CAPT ASKED IF HE NEEDED TO CALL ATC AND LAX SAID THEY WERE TRYING TO FIGURE OUT WHAT HAPPENED; WHEN AN ACR FLT CONFIRMED THE ZOA CLRNC TO FL240. ON DSCNT IN SAN THE 'LOW IDLE' LIGHT CAME ON; WITH THE THROTTLE AT IDLE. THE COMPLETION OF THE FLT WAS NORMAL WITH NO ADDITIONAL INCIDENTS. THE PREFLT; DISCUSSION WITH MAINT CTL; SAID THAT THE SYMPTOMS OF THE FLT POINT TO BE PARTIAL FAILURE OF THE AIR/GND SENSOR SYS. I FEEL WE AS A CREW PERFORMED THE CHKLISTS REQUIRED AND THEY DID NOT ADDRESS THE SIT WE HAD ENCOUNTERED.