AN ACR B757 FLC HAS THE L HYD SYS LOSE FLUID DURING FLAP AND SLAT EXTENSION ON FINAL APCH. ALSO SOME OF THE LOST FLUID WAS INGESTED INTO THE AIR CONDITIONING INTAKE.

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WITH EXTENSION OF GEAR AND FLAPS WE GOT A TRAILING EDGE LIGHT INDICATING FLAP DISAGREEMENT FROM SELECTED POS. INDICATOR SHOWED ALMOST 20 DEGS FLAPS AND GEAR WERE DOWN AND LOCKED. SO; DECISION WAS MADE TO CONTINUE TO LAND. EICAS STATUS CHK SHOWED PARTIAL LOSS OF L HYD SYS. LNDG WAS NORMAL AND WHEN CLR OF RWY; SYS LEAK WAS PLUGGED AND ACFT TOWED TO THE GATE. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR IS A B757-200 CAPT AND HE SAID THAT THEY WERE ABOUT 5 NM ON FINAL APCH WHEN HE REALIZED THAT THERE WAS A HYD PROB. HE SAID THAT HE HAD CALLED FOR FLAPS TO 30 DEGS AND THEY HAD STOPPED AT 19 OR 20 DEGS. HE DECIDED TO RECOMPUTE HIS APCH SPD BASED ON THE INDICATED FLAP POS AND CONTINUED TO A LNDG IN HIS PRESENT CONFIGN. HE SAID THAT HE CANNOT REMEMBER ALL OF THE EICAS MESSAGES THAT THEY RECEIVED DURING THE APCH; BUT ONE OF THEM SHOWED THAT A SMALL AMOUNT OF HYD FLUID REMAINED IN THE L SYS. DURING THE LAST PORTION OF THE APCH AND THE LNDG ROLLOUT A STRONG ODOR OF HYD FLUID ENTERED THE CABIN AND FLT STATION SO AFTER COMING TO A STOP ON THE HIGH SPD TXWY HE SHUT DOWN THE L ENG. HE SAID THAT HE THOUGHT THAT THE L ENG HAD INGESTED THE FLUID AS IT LEAKED FROM THE ENG DRIVEN HYD PUMP. INSTEAD; HE LATER DISCOVERED THAT THE LEAK WAS FROM A FLAP OR SLAT ACTUATOR (HE COULD NOT REMEMBER) AND THE FLUID HAD BEEN INGESTED INTO THE AIR CONDITIONING INTAKE. HE HAD NOT INITIALLY DECLARED AN EMER ON FINAL BECAUSE THE FLC WAS TOO BUSY. HOWEVER; AFTER LNDG HE RPTED THE PROB TO THE TWR AND THEY SENT THE CFR EQUIP. AFTER BEING TOWED TO THE GATE; THE PAX DEPLANED; APPARENTLY; WITHOUT INJURY.