B727 FO RPT ON LOSING SOME CABIN PRESSURE AND FEELING THAT HIS SUBSEQUENT PERFORMANCE WAS AFFECTED BY THAT HIGHER CABIN ALT. HE LATER EXCEEDED SPD LIMITS IN THE CLASS C AIRSPACE AND EXCEEDED FLAP EXTENSION SPDS DURING APCH. CLAIMS SHORT TERM MEMORY LOSS; SYMPTOMS OF HYPOXIA.

Narrative

I WAS FLYING WITH A NEW CREW. WHILE ON THE GND; THE FE IDLY PAGED THROUGH THE LOGBOOK. HE POINTED TO THE PART THAT SAID IT WAS A 2 PACK PLANE AND MUMBLED THAT HE WAS GOING TO RUN 1 PACK. I DIDN'T TAKE HIM SERIOUSLY AND I DON'T THINK THE CAPT DID EITHER. IT WAS MY LEG. I LEVELED OFF AT FL290. SOME TIME LATER; WE HEARD A BEEPING SOUND. AFTER A FEW SECONDS WE REALIZED THAT IT WAS THE CABIN ALT WARNING HORN. AS I GRABBED MY MASK THE CAPT SAW WHAT THE FE HAD DONE. HE ORDERED HIM TO PUT ON THE OTHER PACK. HE THEN TURNED TO ME AND SAID; 'DON'T PUT THE MASK ON; IT'S OK NOW;' SO I HUNG IT UP. SOME TIME AFTER THAT; I WAS GIVEN A DSCNT CLRNC. INSTEAD OF DOING THE MATH IN MY HEAD; I JUST STARTED DOWN. SOMEWHERE AROUND FL200 I BEGAN TO WONDER WHY I WAS DSNDING SO FAR OUT. I ASKED THE CAPT TO REPEAT THE CLRNC AND IT TURNED OUT I WAS 40 MI EARLY. I SHALLOWED IT OUT. TO COMPLICATE MATTERS; WE WERE APCHING BUFFALO FROM THE W. IT WAS FOGGY (YET VFR) THERE; AND THE DME IS 4 MI E OF THE ARPT. I COULDN'T SEE THE FIELD AS I FLEW OVER LAKE ERIE. EVERYTHING WAS HAZY AND GRAY AS I ACCOUNTED FOR THE NON CO-LOCATED DME. NEXT THING I REMEMBER; I FORGOT THAT IT WASN'T CO-LOCATED. I HAD CROSSED THE LAKE SHORE AND STILL COULDN'T SEE THE RWY. NORMALLY I WOULD BE STARTING TO CONFIGURE 10 MI OUT. I LOOKED AT THE DME AND IT SAID 8 (REALLY 4 OR 5). I WAS 250 KTS CLEAN ON THE GS. I DIDN'T KNOW I WAS SO CLOSE UNTIL TWR TOLD A PLANE TO HURRY UP AND TAKE OFF BECAUSE OF US. INSTEAD OF PUTTING SPD BRAKES OUT; I USED GEAR AND FLAPS. I EXCEEDED THE FLAP LIMITATIONS ALL THE WAY DOWN. I CROSSED THE THRESHOLD 20 KTS FAST AND SPOOLED UP 2 SECONDS BEFORE TOUCHDOWN. I TALKED TO A RELATIVE WHO IS A DOCTOR AND THE OPINION WAS THAT I WAS VERY HYPOXIC. MY SYMPTOMS WERE: IMPAIRED JUDGEMENT; MENTAL UNCOORD; MEMORY LOSS. FLYING A NIGHT SCHEDULE DIDN'T HELP EITHER.