BEECH 23 SKIPPER PLT UNFAMILIAR WITH AGC ARPT INADVERTENTLY TURNED OFF RWY AFTER LNDG ONTO ANOTHER RWY DUE TO LACK OF TXWY AND ACFT LIGHTING.

Narrative

AFTER A LONG FLT; I LANDED ON RWY 28 AT ALLEGHENY COUNTY ONE EVENING. THE OVCST OBSCURED ANY MOONLIGHT I MIGHT HAVE USED TO SEE THE ARPT SURFACE. I WAS ALSO SURPRISED TO DISCOVER THAT AGC DOESN'T HAVE TXWY LIGHTING; A FACT NOT MENTIONED IN THE AFD OR ON ANY CHART. AS THE AIRPLANE ROLLED TO A STOP; I STRUGGLED TO FIND THE TXWY ENTRANCE WITH MY MEAGER LNDG LIGHT. I SAW THE 'A3' SIGN AND A BREAK IN RWY LIGHTING; SO I TURNED THE AIRPLANE OFF THE RWY AND RPTED CLR. THE CTLR REPLIED THAT I WAS ON RWY 31 AND TOLD ME TO 'TURN ONTO TXWY A; USE CAUTION; TXWY IS UNLIGHTED.' APPARENTLY; I TURNED ABOUT 20 FT TOO SOON FOR 'A3.' THE ISSUE OF GREATER SAFETY CONCERN CAME TO MY ATTN AS I LOOKED TO ENTER 'A.' I TOLD THE CTLR I DIDN'T SEE THE 'A' SIGN. HE SAID I WAS PAST IT AND TO TURN R WHERE I WAS. UPON DOING THIS; I SAW I WAS HEADED FOR SOME PYLONS! 'UH; YOU SEEM TO BE IN A NON MOVEMENT AREA; USE CAUTION MOVING BTWN THE PYLONS;' HE SAID; AND ISSUED INSTRUCTIONS TO THE FBO RAMP. FORTUNATELY; THE PYLONS WERE SHORT AND I STEERED THROUGH THEM AND PARKED WITH NO MORE DIFFICULTY. THIS EMBARRASSING EXPERIENCE STARTED WITH MY FATIGUE FROM A LONG FLT IN IMC. IT CONTINUED WITH MY CURSORY VIEWING OF THE ARPT DIAGRAM. I EXPECTED TO BE ISSUED TAXI INSTRUCTIONS ON ROLLOUT; AND WHEN THAT DIDN'T HAPPEN; I PUT GETTING OFF THE RWY AHEAD OF POSITIONAL AWARENESS. ONCE I WAS ON RWY 31; I STUDIED THE ARPT DIAGRAM; WHICH SHOWED A LARGE WHITE AREA IN THE VICINITY OF 'A.' I FIGURED THIS WAS GRASS; BUT IN FACT IT WAS PAVED; UNLIGHTED; AND MARKED WITH PYLONS ONLY ON THE RAMP SIDE. APPARENTLY; EVEN THE CTLR DIDN'T KNOW THE FULL EXTENT OF THIS AREA WHEN IT WAS ENVELOPED IN A NEAR TOTAL DARKNESS. I RECOMMEND THAT ALL NON MOVEMENT AREAS OF THIS TYPE BE ILLUMINATED WITH RED LIGHTS. IT MIGHT ALSO BE GOOD TO HAVE DIFFERENT SYMBOLOGY ON THE DIAGRAM FOR GRASS AND PAVED NON MOVEMENT AREAS; AND A NOTATION OF 'NO TAXI LIGHTING' WOULD BE NICE; TOO. FINALLY; TO MYSELF; I RECOMMEND PAYING MORE ATTN TO SAID DIAGRAM AND BUYING A NEW LNDG LIGHT! CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATED THAT WHEN HE COMMENTED ON THE LACK OF TXWY LIGHTING; HE WAS NOT REFERRING TO THE ENTIRE ARPT TXWY LIGHTING; BUT JUST THE LACK OF LIGHTING IN THE AREA TO WHICH HE HAD TURNED OFF THE RWY. HOWEVER; HE BELIEVED THAT THE MOST IMPORTANT PROB WAS THE PYLON CONES SET ON THE OPEN AREA BTWN THE RWY AND TXWY WERE PLACED FOR THE BENEFIT OF TAXIING OUT FROM THE RAMP AREA AND NOT THE ACFT TAXIING IN AFTER LNDG.