PA28 CARGO PLT LANDS ON CLOSED RWY WHICH IS NOTAMED CLOSED AND RPTR STATES AN 'X' ON THE RWY.

Narrative

THE EVENTS THAT LED TO MY LNDG ON A TEMPORARY CLOSED RWY ARE AS FOLLOWS: THE INCIDENT OCCURRED DURING MY SECOND FLT OF THE DAY TO GST FROM JNU. THE FOLLOWING DESCRIBES MY MISINTERP OF A NOTAM. APPROX 3 WKS PRIOR TO THE INCIDENT XX AIRLINES STARTED FLYING INTO GST FOR THE SUMMER; THEREBY PRODUCING A NOTAM STATING THAT 30 MINS BEFORE THE ACR ARRIVES TO 30 MINS AFTER DEP RWYS 1 AND 19 ARE CLOSED. DURING AN EARLIER FSS BRIEFING FOR A FLT TO GST I DIRECTLY QUERIED THEM ABOUT THE NOTAM AND THE RESPONSE WAS THAT THEY KNEW OF IT; BUT SEEMED UNSURE WITH ITS EXACT CONTENT. THE DEFINITIONS OF THE NOTAM THAT A FEW OF MY COMPANY PLTS SUPPLIED ME WITH WAS AS FOLLOWS: '30 MINS PRIOR TO LNDG TILL PARKED AND FROM PARKED TO 30 MINS AFTER TKOF; RWYS 1 AND 19 ARE CLOSED. THIS SEEMED LIKE A PLAUSIBLE DEFINITION BECAUSE THE JET IS PARKED (AS IT WAS WHEN I LANDED) A LONG WAY FROM THE RWY AND AT NO TIME DID THE JET COME CLOSE TO PRODUCING A HAZARD TO MY CRAFT OR VICE VERSA. ON APCH THE AWOS RPTED 'WIND 180 DEGS AT 8 KTS' AND NO MENTION OF THE DAILY NOTAM. SO I ASSUMED RWY 19 WOULD BE THE SAFEST. FACTORS CONTRIBUTING TO THE INCIDENT: BEING NEW TO THE AREA AND NEW TO THE COMPANY (1 WK SINCE FINISHING IOE). THIS BEING MY FIRST PART 135 JOB. TAKING THE WORD OF COMPANY PLTS; RATHER GOING BACK TO FSS. WHILE RWY 19 IS MARKED WITH AN 'X' IT ALSO MARKED WITH A '19' AND THUS ALSO CONTRIBUTED TO MY MISINTERP OF THE CLOSURE. LACK OF NOTAM ON AWOS. 'RWYS 19 AND 1 CLOSED FROM 30 MINS BEFORE (OR LCL TIME WOULD BE BETTER) AIRLINE ARR TO 30 MINS AFTER DEP.' I BELIEVE I'VE LEARNED A VALUABLE LESSON IN: BEING ALERT FOR POSSIBLE GAPS IN THE INFO I RECEIVE. GOING DIRECTLY TO FSS (THE HORSE'S MOUTH) FOR AS MUCH INFO AS POSSIBLE. MY PERSONAL FAVORITE. TAKING MORE TIME WHEN THE LEARNING CURVE IS STEEP; IE; GETTING A GRIP ON A NEW JOB AND NEW SURROUNDINGS.