RWY TRANSGRESSION.

Narrative

COMPLACENCY. AFTER ALL MY YRS AT AVIATION SCHOOL ENROLLED IN SAFETY CLASSES; I THOUGHT I WOULD NEVER BECOME COMPLACENT. IT WAS MY 4TH LEG OF THE DAY AND THE NEW CAPT AND I WERE TAXIING TO THE PAD AT THE RWY 09L/12 INTXN AT MIAMI. THE PAX HAD BEEN BRIEFED; THE BEFORE TAXI CHKLIST COMPLETED; AND WE WERE DOWN TO THE LINE ON THE BEFORE TKOF CHKLIST. THE CAPT AND I HAD BEEN PLAYING A GUESSING GAME TO SEE WHO COULD CORRECTLY GUESS THE HDG OR ALT ATC WOULD ASSIGN. SINCE BOTH OF US HAD FLOWN TO KEY WEST SEVERAL TIMES; ALWAYS DEPARTING RWY 12; WE BOTH HYPOTHESIZED A HDG OF 160 DEGS AFTER TKOF. TWR CALLED AND COMMANDED; 'FLT XXX;' TAXI INTO POS AND HOLD RWY 09L.' I REPLIED; 'INTO POS AND HOLD RWY 09L.' AT THIS TIME; I REACHED FOR THE CHKLIST AND BEGAN READING BELOW THE LINE AS THE CAPT STARTED THE FINAL SEGMENT OF OUR TAXI. HAVING COMPLETE FAITH IN THE CAPT'S COGNITIVE SKILLS AND TAXI ABILITIES AND NOT CATCHING THAT RWY 09L FOR KEY WEST WASN'T THE USUAL RWY FOR A S DEP; I LIMITED MY ATTN TO INSIDE THE ACFT. WHEN I LOOKED UP; SOMETHING DIDN'T FEEL RIGHT. TWR CALLED; 'FLT XXX;' YOU ARE ON RWY 12; ACR 737 IS ON A 1 1/2 MI FINAL; L TURN TAXI TO RWY 9L. IMMEDIATELY I REALIZED WHY I DIDN'T FEEL RIGHT. NOT ONLY WAS THIS EVENT UNSAFE; IT WAS UNPROFESSIONAL AND A DIRECT REFLECTION OF COMPLACENCY. WE FLY 10 LEGS A DAY; DO 10 BEFORE TKOF CHKLISTS; AND PULL UP TO THE PAD ON EVERY FLT LEAVING MIAMI. IN THE BACK OF OUR MINDS WE WERE THINKING; KEY WEST -- RWY 12; KEY WEST -- RWY 12; KEY WEST -- RWY 12...I READ BACK 'TAXI INTO POS AND HOLD RWY 09L;' THE CAPT HEARD ME REPLY 'RWY 09L;' AND HE STILL TAXIED TO RWY 12. I ALWAYS TAKE TIME AND LOOK TO SEE IF ANY TFC IS ON FINAL BUT I WAS 'TOO BUSY' CONCENTRATING ON COMPLETING THE CHKLISTS INSTEAD OF MAINTAINING SITUATIONAL AWARENESS. THE CAPT ADMITTED HE WAS PREOCCUPIED WITH IRRELEVANT THOUGHTS AS WELL. AFTER THIS EVENT; I ELECTED TO READ BACK TO MYSELF AND THE CAPT ALL CLRNCS WHETHER I OR THE CAPT ANSWERED ATC. THE CAPT AGREED AND WE NOW COM AS WELL ON THE GND AS WE DO IN THE AIR. SAFETY IS AN ATTITUDE!