Narrative:

Flight was the end of a 2 day with 2 late night finishes. While taxiing to the ramp after landing; the captain asked me to set the airplane up for single engine taxi. As per SOP; I disconnected the #2 generator when he told me he was clear of the steering. Then the captain asked me to shut down the #2 engine. In my tired state; I reached down and shut the engine master switch for the #1 engine; leaving the aircraft with 'no' electrical power (except batteries). After realizing what I had done; I re-engaged the #2 generator; which caused the steering and brakes to move erratically. The captain was taxiing slowly; so nobody was injured; nor was anything damaged. The passenger probably just noticed that the aircraft had gone dark. After parking normally at the gate; I explained to the captain that I was so tired that I had shut off the wrong engine master switch. I feel that I had succumbed to acute fatigue caused by 2 late nights in a row; just after completing a previous trip with 2 early mornings in a row. I am not a careless pilot; but rather feel that I had become so tired at the end of the flight that I didn't discern the difference between the #1 and #2 engine master switches. Rather than remaining focused; I was operating off of gross motor skills and rote memory; which got me in trouble. Please let other pilots know not to let their vigilance ease until they are standing on the jetbridge (or; better yet; in their driveway).

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Original NASA ASRS Text

Title: DURING TAXI IN A319 FO TURNS OFF NUMBER 2 GENERATOR THEN SHUTS OFF NUMBER 1 ENGINE REMOVING ALL ELECTRICAL POWER. FATIGUE FROM FOUR DAYS OF FLYING IS CITED AS CAUSE.

Narrative: FLT WAS THE END OF A 2 DAY WITH 2 LATE NIGHT FINISHES. WHILE TAXIING TO THE RAMP AFTER LNDG; THE CAPT ASKED ME TO SET THE AIRPLANE UP FOR SINGLE ENG TAXI. AS PER SOP; I DISCONNECTED THE #2 GENERATOR WHEN HE TOLD ME HE WAS CLR OF THE STEERING. THEN THE CAPT ASKED ME TO SHUT DOWN THE #2 ENG. IN MY TIRED STATE; I REACHED DOWN AND SHUT THE ENG MASTER SWITCH FOR THE #1 ENG; LEAVING THE ACFT WITH 'NO' ELECTRICAL PWR (EXCEPT BATTERIES). AFTER REALIZING WHAT I HAD DONE; I RE-ENGAGED THE #2 GENERATOR; WHICH CAUSED THE STEERING AND BRAKES TO MOVE ERRATICALLY. THE CAPT WAS TAXIING SLOWLY; SO NOBODY WAS INJURED; NOR WAS ANYTHING DAMAGED. THE PAX PROBABLY JUST NOTICED THAT THE ACFT HAD GONE DARK. AFTER PARKING NORMALLY AT THE GATE; I EXPLAINED TO THE CAPT THAT I WAS SO TIRED THAT I HAD SHUT OFF THE WRONG ENG MASTER SWITCH. I FEEL THAT I HAD SUCCUMBED TO ACUTE FATIGUE CAUSED BY 2 LATE NIGHTS IN A ROW; JUST AFTER COMPLETING A PREVIOUS TRIP WITH 2 EARLY MORNINGS IN A ROW. I AM NOT A CARELESS PLT; BUT RATHER FEEL THAT I HAD BECOME SO TIRED AT THE END OF THE FLT THAT I DIDN'T DISCERN THE DIFFERENCE BTWN THE #1 AND #2 ENG MASTER SWITCHES. RATHER THAN REMAINING FOCUSED; I WAS OPERATING OFF OF GROSS MOTOR SKILLS AND ROTE MEMORY; WHICH GOT ME IN TROUBLE. PLEASE LET OTHER PLTS KNOW NOT TO LET THEIR VIGILANCE EASE UNTIL THEY ARE STANDING ON THE JETBRIDGE (OR; BETTER YET; IN THEIR DRIVEWAY).

Data retrieved from NASA's ASRS site as of May 2009 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.