ALTDEV ALT OVERSHOT IN CLB.

Narrative

I CHKED OUT ON THE 757/767 BTWN FEB/XX/95 AND MAR/XX/95; FLEW MY IOE MAR TO MAR. ALL THE TRAINING WENT RELATIVELY SMOOTHLY TO MY SURPRISE; SINCE I HAD NEVER FLOWN ANY GLASS COCKPIT ELECTRIC; OR FMS ACFT IN ANY SEAT BEFORE. YY IOE MADE ME HIGH ON TIME FOR MARCH; SO MY REMAINING TRIPS WERE DROPPED. OUR VACATION YR STARTED APR; AND I WAS CONVERTED FROM 727 TO 757/767 ON THAT DATE AND ASSIGNED A VACATION THE FIRST 2 WKS OF APR. HENCE; I'M FLYING MY FIRST TRIP AFTER MORE THAN A MONTH OFF. FOR PRACTICE; I WAS HAND FLYING; OBLIVIOUS TO THE FACT THERE'S NO AUTO LEVELOFF PROTECTION WITHOUT THE AUTOPLT. J-58 TAKES A BIG JOG AT SRQ. I RECALLED THE FREQ FOR SRQ AND 288 DEGS OUTBOUND; BUT MY COPLT WAS GETTING HIS MAP OUT TO DOUBLE-CHK. WITH THE VARIOUS HDG CHANGES; WE WEREN'T SURE WHICH LEG OF J-58 WE WERE SUPPOSED TO INTERCEPT. I FLEW RIGHT THROUGH FL260; AND WE REALIZED IT WHEN THE ALT ALERT SOUNDED AT FL262.5. WE GOT TO FL263 BEFORE I GOT US STARTED BACK DOWN. CTR CALLED US AS WE WERE PASSING FL261 AND SAID HE HAD US AT FL264; AND THAT HE HAD SBOUND TFC AT FL270. WE LOCATED THAT TFC ABOUT 20 MI AWAY -- WE HAD HIM VISUALLY (EVERYONE HAD LENGTHY CONTRAILS) AND ON TCASII -- AND CAME NO CLOSER THAN 11 MI. CAUSE: I WAS INEXPERIENCED. MY COPLT DIDN'T EXPECT HIS CAPT TO BE HAND FLYING THAT HIGH; AND MAINLY; WE WERE BOTH DISTRACTED BY THE CTLR'S SOMEWHAT CONFUSING DIRECTIONS WHICH WERE NOT ONLY UNCLR; BUT REQUIRED USING LITTLE USED MAPS AND REPROGRAMMING THE FMS. GOING A MONTH OUT OF A BRAND NEW AND VERY DIFFERENT COCKPIT IS FUNDAMENTALLY DANGEROUS; AND EVEN THE NEWEST REGULATIONS ON THAT SUBJECT DO NOT GO FAR ENOUGH. SUPPLEMENTAL INFO FROM ACN 302407: A NEW CLRNC WAS GIVEN TO INTERCEPT AN AIRWAY AND WE WERE MONITORING NAV INTERCEPT.