B727-100 CREW DEPARTED RNO AND DID NOT HAVE THE REQUIRED SECOND OR THIRD SEGMENT ENG OUT-CLB REQUIREMENTS. THE COMPANY DOES NOT PROVIDE THE CREW WITH THE REQUIRED PERFORMANCE CALCULATIONS. THE COMPANY REQUIRES THE CREW TO CALCULATE THIS PERFORMANCE ON A LAPTOP COMPUTER.

Narrative

DEP WITH AN INCORRECT CALCULATION OF ACFT CLB GRADIENT PERFORMANCE. WE DEPARTED RWY 16L ON A MODIFIED PROFILE IN ORDER TO CLR ALL OBSTACLES ON THE SID. RWY 16R WAS CLOSED. THE MODIFICATION TO PROFILE WAS TO DELAY CLEAN-UP OF FLAPS UNTIL ABOVE OBSTACLE HT. LESSON ONE; THE COMPANY FOM DOES NOT STIPULATE MODIFYING PROFILE; BUT ONLY ALLOWS THE PROFILE TO BE FLOWN EXACTLY AS DESCRIBED IN THE FOM. MODIFIED CLBS CAN'T BE CALCULATED. WE REVIEWED THE CLB DATA PROVIDED BY THE ACFT PERFORMANCE COMPUTER. THE COMPUTER SHOWED OUR TKOF PERFORMANCE FOR CONDITIONS; CONFIGN; CARGO WT AND BAL; AND THE RWY SELECTED. OUR PERFORMANCE WAS ACCEPTABLE WITH OBSTACLE CLB CAPABILITY AS BEING THE LIMITING FACTOR FOR TKOF. I HAD ALWAYS BELIEVED THE ACFT PERFORMANCE COMPUTER WOULD AUTOMATICALLY CALCULATE CLB GRADIENT FOR DEP SID AS WELL. LESSON TWO: IT DOES NOT! WE LOOKED AT THE SID AND FELT THAT AN OLD B727-100 MIGHT HAVE A HARD TIME GETTING OUT OF RENO; AS HVY AS OURS WAS FOR THAT SID; SO WE BRIEFED AND FLEW THE MODIFIED PROFILE WHICH GAVE US AMPLE CLB PERFORMANCE. LESSON THREE: THE CORRECT PROC IS TO MANUALLY ENTER THE PROFILE INTO THE ACFT PERFORMANCE COMPUTER AFTER REVIEWING TKOF AND WT AND BAL. A PERFORMANCE CHART WILL BE GENERATED FOR VARIOUS ALTS ON DEP. THAT CHART IS THEN COMPARED TO THE REQUIRED CLB PERFORMANCE ON THE SID. OUR ACFT PERFORMANCE WAS LEGAL. OUR USE OF THE ACFT PERFORMANCE COMPUTER AND THEREFORE OUR DEP; WAS NOT.