A B717 AIR CONDITIONING MIXING MUFF MODIFICATION JOB CARD IS RPTED TO BE WRITTEN IN A DISORDERED AND UNCERTAIN MANNER.

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ON JAN/TUE/03; I RECEIVED ENGINEERING ORDER. AFTER A BRIEF REVIEW; I REALIZED PROBS. FIRST; THERE WERE XEROX COPIES OF COMPUTER SCANNED PICTURES THAT I COULD NOT COMPREHEND. THERE WERE REFS TO PIPE ASSEMBLIES THAT I COULD NOT IDENT. ALSO IN THE ILLUSTRATIONS; I COULD NOT IDENT THE REF TO SUPPORT WIRING (STEP 1.2.5). EVEN AFTER LOOKING AT THE ACFT; I STILL HAD A HARD TIME UNDERSTANDING WHAT WAS GOING ON; BECAUSE THE ILLUSTRATIONS ON THE ENGINEERING ORDER WERE BAD. I CONSULTED THE ENGINEER INVOLVED; AND HE PROCEEDED TO SHOW ME ON HIS COMPUTER A BEAUTIFUL COLORED PICTURE OF THE COMPONENTS/AREA INVOLVED. I IMMEDIATELY POINTED OUT THAT ON THE R ILLUSTRATION; IT SHOWED A WIRE HARNESS; BUT ON THE ACFT; THE HARNESS WAS RTED DIFFERENTLY. STEP 1.2.5 EXPLICITLY SAYS TO 'SUPPORT WIRES AS SHOWN IN FIGURE 839; WHEN IN ACTUALITY; THESE 'WIRES' AREN'T THERE! ON STEP 1.3.23 AND 1.3.29; THE ILLUSTRATION ONLY SHOWS THE L SIDE. HOWEVER; IT HAS A NOTE IN FIGURE 5 THAT SAYS 'THE TUBE ASSEMBLY FOR THE WATER DRAIN CONVECTION IS SHOWN INSTALLED ON THE REFRIGERATION UNIT USED ON THE L-HAND ACFT INSTALLATION. MAKE SURE THE TUBE ASSEMBLY AND CAP ARE REVERSED IN THE R-HAND ACFT INSTALLATION.' THE WAY I SEE IT -- IF THE VALVE ON THE L AND R WERE SYMMETRICAL -- FINE! BUT; THE R IS 30 DEGS DIFFERENT; THIS PUTS '4' PORTS IN A ROTATION THAT IS HARD TO INTERP. ON STEPS 1.3.29/1.2.23 FOR TUBES; BECAUSE THE R MIX/MUFF IS TURNED 30 DEGS (APPROX); THEY DO NOT FIT; HOWEVER; ON THE L -- THEY FALL INTO PLACE. AFTER CONSULTING WITH THE ENGINEER; HE SAID THE R SIDE SHOULD MIRROR THE L; SO WHY ARE YOU HAVING A PROB!? I INSISTED THAT HE LOOK AT THE ACFT. AFTER COMING DOWNSTAIRS TO TAKE A LOOK; HE AGREED IT WAS DIFFERENT! I SUGGESTED THAT; PERHAPS THE R SHOULD REQUIRE A DIFFERENT PART NUMBER FOR TUBES; BECAUSE OF THE ROTATION OF THE MIX/MUFF. AT THIS POINT; THE DIRECTOR/SUPVR WAS LOOKING OVER OUR SHOULDERS. HE EXPRESSED THAT WE MAKE IT FIT -- AFTER NUDGING ME ASIDE; HE PROCEEDED TO PHYSICALLY HAND 'YANK AND PULL' ON THE TUBING TO 'MAKE IT FIT.' IN FACT; I COMMENTED ON 1 OF THOSE PULLS 'I SAW YOUR KNUCKLES TURNING WHITE!' ON STEPS 1.3.31 THROUGH 1.3.38; REQUIRED CLAMPING OF THE NEW LINES (TUBES) WITH REFS TO EXISTING LINES. ON THE L SIDE THERE WAS NO PROB; LINES AND CLAMP WERE INSTALLED EXACTLY LIKE THE ILLUSTRATIONS. HOWEVER; ON THE R -- THERE WAS A PROB; BECAUSE OF THE ROTATION OF THE 'MIXING MUFF' AND THE 'MESSAGING' THAT 'WE' DID ON THE LINES; DID NOT INTERSECT ANY OTHER LINES; AND THE ENGINEERING ORDER DID NOT ILLUSTRATE ANY SPECIAL CONDITIONS FOR THE R. THE ENGINEER; EVEN THOUGH HE CLAIMS HE RECEIVED THIS ENGINEERING ORDER FROM ANOTHER AIR LINE; STILL DOESN'T JUSTIFY US DOING IF WRONG -- HE (ENGINEER) NEVER READ THE ENGINEERING ORDER! HE NEVER STEPPED FOOT IN THE ACFT.