A Mechanic questions a recent Boeing standard wiring practices manual (SWPM) revision; limiting the maximum number of post production wiring splices to three on a wire for all B737's. His carrier does not have a system to track the number of splices installed on any given wire run.

Narrative

This is my third report on this item. I keep getting told that the resolution will be that the verbiage is going to be removed (which it was at one point several years ago) from the standard wiring practices manual (SPWM); but as of the latest SWPM revision 42; June 2009; not only has it returned; but they even added a picture. Boeing Standard Wiring Practices Manual; Chapter 20; Document D6-54446; Subject 20-10-13: Repair of Electrical Wire; Page 4 states that the maximum number of splices allowable per wire is three. We do not have a mechanism here at my air carrier to track the number of splices installed on a wire. Several years ago I filed a report on this very subject and the result was the verbiage on the maximum number being removed from the SWPM. But I see now that it has returned. The June 2009 revision 42 version of the SWPM 20-10-13; page 4; not only has the same three splice limit language; but it also has a picture! How we can possibly be held accountable to this requirement when we do not have a system in place to track the number of post production splices installed?