Tools needed for the pylon hydraulic line jamnut modification. 737-6/7/8/900
Spanners: 1-5/16 inch
1-3/8 inch
1-1/2 inch
1-5/8 inch
2-1/8 inch
Tip: The whole aft side of the pylon fairing can be removed, see this tip on this site. This makes the area very accessible for this modification and other work to be done there. (for example the Rubstrip modification)