Way more problems with the hydraulic lines. Those production swages let go all the time.
Replace every failed swage fitting with a Rynglok fitting and it will survive the rest of the aircraft. What an amazing and easy to use system.
It's fantastic as a torturing tool - going into the stabilizer compartment with a running APU, the LD4 fume will cause an all round burning sensation not only to your skin but eyes and lungs as well... oh and mouth when you need to shout into the walkie talkie...
The stabilizer compartment has its cozy spots... but with the APU running, I can recommend the aft accessory compartment. Of all things I've ever done on the aircraft, the most scary thing was standing just inches between the #2 bleed duct and the APU surge bleed duct with the APU at full blast during a leak check of the aft fuel fire shut off valve with the EGN #2 wet motoring, anticipating a rupture of either of the two bleed ducts at any time. It's hot, extremely loud, and just terrifying