When calibrating an aircraft stabilizer stand, it’s important to ensure a handful of factors are in order. To ensure all steps are completed, we have created a brief aircraft stabilizer stand calibration checklist to assist you with the process. The calibration lab that you entrust your aircraft stabilizer stands to should be checking off each of these boxes in their routine calibration plan.
Good workmanship practices and proper tools are being used when performing maintenance/repair Work area is clean and dirt free Contact is avoided when O-rings and backup rings are removed (surface deformities could cause degradation of the seals, along with failure) O-rings and backup rings are replaced once they are removed (cut and damaged O-rings result in fluid leakage) Cylinder bore is refined to a maximum diameter of 4.506 inches and a surface finish of 16 micro inches if found rusty ****Notably, if pitting the bore cannot be removed, the tailstand cylinder must be replaced before returned to service. Old hydraulic fluid is flushed and system is replenished with new hydraulic fluid.
Even after an aircraft stabilizer stand has been calibrated, it is still essential to ensure that 90-day routine maintenance is performed. This will guarantee that your aircraft stabilizer stand is in tip-top shape. Every 90 days, a tailstand should be full extended and retracted to exercise the seals and to prevent rust on the cylinder inside diameter. This is especially important if a tailstand is not being used on a regular basis. During maintenance, it is also important to extend the ram, clean the threads and spray with DoALL RPM, LPS or equivalent.