Aircraft Jack Calibration Checklist

Aircraft Jack Calibration Checklist

There are many factors to consider when it comes to calibrating your aircraft jacks. For your convenience, we have compiled a checklist containing all of the necessary steps. Your calibration lab should be following these steps to ensure your aircraft jacks are being properly maintained.

  • Maintenance and repair work should be completed using safe practices and proper tools
  • Work area should be free of all debris
  • When O-rings and backup rings are removed, avoid making contact with critical surfaces other parts. Surface deformities could cause degradation of seals
  • Replace both O-rings and backup rings once removed. Damaged O-rings result in fluid leakage
  • Cylinder bore can be honed to a max diameter of 2.629 inches and a surface finish of 16 micro inches. If pitting bore cannot be removed, the jack cylinder must be replaced
  • Flush old hydraulic fluid from system and replenish with new hydraulic fluid
  • When refilling hydraulic system, characteristics of the fluid used in the jack and the level of fluid should be noted
  • Jack should be maintained and repaired in accordance with the manufacturer’s instructions
  • No modifications shall be carried out that adversely affect the compliance of the jack with draft standard 2006/42/EC
  • If jack is disassembled, the unit should be proof load tested to insure relief vale is set correctly to ensure the jack does not overload itself
Maintenance Schedule:
  • Check fluid level each use
  • Lubricate casters every three months
  • Clean annually or as needed


The ultimate guide to understanding aircraft jack proof load testing.
Read it here.


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