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.