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
Check fluid level each use
Lubricate casters every three months
Clean annually or as needed
AIRCRAFT JACK PROOF LOAD TESTING GUIDE
The ultimate guide to understanding aircraft jack proof load testing. Read it here.
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e2b calibration is an ISO/IEC 17025 ACCREDITED calibration and repair laboratory providing a full scope of NIST TRACEABLE calibration, test, and measurement services for AEROSPACE equipment. Services are provided in a climate-controlled, state-of-the-art laboratory with ON-SITE SERVICES, and local pick-up and delivery available on request. A cloud-based document and ASSET MANAGEMENT PORTAL provides customers with instant access to certificates of calibration, asset information, and reports.