Maintenance

The X55 is designed to be modular and low maintenance. It is strongly recommended to follow the table below to regularly inspect the X55 to avoid potential failure. Contact [e-mail] if you have any questions.

Determining Accrued Flight Time

To determine the flight hours, look up STAT_FLTTIME in the parameters using Mission Planner or QGC. This is the total flight time in seconds. To get hours, simply divide by 3600. With Arcsky ArduPilot firmware version 4.3.7 and later, you will see flight hours displayed on the messages tab of QGC and Mission Planner about 1 minute after boot-up.

Every 15 hours

Item	Action	Description
Arm fasteners	Inspect fastener tightness.
Motor fasteners	Inspect fastener tightness.
Propeller fasteners	Inspect fastener tightness.
Arm shoulder bolt	Inspect fastener tightness.
Arm set	With the arm in the locked position, check to make sure there’s no excess movement/play by trying to rotate the arm in both directions, using the propellers as leverage. (applying wiggling force on the propeller)
Propeller blades	Check the propeller blades for damage, nicks, scrapes

Every 100 hours/ 3 months

Item	Action	Description
Motor	For any sign of damage, grinding sound
Motor fasteners	Inspect fastener tightness.
X55 flight batteries	Battery Charge Cycle For long-term storage, charge/ discharge the battery to storage level.
X55 Main Power Connector (AS120)	Inspect the Main Power Connector (AS120) If the connector starts to feel loose or makes a sparking sound, replace the connector.	AS120 plug
Battery Module Main Power Connector (AS120)	Inspect the Battery Module AS120 Connector If the connector starts to feel loose or makes a sparking sound, replace the connector.	AS120 plug
Battery Module XT90 Connectors	Inspect Battery Module XT90 Connector If the connector starts to feel loose or makes a sparking sound, replace the connector.	XT90 plug
Main Power Cable	Inspect the Main Power Connector (AS120) If the connector starts to feel loose or makes a sparking sound, replace the connector.

Every 600 hours

Item	Action	Description
Motor	Check for any sign of damage, or grinding sounds. Replace if necessary
Arcsky Full Service	We recommend sending the X55 back to us for a full inspection and system test. Contact [e-mail] for more information

General Torque Specification

The table below shows the general torque specifications for all the fasteners. Unless otherwise noted, please follow the torque specifications stated below.

Into Aluminum

Fastener (Metric)	N-m	in-lbs
M3	1	8.9
M4	2.6	23
M5	5.1	45
M6	8.7	77
M8	21.2	188