M300 Annual Preventative Maintenance
Annual maintenance boosts flight safety and reliability by catching wear in motors/props, sensors, and batteries early—reducing inflight faults, fly-aways, and unplanned downtime. It keeps calibrations and firmware current for peak performance (RTK/vision/cooling), extends component life, protects warranty/compliance, and lowers total cost of ownership.
Bayer - Fleet: M300 UAV PM
10/23/2025
M300 Annual Preventative Maintenance
Annual maintenance boosts flight safety and reliability by catching wear in motors/props, sensors, and batteries early—reducing inflight faults, fly-aways, and unplanned downtime. It keeps calibrations and firmware current for peak performance (RTK/vision/cooling), extends component life, protects warranty/compliance, and lowers total cost of ownership.
General UAV Information
UAV FAA Registration Number
Is the FAA Registration Card Present
UAV Serial Number (on frame of UAV)
Remote Control Serial Number (in controller settings)
Sensor type and Serial Number
Main Body of UAV
Looking over the main body of the UAV inspect for crack or other damage. Check to ensure all screws are secure on main body.
Visually inspect for damage then run hand along surface to feel for any damage. Use a tool to check for the screw tightness
if the answer is "oneOf [FLAG,FAIL]"
Explain Issue
Frame arms: check all the screws are secure and that the arm junctions are not damaged or cracked
Visually look over the arms and junctions, check screw tension with tool, feel along the arm and the arm junction for in cracking not visibly seen
if the answer is "oneOf [FLAG,FAIL]"
Explain Issue
The waterproof rubber port covers are in place. If not, water may enter the aircraft body which will cause a short circuit
These are the covers that are protecting ports around the outside of the UAV main body. See Picture for ones on top and there are ports on the bottom as well.
if the answer is "oneOf [FLAG,FAIL]"
Explain Issue
Landing Gear screws are secure and there is no damage or cracks to the mount on the UAV or the legs.
visually inspect and run hand along landing gear to feel for damage. Check the screw tightness with tool
if the answer is "oneOf [FLAG,FAIL]"
Explain Issue
There is no blockage in the intake vent of the upper and lower cooling fan and the fans are blown out with canned air or equivalent mechanism
Vitally important to blow canned air into upper fan to prevent from getting dirty and damaged during season. Would recommend doing throughout year.
if the answer is "oneOf [FLAG,FAIL]"
Explain Issue
The propellers are not visibly deformed, damaged, aged or softened (run hands down the propellers to fill or damage, cracks or nicks.) If they are, replace the propellers immediately. If there are any foreign objects on the propellers, clear them before use.
If you change the props please let Ann Keller know or if you need props please reach out to Agfast or Ann Keller
if the answer is "oneOf [FLAG,FAIL]"
Explain Issue
Be sure all infrared sensing, vision sensing, and auxiliary lights do not have anything blocking them (labels or stickers) and are cleaned
Lens/sensors on main body can be cleaned with a soft clean cloth
if the answer is "oneOf [FLAG,FAIL]"
Explain Issue
Motors
Manually rotate the motors to check if they are firmly installed without a gap between the motors and the motor base and the motors rotate smoothly without noise or grinding feeling
Check all 4 motors
if the answer is "oneOf [FLAG,FAIL]"
Explain Issue
Propellers are mounted correctly. CCW propellers should be on motors 1 and 3, and CW propellers should be on motors 2 and 4
The front-facing propeller on the right is motor 1, with motor 2, 3 and 4 arranged in a counterclockwise order
if the answer is "oneOf [FLAG,FAIL]"
Explain Issue
Check the LED lights on the motors to be sure they are free of debris and not cracked.
Wipe away any debris with cloth
if the answer is "oneOf [FLAG,FAIL]"
Explain Issue
Batteries
There is no debris in the battery ports on the UAVS and the ports are not misshapen
if the answer is "oneOf [FAIL,FLAG]"
Explain Issue
The battery lock clip can be smoothly turned to unlock batteries and when locked doesn't have slack and hold battery in position
Put battery into UAV to check the locking clip and also check that the 3 screws are tightly screwed in.
if the answer is "oneOf [FLAG,FAIL]"
Explain Issues
Are the UAV batteries in good shape? no cracks or bulging of the battery casing.
if the answer is "oneOf [FLAG,FAIL]"
Explain Issue
Charge M300 Batteries fully monthly
Please just charge up your batteries monthly to ensure they do not get so low in storage that they will not take a charge come flying season.
Gimbal and Sensor
Gimbal Damping Plate (mounting system): The mount is securely screwed onto the body of the UAV and the rubber dampeners are not damaged, loose or aged
Check the screws for tightness then look at the rubber dampeners and be sure they are still flexible and not cracking due to damage or age. Also be sure that they are secure by just touching them and ensuring they are not about to fall out.
if the answer is "oneOf [FLAG,FAIL]"
Explain Issue
Sensor: Check all lenses for any damage or cracks. Ensure the lenses are free of debris.
Visually inspect sensor and lenses. If the lenses need cleaned please use a soft lens cleaner cloth to gently wipe them clean
if the answer is "oneOf [FLAG,FAIL]"
Explain Issue
All Cables that go from UAV to Sensor are in visually good shape as is the Light meter on top of the UAV
if the answer is "oneOf [FLAG,FAIL]"
Explain Issue
Remote Control
Is the screen and frame of the remote control in good condition
Visually inspect for any damage
if the answer is "oneOf [FLAG]"
Explain Issue
Do the control stick move smoothly with out grinding or feeling of debris?
Manually manipulate the sticks to check that they move freely
if the answer is "oneOf [FLAG,FAIL]"
Explain Issues
Antennas have no damage and can freely be extended
if the answer is "oneOf [FLAG,FAIL]"
Explain Issue
Ports on the back of the remote control are in good working order
visually do they look ok. Also, were they working fine at the end of the season. The iPad cable plugged in and keep a connection.
if the answer is "oneOf [FLAG,FAIL]"
Explain Issue
Wrap Up
Are there any other concerns you have about this UAV?
How easy was it to complete this maintenance procedure?
Please put your name in the box confirming you conducted the PM
How long did it take to complete the PM
Source: Bayer - Fleet: M300 UAV PM (Community Member)