As the others have said, there is no need to change the props out very often. I've even read that you only need to change them if they are broken or have nicks in them.
That being said, here is the maintenance schedule suggested by Airdata:
Basic - Every 20 flights or 200 minutes
1. Look for cracks in the outer shell, specifically around the motors which are more prone to cracks 2. Check visually that all screws are in place and are tight 3. Inspect the propellers and look for broken pieces, bent blades or other damage
Extended - Every 100 flights or 1000 minutes
1. Perform IMU calibration. IMU calibration works best on a completely flat surface. After you’ve connected the remote controller with the mobile device, go to Settings – Sensors – Check IMU – IMU Calibration.
Tip: Perform this calibration when the aircraft has cooled down to room temperature. This will assist later with the startup time of the aircraft. 2. Perform Compass calibration 3. Perform Gimbal calibration
It is strongly recommended to also perform the Basic drone service as part of this service.
Full - Every 200 flights or 2000 minutes
Carefully inspect all systems of the aircraft:
Exterior Shell: 1. Check that all screws are in place and make sure there are no loose screws. Use a flashlight and a small screwdriver to help with this. 2. Inspect all the stickers on the aircraft and make sure there are no loose stickers. Loose stickers may fall midflight and obstruct the motors. 3. If your country regulations require, verify that the aircraft registration label shows up properly on the aircraft 4. With propellers on, rotate each propeller with your finger and make sure all move freely 5. Remove propellers, turn on aircraft and start the motors. Check if motors are rotating without unusual vibration and that the motor shafts rotate straight without any wobble. Sensors and Vents: 1. Verify all vents are clean and open 2. Verify that the Sonar sensors and Proximity sensors (if equipped) are clean Gimbal: 1. Check gimbal vibration absorbers - make sure they are not cracked or stiff and that they are inside their housing 2. Check the gimbal pins that are securing the vibration absorbers - make sure at least 2 are installed 3. Inspect gimbal lens for damage 4. Inspect gimbal arm and wires for damage Battery Contacts: 1. Remove the battery from the aircraft 2. Check all gold battery plates inside the aircraft. If there are any stains on the surface, you can use a Q-tip dipped in pure (anhydrous) isopropyl alcohol (alcohol containing no more than 1% water) or electrical contact cleaner (typically comes in a spray can) to clean them to ensure good contact. 3. Check to see if the metal contacts of the battery power and data sockets are damaged. If the surface severely burnt, use a piece of a fine sandpaper (Grit 150 or higher) to carefully clean the surface.
It is strongly recommended to also perform the Basic and Extended drone services as part of this service.
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