At a glance

Before you start

1. Check firmware and known issues first

• DJI recommends keeping the aircraft and remote controller firmware up to date before each flight. If an update fails, restart the device and retry; contact DJI Support if it persists. [4][2]
• Aircraft, remote controller, payloads and batteries must be on matching firmware. If they aren't, the aircraft cannot take off or there may be risks. [4]
• M300: read DJI's Known Issue List before you replace a part [7]. It dates from March 2023, so also read the current release notes [8].
• M350: DJI publishes release notes, not a known-issue list. Read them before you replace a part [9][10]. Example: firmware v17.02.01.01 (2026-05-28) fixed the aircraft not starting RTH after signal loss while flown through a third-party MSDK Virtual Stick app. [9]
• Mixed fleets (M300 and M350, Smart Controller and RC Plus, TB60 and TB65): follow DJI's Compatible Firmware Update Guide. DJI warns that ignoring its update order can leave a device permanently unusable. See Repair type 5. [5]

2. Safety

• Propeller blades are sharp. Stay clear of rotating propellers and motors. [3][1]
• Keep the aircraft away from people and animals during a firmware update, system calibration or parameter configuration. [3]
• DJI's motor-spin check is done in a safe indoor area with the motors at idle. Stay away from the spinning motors and propellers. [4]

3. Tools and spares DJI lists

Props & arms

1. Step 1

   Unfold and lock the arms

   Unfold the front frame arms, then the rear arms. Lock the frame arms, then unfold the propellers. [3][1]
2. Step 2

   Check the arm sleeves every time

   UK accident investigators looked at two 2021 M300 accidents. In one, the manufacturer found a frame arm had folded back in flight, most likely because its locking collar was not fully tightened. In the other, one arm's locking collar was found loose. Confirm every arm is locked before flight, and act on any arm-lock prompt in the app. [11][12][6][3]
3. Step 3

   Check arm screws and junctions

   The 28 screws on the four frame arms are secure and the arm junctions are not damaged or cracked. Grab each carbon tube and shake the arm slightly: there should be no obvious play. [4][2]
4. Step 4

   Spin each motor by hand

   Feel for blockage or rubbing, and watch the rotor-to-stator gap for rubbing against the motor base. [4][2]
5. Step 5

   Twist-test the motor mount

   Rotate the motor base around the centerline of the carbon tube. The motor-to-tube connection must not be loose, and the four fixing screws must be secure. [4][2]
6. Step 6

   Check the motor upper cover and air filters

   Upper-cover screws are tight and the cover isn't damaged or cracked. If the screws are loose, apply thread locker and tighten them. The air filters are not loose or damaged. [4][2]
7. Step 7

   Inspect and clean the propellers

   Look for deformation, heavy wear, nicks, cracks and foreign material, then clean with a dry soft cloth. Replace damaged blades right away, and replace all blades after 300 flight hours or one year. [4][2]
8. Step 8

   Check the propeller adapters

   If the adapter screws are loose, apply thread locker and tighten them. Replace adapters that are misshapen or damaged. [4][2]
9. Step 9

   Mount props in the right places

   CCW propellers go on motors 1 and 3, CW on motors 2 and 4. Motor 1 is the front-right motor; 2, 3 and 4 follow counter-clockwise. [4][2]
10. Step 10

    Replacing blades

    Use the H2.5 hex key, the provided screws and thread locker (243). Use only official DJI propellers and never mix propeller types. High-altitude props shorten motor life. DJI recommends replacing propellers in the field only in an emergency, then getting the aircraft overhauled. [3][1][4]
11. Step 11

    Landing gear

    Landing-gear base screws secure, with no damage or cracks. To fit the gear, align the red marks, slide the gear lock to the end and rotate it until the red mark lines up with the alignment mark. [4][3]

Gimbal, camera & payload

1. Step 1

   Mount the gimbal correctly

   Press the gimbal detachment button to remove the cover, align the white and red dots, insert the gimbal and rotate the gimbal lock to the locked position. Confirm it is locked. [3]
2. Step 2

   Remove it correctly

   Hold the detachment button down while you rotate the gimbal lock, and turn the lock fully so the next install seats properly. [3]
3. Step 3

   Check the damping plate

   The dampers and the gimbal anti-drop rope are not damaged, and the damping plate has no cracks or splits. Dampers are not loose or aged, and the screws holding the damping plate to the body are secure. [4][2]
4. Step 4

   Check the gimbal connector

   An installed gimbal's connector is secure and cannot be rotated in the opposite direction. [4]
5. Step 5

   Inspect the gimbal and lens

   The gimbal looks intact and rotates smoothly on all three axes, and the lens is clean. [4][2]
6. Step 6

   Radar (if fitted)

   No blockage, no damage to the radar shell, and a secure mounting bracket in good condition. [4]
7. Step 7

   Sensors and lights

   No stickers or obstructions over the infrared-sensing and vision systems or auxiliary lights, especially with a non-DJI payload or accessory. Clean them with a dust-free cloth. [4]
8. Step 8

   After changing payloads

   Recalibrate the center of gravity: hover in a windless place with strong GNSS, then in the app's flight controller settings run Center of Gravity Auto Calibration. The status indicators glow solid purple while it runs. [3][1]

Battery & charging

1. Step 1

   Never mix TB60 and TB65

   Fly and update with a matched pair: two TB60s or two TB65s. A TB65 can be used on an M300 only with M300 firmware v07.00.01.00 or later; otherwise DJI warns of flight-safety risks. A BS60 station must be on v07.00.00.01 before it can charge or update TB65s, and no TB65 may be inserted while you update it. [5]
2. Step 2

   Keep pairs together

   Label each two-battery pair and charge and discharge them together. If the app reports a big difference between the two packs, swap in a pair with similar performance. [3][1]
3. Step 3

   Know when maintenance is due

   TB60 (M300): every 50 cycles, after more than three months idle, or when the app prompts. TB65 (M350): DJI's maintenance manual says every 100 cycles, after more than six months idle, or on an app prompt, while the M350 user manual says every 50 cycles or three months. Following the shorter interval satisfies both. [2][4][3]
4. Step 4

   Run the standard cycle

   Charge to 100% and leave the battery to rest for more than 24 hours. Fly it, land when it is below 20%, and remove it. Rest it for more than six hours, then charge to 100%. [4][2]
5. Step 5

   Check it in DJI Pilot 2

   After a full charge and rest, cell-voltage difference must be under 0.1 V (DJI says rest two hours for the TB65, six hours for the TB60). The pack must not be swollen, leaking or damaged, the terminals must be clean, and the battery firmware current. [4][2]
6. Step 6

   Check the battery compartment

   The three screws on the battery lock and its mounting base are secure. Battery ports are clean, dry and free of corrosion. The eject mechanism under the battery locker works smoothly, and locked batteries don't shake. [4][2]
7. Step 7

   Store it right

   Charge or discharge to 40–60% if a pack will sit for 10 days or more. The BS65 Storage Mode holds packs at 50%. Store packs in a well-ventilated, dry place. [3][1][4]
8. Step 8

   Don't store a TB65 low

   DJI lists the maximum storage time by charge level. For example, 12 days at 0%, 60 days at 10%, 160 days at 30% and 260 days at 50%. DJI says a battery that exceeds its maximum storage period is damaged and should no longer be used. [3]
9. Step 9

   Cold weather

   Hold the battery-level button for four seconds to self-heat a pack out of the aircraft (16–20 °C / 61–68 °F, about 30 minutes). Packs also self-heat in a powered-on aircraft, and a BS65 warms TB65s below 18 °C (64.4 °F). Performance drops noticeably below 5 °C; keep packs above 16 °C (61 °F). Since firmware v03.01.00.14 the M300 will not take off with a battery below 10 °C. [3][1][6]
10. Step 10

    Heat and charging habits

    Start RTH immediately if battery temperature reaches 80 °C (176 °F). Don't charge on or near flammable materials or surfaces; DJI recommends an explosion-proof cabinet for charging and discharging. Don't use packs in a humid environment, and never disassemble or pierce one. [4][2]

Calibration

Compass

1. Step 1

   Pick the spot

   An open area away from magnets, parking structures, construction sites with underground reinforced concrete, and metal such as bridges, cars or scaffolding. Carry no phones or other ferromagnetic items. [3][1]
2. Step 2

   Start

   M350: in the DJI Pilot 2 camera view, open settings, then Sensor Status, Compass, Calibrate Compass. The rear indicators turn solid yellow. M300: tap the aircraft status bar, select Calibrate and follow the prompts. [3][1]
3. Step 3

   Horizontal turn

   Hold the aircraft level and rotate it 360°. The indicators turn solid green. [3][1]
4. Step 4

   Vertical turn

   Hold it vertically, nose down, and rotate 360° around the center axis. [3][1]
5. Step 5

   Read the result

   Blinking red: calibrate again. Red and yellow alternating: strong interference, so move and retry. If the prompt comes back once the aircraft is on the ground, move to another spot and recalibrate. [3][1]

Vision system

1. Step 1

   Connect

   Power on the aircraft and connect it to a PC with a USB-C cable. [3][1]
2. Step 2

   Launch

   Open DJI Assistant 2 (Enterprise Series), log in, click the aircraft model and then the calibration button. [3][1]
3. Step 3

   Calibrate each direction

   M350: follow the on-screen steps, keep reflections off the screen and face the calibration pattern to each of the six vision directions. M300: face the dotted side of the visual calibration plate to the vision system and follow the prompts. Don't power off or unplug until the data calculation finishes. [3][1]

Pass values

• No flight-controller errors after the power-on self-check. [4][2]
• GPS shows four bars within one minute outdoors, and the RTK data meets the heading standard. [4][2]
• Compass interference under 50 after calibration, outdoors. [4][2]
• IMU sensor bias under 0.05 after calibration. [4][2]
• At least 7 satellites in P-mode; IMU and compass data shown in the app; compass heading matches the real heading with a stable needle; vision systems in all directions on with no errors. [4]

Cross-model steps for all DJI Enterprise aircraft: Calibration & firmware.

Firmware & linking

Follow DJI's update order

1. Step 1

   Order

   Remote controller, then aircraft, then DJI payload, then battery station, then batteries. DJI warns that skipping its sequence can leave a device permanently unusable. [5]
2. Step 2

   RC Plus before the station

   The DJI RC Plus must be on v01.02.04.40 or later before it updates a BS65 or BS60. Update the RC Plus first. [5]
3. Step 3

   M300 moving to RC Plus

   The first update must be a DJI Assistant 2 Offline Update of the M300 to v57.00.01.00 (Windows PC, DA2 v2.1.9 or later, battery above 25%, one device at a time). Then link it to the RC Plus in DJI Pilot 2 and clear the aircraft's device data as DJI describes. [5]
4. Step 4

   M300 going back to a Smart Controller

   Once on RC Plus firmware the M300 cannot link to a Smart Controller. To go back, reflash it to v07.00.01.00 with the DA2 Offline Update. [5]

Update with DJI Pilot 2

1. Step 1

   Prep

   Aircraft linked to the remote controller, both above 25% battery, and the controller online for the whole update. [3]
2. Step 2

   Update All

   Tap the firmware prompt on the Pilot 2 home screen, then Update All. It takes about 15 minutes. Installed TB65s, the CSM Radar and the gimbal camera update too, and both devices restart automatically. [3]
3. Step 3

   Battery station and spare packs

   Insert up to eight packs, power on the station and connect its USB-C maintenance port to the controller. Tap Update All on the station update page (about 10 minutes). Do not insert or remove batteries or unplug the cable during the update, and don't charge with the station while it updates. [3][1]
4. Step 4

   Offline option

   Download the offline package from DJI to a microSD card or USB drive. In Pilot 2 tap HMS, Firmware Update, Offline Update, choose the package and tap Update All. [3]
5. Step 5

   PC option

   DJI Assistant 2 (Enterprise Series) updates the aircraft and remote controller one at a time. It does not update the BS65 or the H20N, L1, L2 or P1; use an SD card or Pilot 2 for those. A limp gimbal, blinking lights and reboots are normal during the update, and you may need to re-link afterward. [3][9]
6. Step 6

   If it fails

   Restart the devices and try again. If it still fails, contact DJI Support. [4][2]

Re-link the remote controller

1. Step 1

   Start linking

   Power on both. Press C1 + C2 + Record together until the status LED blinks blue and the controller beeps twice. With an RC Plus you can also start linking from DJI Pilot 2. [3][1]
2. Step 2

   Aircraft side

   M350: hold the aircraft power button for at least five seconds. M300 with a Smart Controller: press the aircraft's linking button, with the controller within 0.5 m (1.6 ft). [3][1]
3. Step 3

   Confirm

   The aircraft status indicators blink green and the controller status LED turns solid green. [3][1]

Cross-model steps for all DJI Enterprise aircraft: Calibration & firmware.

Crash triage

After a hard landing, crash or emergency landing

1. Step 1

   Make the batteries safe

   Power off and remove the packs. A pack with visible shell damage goes into a 5% salt solution right away and is never used again. [4][2]
2. Step 2

   Inspect the structure

   Look at and feel the propellers, frame arms, arm junctions and landing gear. Replace a cracked or damaged part before flying; arm and motor faults are factory work (Repair type 1). [4][2]
3. Step 3

   Check the arms and motors

   Run the arm-sleeve, arm-shake, motor-spin and motor-mount checks from Repair type 1. [4][11]
4. Step 4

   Check the gimbal and sensors

   Damping plate, anti-drop rope, gimbal rotation, and the vision and infrared lenses (Repair type 2). [4]
5. Step 5

   Read HMS

   Open HMS in DJI Pilot 2. Green is normal, orange is caution, red is warning. Tap a warning for DJI's help document, and check Error Records for frequent or critical errors. [3][4]
6. Step 6

   Upload logs

   In HMS, Manage Logs, upload the aircraft and controller logs to DJI Support (connect the battery station by USB-C to include its logs). Flight data can also be exported from the aircraft with DJI Assistant 2 or DJI Pilot 2. [3]
7. Step 7

   Request service

   Use DJI's online service request. [4][14]

Three-propeller emergency landing (M300)

• If the aircraft loses one motor's lift it can enter Three-propeller Emergency Landing: it spins and descends while you steer it to a safe area. DJI says to contact DJI support for propulsion-system maintenance as soon as possible after landing. [1]
• In one UK accident this mode was triggered when a frame arm folded back in flight and struck the motor. [11]

General crash steps for any drone: Crash triage.

Water exposure

1. Step 1

   Know your rating

   M300: IP45 with TB60s fitted. It is not rated with the arms folded, so don't fold the arms in the rain. M350: IP55 with TB65s fitted, including with the arms folded. Neither rating is permanent; both can drop over time. [1][3]
2. Step 2

   When the rating is lost

   Non-DJI or wrong-model batteries, port covers not attached correctly, a loose top-shell waterproof plug, or a broken shell or failed waterproof adhesive. [3][1]
3. Step 3

   Rain limits

   Do not fly when rainfall exceeds 100 mm in 24 hours. The RC Plus should not be used above 50 mm in 24 hours, and its covers, control sticks and antennas should not be opened or changed in the rain. [3][1]
4. Step 4

   Dry before you swap, charge or case it

   Battery ports, compartment ports and battery surfaces must be dry before you insert a pack, and free of liquid before you charge it. Wipe the aircraft dry before packing it in its case. [3][1]
5. Step 5

   Check the seals

   The rubber port covers must be in place, undamaged and not loose. If they aren't, water may enter the body and cause a short circuit. [4][2]
6. Step 6

   Controller ports

   Water stains around an RC Plus port after you open its cover are normal. Wipe them off before you use the port. [3]

Scheduled maintenance

Owner-level checks between services

1. Step 1

   Body and screws

   Clean the body with a soft cloth, especially the vision and infrared lenses and the heat-dissipation vents. All body screws tight, especially the motor-to-carbon-tube screws. [4][2]
2. Step 2

   Data ports

   Wipe around the ports with gauze. Disconnect any cable and look inside with a light. Pick out debris with tweezers, wipe sticky residue with gauze, then turn the port downward and sweep powder out from the inside with gauze or a brush. [4][2]
3. Step 3

   Vents and fans

   No blockage in the heat-dissipation vents or the upper fan intake. Powered on, the top and bottom cooling fans run without noise. [4]
4. Step 4

   Lights and beacons

   Vision-system lenses, auxiliary lights and beacons are not loose or cracked; frame-arm LEDs have no damage or foreign objects. [4][2]
5. Step 5

   Remote controller

   Sticks center in neutral and move through their full range with no sand or soil; the screen is clean and dry; antennas are tight and undamaged. [4]
6. Step 6

   Track it

   HMS includes the DJI Maintenance Program, which shows historical flight data so you can check against the maintenance manual. Log each service in the record table at the back of DJI's maintenance manual: date, total flight hours, items done and signature. [3][4]

Test-flight & QC checklist

DJI publishes a powered-on checklist and a flight-test checklist for both aircraft. The items below follow them. Fly under your agency's SOP, within visual line of sight. [16]