diff --git a/ArduPlane/ReleaseNotes.txt b/ArduPlane/ReleaseNotes.txt
index 43b3da9b96..7ff6b92836 100644
--- a/ArduPlane/ReleaseNotes.txt
+++ b/ArduPlane/ReleaseNotes.txt
@@ -1,3 +1,34 @@
+Release 5.2.0 11th March 2024
+------------------------------
+ - Added a prearm check for a crash dump file. If one is found, arming will be blocked by the prearm.
+ - Added prearm checks for cx_built_in_test script not running, incorrect parameters, incorrect aircraft type, and ESC telemetry failure.
+ - Add new messages for pilot awareness
+    - "Script Version x.y Initialized"  - On bootup of cx_built_in_test script .
+    - "Parameter Init Failed"           - Fail to Initialized Parameter in script.
+    - "Aircraft Type Check Failed"      - Fail to Check Aircraft Type in script.
+    - "ESC x RPM nil"                   - Script did not receive RPM data.
+    - "ESC x Servo Out nil"             - Script did not receive Servo data.
+    - "ESC x Telemetry Lost/Recovered"  - Fail/Recover on Lost of ESC telemetry.
+    - "ESC x RPM Drop/Recovered"        - Drop/Recover on Lost of RPM during Demand.
+    - "Actuator x Telemetry Error"      - Before Arming ESC Telemetry not present.
+ - Default configurations build into Cube and CPN for easier drone setup and reduced configuration steps.
+ - FW version name format change "CxPilot x.y.x" to "CxPilot-x.y.z". 
+ - dded "ESCX" extended telemetry log message for logging ErrorStatus, InputPct and OutputPct from ESC.
+ - All build files will be uploaded to AWS S3 bucket "carbonix-firmware-release-files" and "carbonix-firmware-dev-files" with folder format yyyymmdd_hhmm_CxPilot-x.y.z_commitId
+
+Technical:
+ - AP_Periph: fix missing custom firmware version #147 [SW-159](https://carbonix.atlassian.net/browse/SW-159) 
+ - cx_built_in_test: debounce audible warning for nil #146 [SW-219](https://carbonix.atlassian.net/browse/SW-219)
+ - APD F120 packet modification #138 [SW-187](https://carbonix.atlassian.net/browse/SW-187)
+ - workflow: Carbonix_build to push data to AWS S3 bucket #143 [SW-199](https://carbonix.atlassian.net/browse/SW-199)  
+ - AP_Scripting: fixed float register save/restore in setjmp/longjmp #134 [SW-193](https://carbonix.atlassian.net/browse/SW-193)
+ - workflow change buildfile name to firmware name #132 [SW-191](https://carbonix.atlassian.net/browse/SW-191)
+ - hwdef: CarbonixCubeOrange - added cx_built_in_test.lua #122 [SW-61](https://carbonix.atlassian.net/browse/SW-61)
+ - Fix servo assignments #128 [SW-181](https://carbonix.atlassian.net/browse/SW-181)
+ - workflows: added on branches CxPilot-* #130 [SW-130](https://carbonix.atlassian.net/browse/SW-130)
+ - PARAMS : BATT*_MONITOR corrected in defaults.parm #126 [SW-158](https://carbonix.atlassian.net/browse/SW-158)
+ - AP_Arming: force user to ack crashdump or get prearm failure #125 [SW-148](https://carbonix.atlassian.net/browse/SW-148)
+
 Release 5.1.1 20th March 2024
 ------------------------------
 - AP_ICEngine: Added a new parameter CRANK_DIR for controlling the direction of engine cranking, providing flexibility in engine configurations.
diff --git a/libraries/AP_Common/CxVersion.h b/libraries/AP_Common/CxVersion.h
index 2c9c3c899c..e022e28818 100644
--- a/libraries/AP_Common/CxVersion.h
+++ b/libraries/AP_Common/CxVersion.h
@@ -1,5 +1,5 @@
 #ifdef CARBOPILOT
 #ifndef AP_CUSTOM_FIRMWARE_STRING
-#define AP_CUSTOM_FIRMWARE_STRING "CxPilot-5.1.1"
+#define AP_CUSTOM_FIRMWARE_STRING "CxPilot-5.2.0-beta1"
 #endif
 #endif