diff --git a/src_stripped/KSP/Sim/Definitions/PartBehaviourModule.cs b/src_stripped/KSP/Sim/Definitions/PartBehaviourModule.cs
index 4a9af6dc9..b77fa54bf 100644
--- a/src_stripped/KSP/Sim/Definitions/PartBehaviourModule.cs
+++ b/src_stripped/KSP/Sim/Definitions/PartBehaviourModule.cs
@@ -152,6 +152,9 @@ public IObjectAssemblyPart OABPart
     [MethodImpl(MethodImplOptions.NoInlining)]
     protected virtual void OnStart() => throw null;
 
+    /// <summary>
+    /// It appears this doesn't trigger at all?
+    /// </summary>>
     [MethodImpl(MethodImplOptions.NoInlining)]
     protected virtual void OnShutdown() => throw null;
 
@@ -198,21 +201,42 @@ int IPriorityOverride.ExecutionPriorityOverride
       [MethodImpl(MethodImplOptions.NoInlining)] get => throw null;
     }
 
+    /// <summary>
+    /// It appears this doesn't trigger at all?
+    /// </summary>
     [MethodImpl(MethodImplOptions.NoInlining)]
     public void OnFixedUpdate(float deltaTime) => throw null;
 
+    /// <summary>
+    /// This starts triggering when the Flight scene is loaded and then keeps triggering 
+    /// </summary>
     [MethodImpl(MethodImplOptions.NoInlining)]
     protected virtual void OnModuleFixedUpdate(float fixedDeltaTime) => throw null;
 
+    /// <summary>
+    /// This starts triggering as soon as the part is first placed in the OAB scene.
+    /// Does not trigger anymore when scene transitions fo Flight. 
+    /// </summary>
     [MethodImpl(MethodImplOptions.NoInlining)]
     protected virtual void OnModuleOABFixedUpdate(float fixedDeltaTime) => throw null;
 
+    /// <summary>
+    /// This starts triggering as soon as the part is first placed in the OAB scene.
+    /// Keeps triggering in every scene after this.
+    /// OnUpdate is called every frame. 
+    /// </summary>
     [MethodImpl(MethodImplOptions.NoInlining)]
     public virtual void OnUpdate(float deltaTime) => throw null;
 
+    /// <summary>
+    /// It appears this doesn't trigger at all?
+    /// </summary>
     [MethodImpl(MethodImplOptions.NoInlining)]
     protected virtual void OnModuleUpdate(float deltaTime) => throw null;
 
+    /// <summary>
+    /// It appears this doesn't trigger at all?
+    /// </summary>
     [MethodImpl(MethodImplOptions.NoInlining)]
     protected virtual void OnModuleOABUpdate(float deltaTime) => throw null;
 
diff --git a/src_stripped/KSP/Sim/impl/PartComponentModule.cs b/src_stripped/KSP/Sim/impl/PartComponentModule.cs
index 3f9a79031..e55e6ad46 100644
--- a/src_stripped/KSP/Sim/impl/PartComponentModule.cs
+++ b/src_stripped/KSP/Sim/impl/PartComponentModule.cs
@@ -58,15 +58,31 @@ protected ResourceFlowRequestBroker resourceFlowRequestBroker
     [MethodImpl(MethodImplOptions.NoInlining)]
     public virtual void ThermalUpdate(double deltaTime) => throw null;
 
+    /// <summary>
+    /// This triggers when the Flight scene is first loaded. When loading a game it triggers for in-flight vessels also.
+    /// </summary>
     [MethodImpl(MethodImplOptions.NoInlining)]
     public virtual void OnStart(double universalTime) => throw null;
 
+    /// <summary>
+    /// This starts triggering when vessel is first placed in Flight. Does not trigger while still in OAB.
+    /// Keeps triggering in every scene once it's in Flight.
+    /// OnUpdate is called every frame.
     [MethodImpl(MethodImplOptions.NoInlining)]
     public virtual void OnUpdate(double universalTime, double deltaUniversalTime) => throw null;
 
+    /// <summary>
+    /// This triggers when the part is destroyed, when leaving the Flight scene, when exiting the game.
+    /// It... also triggers when Flight scene is loaded? (why? maybe it's triggered when leaving the OAB scene)
+    /// </summary>
+    /// <returns></returns>
+    /// <exception cref="Exception"></exception>
     [MethodImpl(MethodImplOptions.NoInlining)]
     public virtual void OnShutdown() => throw null;
 
+    /// <summary>
+    /// It appears this doesn't trigger at all?
+    /// </summary>
     [MethodImpl(MethodImplOptions.NoInlining)]
     public virtual void OnFinalizeCreation(double universalTime) => throw null;