diff --git a/CHANGELOG.md b/CHANGELOG.md
index 80338446..f738032f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,6 +12,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ## Fixes
 
+- TC Scheduler Service 11: Add size and CRC check for contained TC.
 - Only delete health table entry in `HealthHelper` destructor if
   health table was set.
   PR: https://egit.irs.uni-stuttgart.de/fsfw/fsfw/pulls/710/files
diff --git a/src/fsfw/pus/Service11TelecommandScheduling.h b/src/fsfw/pus/Service11TelecommandScheduling.h
index aa958193..83b2b4c0 100644
--- a/src/fsfw/pus/Service11TelecommandScheduling.h
+++ b/src/fsfw/pus/Service11TelecommandScheduling.h
@@ -41,6 +41,8 @@ class Service11TelecommandScheduling final : public PusServiceBase {
   static constexpr ReturnValue_t INVALID_TIME_WINDOW = returnvalue::makeCode(CLASS_ID, 2);
   static constexpr ReturnValue_t TIMESHIFTING_NOT_POSSIBLE = returnvalue::makeCode(CLASS_ID, 3);
   static constexpr ReturnValue_t INVALID_RELATIVE_TIME = returnvalue::makeCode(CLASS_ID, 4);
+  static constexpr ReturnValue_t CONTAINED_TC_TOO_SMALL = returnvalue::makeCode(CLASS_ID, 5);
+  static constexpr ReturnValue_t CONTAINED_TC_CRC_MISSMATCH = returnvalue::makeCode(CLASS_ID, 6);
 
   static constexpr uint8_t SUBSYSTEM_ID = SUBSYSTEM_ID::PUS_SERVICE_11;
 
diff --git a/src/fsfw/pus/Service11TelecommandScheduling.tpp b/src/fsfw/pus/Service11TelecommandScheduling.tpp
index 9016af80..540f6c68 100644
--- a/src/fsfw/pus/Service11TelecommandScheduling.tpp
+++ b/src/fsfw/pus/Service11TelecommandScheduling.tpp
@@ -6,6 +6,8 @@
 #include "fsfw/serialize/SerializeAdapter.h"
 #include "fsfw/serviceinterface.h"
 #include "fsfw/tmtcservices/AcceptsTelecommandsIF.h"
+#include "fsfw/tmtcpacket/pus/tc/PusTcIF.h"
+#include "fsfw/globalfunctions/CRC.h"
 
 static constexpr auto DEF_END = SerializeIF::Endianness::BIG;
 
@@ -171,6 +173,14 @@ inline ReturnValue_t Service11TelecommandScheduling<MAX_NUM_TCS>::doInsertActivi
     return returnvalue::FAILED;
   }
 
+  if (size < PusTcIF::MIN_SIZE) {
+    return CONTAINED_TC_TOO_SMALL;
+  }
+
+  if (CRC::crc16ccitt(data, size) != 0) {
+    return CONTAINED_TC_CRC_MISSMATCH;
+  }
+  
   // store currentPacket and receive the store address
   store_address_t addr{};
   if (tcStore->addData(&addr, data, size) != returnvalue::OK ||