diff --git a/MuonSpectrometer/MuonCnv/MuonEventAthenaPool/MuonEventAthenaPool/CscRawData_p0.h b/MuonSpectrometer/MuonCnv/MuonEventAthenaPool/MuonEventAthenaPool/CscRawData_p0.h
index 5293637ba541d1ff2dce0cdc889e76b56eb5d724..30bce6fb8cc7ee438601f0ccba319c6f0ed8d8a8 100644
--- a/MuonSpectrometer/MuonCnv/MuonEventAthenaPool/MuonEventAthenaPool/CscRawData_p0.h
+++ b/MuonSpectrometer/MuonCnv/MuonEventAthenaPool/MuonEventAthenaPool/CscRawData_p0.h
@@ -1,5 +1,5 @@
 /*
-  Copyright (C) 2002-2017 CERN for the benefit of the ATLAS collaboration
+  Copyright (C) 2002-2024 CERN for the benefit of the ATLAS collaboration
 */
 
 #ifndef MUON_CSCRAWDATA_P0_H
@@ -25,7 +25,7 @@ class CscRawData_p0
   void setDpuID (uint16_t dpuID) { m_dpuID = dpuID; }
   uint16_t dpuID() const { return m_dpuID; }
   uint16_t identify() const {return m_id;} 
-  const std::vector<uint16_t>  getSamples() const { return m_amps; }
+  const std::vector<uint16_t>  & getSamples() const { return m_amps; }
   uint32_t getAddress() const { return m_address; }
 
   // to be removed eventually
@@ -36,15 +36,15 @@ private:
 
   //!!!!!!!!!!!!!!!   Order of data fields sorted alphabethically for compatibility with ROOT 3 and 4 (Reflection dictionary)
 
-  uint32_t m_address; 
+  uint32_t m_address{}; 
 
   // this data member is
   // only here for backward compatibility with ROOT3
-  uint16_t m_amplitude[4];
+  uint16_t m_amplitude[4]{};
 
   std::vector<uint16_t> m_amps;
-  uint16_t m_dpuID;
-  uint16_t m_id;
+  uint16_t m_dpuID{};
+  uint16_t m_id{};
   
 };
 
diff --git a/MuonSpectrometer/MuonCnv/MuonEventAthenaPool/MuonEventAthenaPool/RpcSectorLogicContainer_p1.h b/MuonSpectrometer/MuonCnv/MuonEventAthenaPool/MuonEventAthenaPool/RpcSectorLogicContainer_p1.h
index ab4627292bbb7b1e021d80498293e1f7e51ac65c..04ee0495d8381f526e2db51eb4d8173fca5cb93c 100644
--- a/MuonSpectrometer/MuonCnv/MuonEventAthenaPool/MuonEventAthenaPool/RpcSectorLogicContainer_p1.h
+++ b/MuonSpectrometer/MuonCnv/MuonEventAthenaPool/MuonEventAthenaPool/RpcSectorLogicContainer_p1.h
@@ -1,5 +1,5 @@
 /*
-  Copyright (C) 2002-2017 CERN for the benefit of the ATLAS collaboration
+  Copyright (C) 2002-2024 CERN for the benefit of the ATLAS collaboration
 */
 
 // RpcSectorLogicContainer_p1.h
@@ -20,7 +20,7 @@ class RpcSectorLogicContainer_p1  {
 public:  
     RpcSectorLogicContainer_p1() {}; 
     
-    uint32_t m_sectorList[2]; //!< From RpcSectorLogicContainer. Dataword to contain the list of already filled sectors.
+    uint32_t m_sectorList[2]{}; //!< From RpcSectorLogicContainer. Dataword to contain the list of already filled sectors.
       
    /**This contains the bulk of the information from the various SL objects.
    
diff --git a/MuonSpectrometer/MuonCnv/MuonEventAthenaPool/MuonEventAthenaPool/TgcL1Rdo_p1.h b/MuonSpectrometer/MuonCnv/MuonEventAthenaPool/MuonEventAthenaPool/TgcL1Rdo_p1.h
index 0eeb88f2cb4f54df05f00c586525088252955104..1bede431cceb3e9a68c966e6fd44642bd7034a4e 100644
--- a/MuonSpectrometer/MuonCnv/MuonEventAthenaPool/MuonEventAthenaPool/TgcL1Rdo_p1.h
+++ b/MuonSpectrometer/MuonCnv/MuonEventAthenaPool/MuonEventAthenaPool/TgcL1Rdo_p1.h
@@ -1,5 +1,5 @@
 /*
-  Copyright (C) 2002-2021 CERN for the benefit of the ATLAS collaboration
+  Copyright (C) 2002-2024 CERN for the benefit of the ATLAS collaboration
 */
 
 #ifndef MUON_TGCL1RDO_P1_H
@@ -21,7 +21,7 @@ public:
 
 private:
 
-    uint16_t m_version;
+    uint16_t m_version{};
 
     // ID of this instance
     uint16_t m_id{0};