diff --git a/extensions/openpower-pels/failing_mtms.hpp b/extensions/openpower-pels/failing_mtms.hpp
new file mode 100644
index 0000000..209eaa9
--- /dev/null
+++ b/extensions/openpower-pels/failing_mtms.hpp
@@ -0,0 +1,102 @@
+#pragma once
+
+#include "data_interface.hpp"
+#include "mtms.hpp"
+#include "section.hpp"
+#include "stream.hpp"
+
+namespace openpower
+{
+namespace pels
+{
+
+/**
+ * @class FailingMTMS
+ *
+ * This represents the Failing Enclosure MTMS section in a PEL.
+ * It is a required section.  In the BMC case, the enclosure is
+ * the system enclosure.
+ */
+class FailingMTMS : public Section
+{
+  public:
+    FailingMTMS() = delete;
+    ~FailingMTMS() = default;
+    FailingMTMS(const FailingMTMS&) = default;
+    FailingMTMS& operator=(const FailingMTMS&) = default;
+    FailingMTMS(FailingMTMS&&) = default;
+    FailingMTMS& operator=(FailingMTMS&&) = default;
+
+    /**
+     * @brief Constructor
+     *
+     * @param[in] dataIface - The object to use to obtain
+     *                        the MTM and SN.
+     */
+    explicit FailingMTMS(const DataInterfaceBase& dataIface);
+
+    /**
+     * @brief Constructor
+     *
+     * Fills in this class's data fields from the stream.
+     *
+     * @param[in] pel - the PEL data stream
+     */
+    explicit FailingMTMS(Stream& pel);
+
+    /**
+     * @brief Flatten the section into the stream
+     *
+     * @param[in] stream - The stream to write to
+     */
+    void flatten(Stream& stream) override;
+
+    /**
+     * @brief Returns the size of this section when flattened into a PEL
+     *
+     * @return size_t - the size of the section
+     */
+    static constexpr size_t flattenedSize()
+    {
+        return Section::flattenedSize() + MTMS::flattenedSize();
+    }
+
+    /**
+     * @brief Returns the machine type+model as a string
+     *
+     * @return std::string the MTM
+     */
+    std::string getMachineTypeModel();
+
+    /**
+     * @brief Returns the machine serial number as a string
+     *
+     * @return std::string the serial number
+     */
+    std::string getMachineSerialNumber();
+
+  private:
+    /**
+     * @brief Validates the section contents
+     *
+     * Updates _valid (in Section) with the results.
+     */
+    void validate() override;
+
+    /**
+     * @brief Fills in the object from the stream data
+     *
+     * @param[in] stream - The stream to read from
+     */
+    void unflatten(Stream& stream);
+
+    /**
+     * @brief The structure that holds the TM and SN fields.
+     *        This is also used in other places in the PEL.
+     */
+    MTMS _mtms;
+};
+
+} // namespace pels
+
+} // namespace openpower