diff --git a/src/components/main/MainUtm.jsx b/src/components/main/MainUtm.jsx
index 41788c4..efd29a5 100644
--- a/src/components/main/MainUtm.jsx
+++ b/src/components/main/MainUtm.jsx
@@ -27,9 +27,6 @@ const DETAIL = {
   date: "2025-06-10 14:30",
 };
 
-const PHASES = ["list", "detail", "confirm", "done"];
-const PHASE_DURATION = { list: 1800, detail: 2200, confirm: 1800, done: 2000 };
-
 function UtmSystemPanel({ phase, activeRow }) {
   return (
     <div className="utm-panel">
@@ -72,13 +69,8 @@ function UtmSystemPanel({ phase, activeRow }) {
         ))}
       </div>
 
-      {/* 상세: 아래로 펼쳐짐 */}
       <div
-        className={`utm-panel__detail${
-          phase === "detail" || phase === "confirm" || phase === "done"
-            ? " utm-panel__detail--show"
-            : ""
-        }`}
+        className={`utm-panel__detail${phase === "detail" || phase === "confirm" || phase === "done" ? " utm-panel__detail--show" : ""}`}
       >
         <div className="utm-panel__detail-title">비행계획 상세</div>
         <div className="utm-panel__detail-rows">
@@ -109,9 +101,7 @@ function UtmSystemPanel({ phase, activeRow }) {
           <div className="utm-panel__detail-row">
             <span>상태</span>
             <span
-              className={`utm-panel__status utm-panel__status--${
-                phase === "done" ? "done" : "wait"
-              }`}
+              className={`utm-panel__status utm-panel__status--${phase === "done" ? "done" : "wait"}`}
             >
               {phase === "done" ? "승인" : "대기"}
             </span>
@@ -142,7 +132,6 @@ function UtmSystemPanel({ phase, activeRow }) {
         </AnimatePresence>
       </div>
 
-      {/* 컨펌: 패널 안에서 블러 오버레이 */}
       <AnimatePresence>
         {phase === "confirm" && (
           <motion.div
@@ -185,21 +174,7 @@ function MainUtm() {
   const [activeRow] = useState(0);
   const cursorRef = useRef(null);
 
-  useEffect(() => {
-    if (!inView) return;
-    let t;
-    const run = (current) => {
-      const next = PHASES[(PHASES.indexOf(current) + 1) % PHASES.length];
-      t = setTimeout(() => {
-        setPhase(next);
-        run(next);
-      }, PHASE_DURATION[current]);
-    };
-    t = setTimeout(() => run("list"), 1000);
-    return () => clearTimeout(t);
-  }, [inView]);
-
-  // 커서 이동 로직
+  // ← useEffect 딱 하나만!
   useEffect(() => {
     if (!inView) return;
 
@@ -207,7 +182,13 @@ function MainUtm() {
     const cursor = cursorRef.current;
     if (!showcase || !cursor) return;
 
-    let timers = [];
+    let stopped = false;
+    const ids = [];
+
+    function sid(id) {
+      ids.push(id);
+      return id;
+    }
 
     function getPos(selector) {
       const el = ref.current?.querySelector(selector);
@@ -224,64 +205,68 @@ function MainUtm() {
       cursor.style.transform = `translate(${x}px, ${y}px)`;
     }
 
-    function click() {
+    function doClick() {
       cursor.classList.add("utm-cursor--click");
-      setTimeout(() => cursor.classList.remove("utm-cursor--click"), 250);
+      sid(setTimeout(() => cursor.classList.remove("utm-cursor--click"), 250));
     }
 
-    function after(ms, fn) {
-      const t = setTimeout(fn, ms);
-      timers.push(t);
+    function schedule(ms, fn) {
+      sid(
+        setTimeout(() => {
+          if (!stopped) fn();
+        }, ms),
+      );
     }
 
-    function loop() {
-      timers.forEach(clearTimeout);
-      timers = [];
+    function run() {
+      if (stopped) return;
 
       setPhase("list");
-      after(1000, () => {
+      moveTo(180, 160);
+
+      // 상세보기로 이동
+      schedule(1000, () => {
         const p = getPos(".utm-panel__row--active .utm-panel__btn");
         if (p) moveTo(p.x, p.y);
       });
 
-      after(2000, () => {
-        click();
-        after(200, () => setPhase("detail"));
-      });
+      // 상세보기 클릭 → detail
+      schedule(2000, () => doClick());
+      schedule(2200, () => setPhase("detail"));
 
-      after(3200, () => {
+      // 승인처리로 이동
+      schedule(3200, () => {
         const p = getPos(".utm-panel__approve-btn");
         if (p) moveTo(p.x, p.y);
       });
 
-      after(4200, () => {
-        click();
-        after(200, () => setPhase("confirm"));
-      });
+      // 승인처리 클릭 → confirm
+      schedule(4200, () => doClick());
+      schedule(4400, () => setPhase("confirm"));
 
-      after(5000, () => {
+      // 확인 버튼으로 이동
+      schedule(5000, () => {
         const p = getPos(".utm-confirm__ok");
         if (p) moveTo(p.x, p.y);
       });
 
-      after(5800, () => {
-        click();
-        after(200, () => setPhase("done"));
-      });
+      // 확인 클릭 → done
+      schedule(5800, () => doClick());
+      schedule(6000, () => setPhase("done"));
 
-      after(7500, () => loop());
+      // 반복
+      schedule(7500, () => run());
     }
 
-    moveTo(180, 160);
-    after(500, () => loop());
+    run();
 
     return () => {
-      timers.forEach(clearTimeout);
-      timers = [];
+      stopped = true;
+      ids.forEach(clearTimeout);
       cursor.classList.remove("utm-cursor--click");
-      setPhase("list"); // ← cleanup에서만 호출
     };
   }, [inView]);
+
   return (
     <section className="utm-hero" ref={ref}>
       <div className="utm-hero__blob utm-hero__blob--1" />
@@ -349,7 +334,6 @@ function MainUtm() {
 
           <UtmSystemPanel phase={phase} activeRow={activeRow} />
 
-          {/* 커서 */}
           <div className="utm-cursor" ref={cursorRef}>
             <div className="utm-cursor__dot" />
           </div>