diff --git a/src/expert-claim/expert-claim.service.ts b/src/expert-claim/expert-claim.service.ts
index 47d3ad9..996c956 100644
--- a/src/expert-claim/expert-claim.service.ts
+++ b/src/expert-claim/expert-claim.service.ts
@@ -63,6 +63,9 @@ import {
 export class ExpertClaimService {
   private readonly logger = new Logger(ExpertClaimService.name);
 
+  /** Matches blame v2 `workflow` lock TTL: locker may re-enter until expired, then others may open. */
+  private readonly claimV2WorkflowLockTtlMs = 15 * 60 * 1000;
+
   private readonly priceDropPart = {
     backFender: {
       Minor: 2,
@@ -2528,13 +2531,28 @@ export class ExpertClaimService {
     };
   }
 
+  /**
+   * True when another expert still holds an active (non-expired) workflow lock.
+   * Missing `lockedAt` on old documents: treat lock as still enforced until cleared.
+   */
+  private isClaimV2WorkflowLockCurrentlyEnforced(claim: any): boolean {
+    if (!claim?.workflow?.locked) return false;
+    const la = claim.workflow?.lockedAt as Date | string | undefined;
+    if (!la) return true;
+    return (
+      Date.now() <
+      new Date(la).getTime() + this.claimV2WorkflowLockTtlMs
+    );
+  }
+
   /**
    * V2: Get claim detail for damage expert
    *
    * Validations:
    * - Claim must exist and belong to the actor's insurer (`assertClaimCaseForTenant`)
-   * - Allowed when picking up/reviewing: WAITING_FOR_DAMAGE_EXPERT (if locked, only the locking expert)
-   * - Or when validating factors: WAITING_FOR_INSURER_APPROVAL + UNDER_REVIEW at EXPERT_COST_EVALUATION
+   * - Allowed when: WAITING_FOR_DAMAGE_EXPERT (queue), or EXPERT_REVIEWING (after lock — same expert must be able to reopen detail),
+   *   or factor-validation queue (WAITING_FOR_INSURER_APPROVAL + UNDER_REVIEW + EXPERT_COST_EVALUATION)
+   * - If an active workflow lock exists (15 min from lockedAt): only the locking expert; after expiry, any expert (tenant) may view
    */
   async getClaimDetailV2(
     claimRequestId: string,
@@ -2549,28 +2567,28 @@ export class ExpertClaimService {
 
     assertClaimCaseForTenant(claim, actor);
 
-    const isPickupReview =
-      claim.status === ClaimCaseStatus.WAITING_FOR_DAMAGE_EXPERT;
+    const isDamageExpertPhase =
+      claim.status === ClaimCaseStatus.WAITING_FOR_DAMAGE_EXPERT ||
+      claim.status === ClaimCaseStatus.EXPERT_REVIEWING;
     const isFactorValidationPending =
       claim.status === ClaimCaseStatus.WAITING_FOR_INSURER_APPROVAL &&
       claim.claimStatus === ClaimStatus.UNDER_REVIEW &&
       claim.workflow?.currentStep === ClaimWorkflowStep.EXPERT_COST_EVALUATION;
 
-    if (!isPickupReview && !isFactorValidationPending) {
+    if (!isDamageExpertPhase && !isFactorValidationPending) {
       throw new ForbiddenException(
         `This claim is not available for expert review. Current status: ${claim.status}`,
       );
     }
 
-    // If locked by someone else, deny access (initial pickup / assessment only)
-    if (
-      isPickupReview &&
-      claim.workflow?.locked &&
-      claim.workflow.lockedBy?.actorId?.toString() !== actorId
-    ) {
-      throw new ForbiddenException(
-        `This claim is locked by another expert: ${claim.workflow.lockedBy?.actorName}`,
-      );
+    const lockBlocksOthers = this.isClaimV2WorkflowLockCurrentlyEnforced(claim);
+    if (lockBlocksOthers) {
+      const lockerId = claim.workflow?.lockedBy?.actorId?.toString();
+      if (lockerId && lockerId !== actorId) {
+        throw new ForbiddenException(
+          `This claim is locked by another expert: ${claim.workflow.lockedBy?.actorName}`,
+        );
+      }
     }
 
     const hasCapture = (data: any, key: string) =>