diff --git a/maintenance.md b/maintenance.md
index c9a3da8..3b5761e 100644
--- a/maintenance.md
+++ b/maintenance.md
@@ -35,3 +35,4 @@ Newest entries at the bottom.
 - 2026-09-23: Escape pod batteries charged.
 - 2026-09-24: Galley fridge defrosted.
 - 2026-09-27: Escape pod batteries charged.
+- 2026-09-27: Comms backup tested.