diff --git a/maintenance.md b/maintenance.md
index 90725c5..3f6f1f9 100644
--- a/maintenance.md
+++ b/maintenance.md
@@ -23,3 +23,4 @@ Newest entries at the bottom.
 - 2026-09-15: Water recycling filters replaced.
 - 2026-09-16: Coffee machine descaled.
 - 2026-09-16: Antenna realigned.
+- 2026-09-17: Cabin pressure sensors tested.