Switzerland Blocks Leopard 2 Spare Parts After RUAG Inquiry Flags Risks

Switzerland's defence ministry has ordered a block on potentially non-approved spare parts held in the warehouses and workshops of state-owned defence contractor RUAG after a forensic inquiry raised the possibility that components made using transferred technical drawings entered the supply chain for the army's Leopard 2 tanks. The ministry announced the measure on 30 October 2026, saying it and RUAG had also taken steps to maintain the tanks' operational readiness. The official announcement does not establish that a defective component has been installed in a tank or caused an accident.

The Federal Department of Defence, Civil Protection and Sport (VBS) said the inquiry by law firm Niederer Kraft Frey identified serious compliance failures and indications of possible criminal conduct in earlier RUAG activities. The firm's board commissioned the inquiry in August 2023 after irregularities involving Leopard 1 tank business. The review's findings were delivered to the ministry, which described the potential presence of components from unauthorised manufacturers as a risk requiring precautionary restrictions.

The ministry said it had blocked all replacement parts in RUAG stores and workshops that could have come from manufacturers lacking approval. This is a targeted precaution concerning potentially affected inventory, not an announcement that Switzerland has grounded its entire Leopard 2 fleet. VBS said measures had been taken to preserve the fleet's ability to operate.

RUAG disputes any implication of an identified operational safety danger. According to Swiss public broadcaster SRF's 30 October reporting, RUAG board chair Jürg Rötheli said the relevant items had been examined and were not safety-critical, and that no safety risk had been identified on the information currently available. SRF also reported that the company acknowledged weaknesses in controls and said corrective measures were being implemented. Those statements should be distinguished from the ministry's precautionary decision: neither amounts to a final independent determination of every component's provenance.

The spare-parts action follows a longer dispute over how RUAG managed material belonging to the army. Switzerland's independent Federal Audit Office reported in a February 2025 examination that it could not determine the total value of consignment stocks for tracked vehicles because purchased material was written down immediately. Its audit also identified 1,140 scrappings and 1,319 inventory adjustments made by RUAG during 2014–2023 without authorisation from the army logistics base. Those are recorded control failures; the counts do not, on their own, establish theft or the value of a financial loss.

Criminal proceedings involving former RUAG employees are continuing in Switzerland and Germany, the ministry said, and RUAG has a civil damages claim before a Swiss court. The individuals concerned are presumed innocent. The existence of a criminal investigation or a damages demand is not a conviction or a final finding that the full sum claimed was lost.

Defence Minister Martin Pfister has ordered a working group to review the inquiry, assess responsibility within RUAG and the federal owner's oversight, and determine whether additional action is required. VBS expects to report its findings to the Federal Council in two to three months from 30 October. A parliamentary committee has also postponed consideration of a broader law governing federal armaments companies until early 2027 at the earliest, so the inquiry can inform the proposed structure.

The next test of accountability is whether the federal review identifies the origin and status of affected parts, documents the effectiveness of controls, and explains any additional action taken. For now, the confirmed public-interest development is the inventory restriction and federal oversight response, not a finding that specific personnel committed a crime or that the army's tanks were unsafe.