 On 15 November 1950, one unit was involved in the Hjuksebø train disaster, and the end car needed to be fully rebuilt.From 1 December 1956, when the whole Sørlandet Line to Stavanger was electrified, the service was extended and rebranded the "Stavanger Express".To free up sufficient stock, the "Østfold Express" was discontinued on 14 November 1956.