English translation: operational test or operational testing
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Do a kudoz search for "fonctionnement". There's a lot of excellent suggestions for various contexts, some from native speakers (!) altho admitedly your phrase is *usually* rendered as verif AU bon f. (sometimes with "aptitude" added).
14:06 Feb 18, 2005
Automatic update in 00:
9 mins confidence: peer agreement (net): +4
vérification de bon fonctionnement
verification of good working order
Explanation: Minimum Equipment List (MEL)
A list of aircraft equipment that must be in good working order before an aircraft may legally take off with passengers. Repairs to some items not essential to an aircraft's airworthiness may be deferred for limited periods of time approved by the FAA.