I think that was after the one which caught fire on me in 141, Dan, during a supplementary air test. The aircraft had been 'stored' at RAF St. Athan and the ELRAT's voltage regulator had become corroded - hardly surprising, given the environment. The original air test had to be cut short because yet another voltage regulator had died on us during the shut down and relight section, giving that well-known VC10K loss of 1 & 3 busbars and no flight instuments. Until we got the engine going again, that is. Never seen so many MIs cross-line, pretty lights and warning flags!!
The ELRATs were then lim'd as you said - but only until they were re-inspected and a fleet-wide ELRAT-dropping session had been completed.