Лондон метрополитенінің 1992 жылғы вагондары: Жаңарту мен техникалық мәселелер

Electric multiple unit used on the Central and Waterloo & City lines of the London Underground

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Brush Electrical Machines LT130 DC motor Even so, the introduction of this stock was far from trouble free and there were many technical teething problems that had to be ironed out. Eighty five 8 car trains were ordered from BREL, each formed of four two car units (two units had driving cabs, the others were fitted with shunting controls). and was one of the first examples of microprocessor controlled traction featuring a fibre optic network to connect the different control units. The DC traction motors of LT130 type have separately excited fields and are controlled via GTO (Gate turn off) thyristors. Since 2003, voice artist Emma Clarke has provided recordings for the 1992 Stock DVA. The new announcer system also includes next station announcements, which the original system did not include. By 2009, the announcements changed to address other lines that are possible to interchange in alphabetical order. Clarke's voice lasted until the refurbishment of the rolling stock, when Adrian Hieatt became the voice of the 1992 Stock's announcer system. In January 2018, the announcements were again revised for certain stations, to include new lines and connections (such as London Overground, TfL Rail and the construction of station) that did not exist in 2003.

On 25 January 2003 a 1992 Stock train with approximately 500 people on board train derailed as it entered Chancery Lane station on the westbound line. The derailment resulted in one door being ripped off and a number of broken windows. 32 passengers received minor injuries. The cause of the derailment was determined to be the detachment of the rearmost traction motor on the fifth car, caused by a gearbox failure. The traction motor was then struck by the remainder of the train as it passed over it, causing the following bogies to derail. The entire 1992 Stock fleet was withdrawn from service the same afternoon, and the Central and Waterloo & City lines were closed for several weeks until modifications were made. This included fitting new traction motor bolts and secondary brackets to prevent a loose motor from striking the track and causing further damage. The lines re opened in stages from 14 March 2003. Work started in 2019 and has been heavily delayed due to the COVID 19 pandemic, and financial reasons. The first upgraded train was previewed in passenger service on 24 November 2023. Unreliable source: date=November 2023

In 2006, the Waterloo & City line was closed for several months to allow for track and signalling upgrade works. During this period, the 1992 Stock units in use on the line were removed by crane from Waterloo depot and taken by road to Wabtec Rail in Doncaster for refurbishment. External changes included repainting the trains, which were still in Network SouthEast livery, into London Underground's corporate livery. Internally, the handrails were repainted from Central line red to Waterloo & City line turquoise, new seat moquette was fitted and CCTV cameras were installed. Later, the units received the new "Barman" moquette fitted to the Central line units, but not the new lighting, window frames or front end.

In October 2014, it was announced that the 1992 stock would be replaced by a new semi articulated model referred to as the New Tube for London (NTfL). This has since slipped to 2025. While a cancellation or deferring was never officially announced, it has been implied that the initial order is now only for replacing the 1973 Stock on the Piccadilly line. TfL still has plans on replacing the 1992 Stock on the Central and Waterloo & City lines as well as the 1972 Stock found on the Bakerloo line with NTfL or a future model, but due to a lack of funding, it has been deferred to an unspecified date further in the future. Should a long term funding deal with the UK Government be made, this may happen sooner. The refurbishment may have delayed said order.