HC Deb 13 December 1999 vol 341 cc23-4W
22. Mr. Bill O'Brien

To ask the Secretary of State for Defence what is the minimum estimated life of wiring in military aircraft; and if he will make a statement. [100975]

Mr. Spellar

Replacement intervals for electrical wiring are not prescribed in advance. Wiring is rigorously inspected during maintenance and replaced as necessary.

Mrs. Dunwoody

To ask the Secretary of State for Defence how many military aircraft have been grounded as a result of advice on the safety of Kapton wiring. [100925]

Mr. Spellar

None. However, following two instances of electrical fires on RAF Harrier aircraft in 1991, the Harrier GR5 and GR7 fleets were restricted to operational flying only for a short period. Subsequent investigation showed that the fires had occurred as a result of the mis-routeing of wires. Modifications were subsequently introduced to improve the electrical installation.