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Aviation History
1949
1949 - 1145.PDF
JUNE 16TH, 1949 /iul eri iod extended to • • a tribute to a hours reliable engine * mai Overhaul periods for " Bristol " Hercules 630 and 670 series engines have been extended from 600 to 700 hours. Subsequent inspection of these engines has shown that this operating period between overhauls is well within their range. Approval of this life before overhaul is restricted to operators who have demonstrated by practical experience that this is consistent with operating conditions imposed and the degree of efficiency of maintenance services available. The original planned programme of overhaul extension, based on service experience, is being continued and, as a next step, certain selected engines will be run — with A.R.B. approval — to approximately 800 hours. . . • dependable sleeve-valve engines THE BRISTOL AEROPLANE COMPANY LIMITED. ENGLAND
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