Re: DC-8s in service; no 707s?

Date:         27 Jan 97 02:45:56 
From: (Bizfixer)
Organization: AOL
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CFM-56 engines on DC-8s allow them to meet current noise requirements and
are also very efficient.  As far as I know, hush-kits for the 707 are
marginal on noise and the old engines so equipped are very
fuel-inefficient.  I believe USAF re-engined some 707s (AWACS?), but too
expensive for commercial use.