This month, we consider various aspects of air-cargo operations, including a report on how Boeing 707s are enjoying life extensions by means of modern renovation. Both cargo and passenger configurations are available (see pages 25-27). Here, we see another cargo aeroplane update — the second McDonnell Douglas DC8-55F placed in operation this year by Air Charter Services (ACS) of Farnham, Qudbec. Equipped with Quiet Nacelle Corporation's hush kit, the resulting lowered engine noise levels will permit operations well into the 1990s, according to this Canadian freight/livestock carrier.