AlliedSignal has been chosen by Boeing to develop a new APU for the B-767-400ER.

The new 331-400B APU (developed from the company's proven 331-350 unit, which has more than 600,000 hours' service on Airbus A330 and A340 aircraft) will provide up to 40% more power for the 767-400 - with a less than 13% weight penalty - compared with the APU on earlier versions of the aircraft.

Tom Johnson, AlliedSignal's vice-president, commercial auxiliary power, says: "We will deliver our first engine to test in April and FAA certification is scheduled for May 1999 to support the Boeing flight-test programme beginning in September 1999."

Source: Flight Daily News