21.   Using GE as a model, Boeing has recently embarked on a shopping spree, expanding into services like aircraft maintenance and the conversion of passenger jets into freighters.

22.   Previous air disasters in the area have been blamed on chronically poor aircraft maintenance or gunfire from the UNITA rebel group.

23.   Aircraft maintenance was up to date and there had been no suggestions before the accident the fuel record system was inadequate, he said.

24.   Also, several crashes in recent years have been blamed on inadequate aircraft maintenance at Luanda airport.

25.   Also, several crashes in recent years have been blamed on poor aircraft maintenance at Luanda airport.

26.   And aviation officials acknowledge a history of shortcomings in aircraft maintenance and airport facilities.

27.   Birgenair had accepted that claim, saying it was responsible for all Alas operations, including aircraft maintenance.

28.   But the Airlanka flights remained unaffected as senior engineers handled aircraft maintenance, said Reinzie Perera, a spokesman for the airline.

29.   But the Airlanka flights remained unaffected as senior engineers attended to aircraft maintenance, said Reinzie Perera, a spokesman for the airline.

30.   Four soldiers involved in aircraft maintenance have also died of cancer.