Assertion: airbus's order | /r/HasProperty | placed for either l-500 version
Facets:
value: due to operational costs
type: CAUSE
Source sentences:
text: Although some interest was expressed by carriers, no orders were placed for either L-500 version, due to operational costs caused by low fuel efficiency, a significant concern for a profit-making carrier, even before the oil crisis of the 1970s, keen competition from Boeing's 747, and high costs incurred by Lockheed in developing the C-5 and later, the L-1011 which led to the governmental rescue of the company.