11.   The fire resulted from a chain of serious operating and supervisory lapses on the part of Valujet, its maintenance contractor Sabretech and the Federal Aviation Administration.

12.   Those on the professional side of the business who patronize Payless are home remodelers and repairmen and maintenance contractors.

13.   Even with the increased attention, Emery reportedly failed to fix the problems and failed to properly oversee the work of its maintenance contractors.

14.   Rail maintenance contractor Jarvis PLC said on Tuesday its inspectors had discovered loose nuts at the same switching mechanism just nine days before the crash and repaired it.

15.   The national government was forced to intervene Thursday to pay maintenance contractors who stopped work on the pumping system.