1.   Guitarist Robbin Crosby sulks over an equipment failure.

2.   Construction faults, equipment failure and inadequate training of staff were given as the major causes of incidents.

3.   And many people may be curious about equipment failures, unscheduled landings and other incidents that stop short of accidents.

4.   Another cause of the disaster could be equipment failure.

5.   -- A willingness to tolerate a lot of small equipment failures.

6.   Accident causes include equipment failure, poor training, pilot error and just plain bad luck.

7.   But he said there was enough redundancy in its pipelines that there should not be a problem even if there were some equipment failures.

8.   But increasingly, experts believe the alarms have spurred enough action to prevent significant equipment failures in this country.

9.   FAA officials say that the system is already safe, and remains so even during equipment failures because controllers respond by diverting planes or putting them in holding patterns.