1.   Cleaning a floppy disk drive should be part of a regular maintenance procedure.

2.   British Nuclear Fuels said the sabotage affected a robotic arm handling nuclear waste used in maintenance procedures that controlled six separate operations.

3.   David Shipley, a spokesman for USAir, said the carrier had not changed its maintenance procedures following the crash.

4.   Do they have the same maintenance procedures as Delta?

5.   Engineers eventually traced the shutdown, which began during an early-morning maintenance procedure, to a combination of software bugs and human error.

6.   Government reports subsequently blamed the crash on design deficiencies and maintenance procedures.

7.   Its maintenance procedures are so well regarded that the company makes an unusually large amount of money by selling its used aircraft to other airlines, analysts said.

8.   Lajous said the blast was probably caused by poor execution of standard maintenance procedures.

9.   Many airlines choose to avoid that as a way to simplify maintenance procedures and reduce costs.

10.   Maintenance procedures had not been followed.