failure to fire

slant fire; diagonal fire; oblique fire; fire to the oblique

failure to control or report dangerous fire

fire control orders (FCO) ('Hold Fire', 'Cease Fire' and 'Engage')

selector lever, fire selector, fire switch, fire selector switch

deliberate failure

mean time between critical failure (MTBCF)

failure modes, effects, and criticality analysis

failure requiring overhaul

bearing failure

failure to extract

failure to return to battery

heat-break failure

intelligence failure

aircraft electrical failure

chance failure

complete failure

dependent failure

externally caused failure

failure detection

failure quota

flutter failure

fuel system failure

gradual failure

hydraulic failure

hydraulic pressure failure

mechanical failure

minor failure

multiple failure

overload failure

partial failure

power failure

progressive failure