Most important, if a helicopter loses engine power (e.g., the engine fails or is shot out by hostile fire), it can still safely land by using autorotation (analogous to gliding without engine power for a fixed-wing aircraft).48 But this operational requirement for all other Navy helicopters was waived for the V-22, largely because it cannot autorotate. Elaine Grossman of Inside Defense reported of the V-22 that should a pilot lose engine power and try to restart it, autorotation descent cannot be maintained, [quotation from GAO report] which could ostensibly lead to a crash.49 In this respect, the V-22 may actually be less survivable than helicopters.Since it couldn't autorotate, the operational requirement was waived. Of course, now the V-22 aplogists will now accuse the Cato Institute of being liars in quoting liars in their report.