Chapter 1
Fatigue
Harsher than its type
How short were its legs?
Utilization isn’t graded for N809JM: too few of its flights were tracked to count its use fairly, in the full report too. So its free chapter here is Fatigue, which doesn’t depend on catching every flight.
Short legs put more pressurization cycles on the structure for the same time in the air. Worth checking its cycle-based inspection limits before a pre-buy.
Hours per landingLead measure. 24th percentile
Middle 1.6N809JM0.53+1.4 : 1middle Challenger 300 1.6 : 1
Short hops85th percentile
Middle 35%N809JM0%80%+45%middle Challenger 300 35%
Leg length21st percentile
Middle 471 nmN809JM200 nm1,000 nm+372 nmmiddle Challenger 300 471 nm
How its legs split
Share of N809JM’s legs by length, nm, in the twelve months