Flight data parameter
Normal acceleration
Acceleration measured broadly along the aircraft's vertical body axis; its touchdown peak can help characterize a landing load when interpreted with other signals.
Typical unitg
Signal examplesvertical accelerationNznormal load factor
A short peak may support detection and engineering review of a suspected high-load landing, but recorder sampling, filtering, sensor location, weight, and aircraft response all affect interpretation.
1TaxiRelevant
2TakeoffRelevant
3Initial ClimbRelevant
4ClimbRelevant
5CruiseRelevant
6DescentRelevant
7ApproachRelevant
8LandingRelevant
9Go AroundRelevant
Normal accelerationIllustrative trace · not recorded flight data
gHighRefLow
MONITORING GATE
04 · Typical monitoring uses
- Candidate high-load landing detection
- Turbulence and manoeuvre context
- Correlation with pilot or maintenance reports
05 · Possible exceedances
- Peak load above an aircraft- and programme-specific event threshold
- Repeated oscillatory loads during a bounced landing
Structural or landing-gear loadUnreported inspection requirementFalse classification if used alone
07 · Investigation questions
Questions before conclusions
- Q1
Was the peak at main-gear touchdown?
- Q2
What were vertical speed, pitch, roll, and weight?
- Q3
Does the applicable maintenance logic require inspection or engineering review?