(a) If the landing is also overweight, the Overweight Landing Conditional Inspection, plus the Hard Landing Conditional Inspection, must be done as defined in the respective procedures. If damage is found in the Phase I Conditional Inspection of either procedure, then both Hard landing and Overweight Landing Conditional Inspection Phase II inspections must be done.

NOTE: for a hard landing that is overweight, the peak recorded vertical acceleration can be significantly less that the G-level thresholds provided for landings at or below the designed landing weight.

NOTE: When both the Hard Landing Conditional Inspection, and the Overweight Landing Conditional Inspection, as defined above, must be done, it is not necessary to do duplicative tasks twice, such as: Landing gear, nacelle struts, fuselage, wing LE fairings, horizontal stab, cargo area, engine inspection, flight controls, etc.

(a) If a structural examination is necessary, do the procedure “Phase I Inspection” in this section.

(b) For a landing at or below the maximum design landing weight on airplanes with flight data recording systems capable of at least eight (8) samples per second, the following can be used: An indication of a hard landing on the main landing gear is a peak recorded vertical acceleration that exceeds 2.1 G (incremental 1.1 G). This vertical accelerometer data must be measured by the flight data recorded accelerometer at a data sampling rate of at least eight (8) samples per second. This vertical acceleration G-level threshold is valid for a conventional landing with impact with no more than two (2) degrees of roll, main landing gear touchdown first and normal rotation onto the nose gear. For a hard landing that is a hard nose landing or is accompanied by more than two (2) degrees of roll at the time of main landing gear impact, the recorded peak acceleration can be significantly less than the 2.1. G, but a hard landing inspection may still be necessary.

(c) For a landing at or below maximum design landing weight on airplanes with flight data recording systems capable of at least sixteen (16) samples per second, the following can be used: An indication of a hard landing on the main landing gear is a peak recorded vertical acceleration that exceeds 2.2 G (incremental 1.2 G). This vertical accelerometer data must be measured by the flight data recorded accelerometer at a data sampling rate of at least sixteen (16) samples per second. This vertical acceleration G-level threshold is valid for a conventional landing with impact with no more than two (2) degrees of roll, main landing gear touchdown first and normal rotation onto the nose gear. For a hard landing that is a hard nose landing or is accompanied by more than two (2) degrees of roll at the time of main landing gear impact, the recorded peak acceleration can be significantly less than the 2.1. G, but a hard landing inspection may still be necessary.