Page:Report of the Board of Inquiry into the Helderberg air disaster.djvu/93

Rh temperature. The results can be summarised as follows:

(1) During level flight (1g) and manoeuvres within the operational spectrum (1g plus/minus 0,3g) the fuselage monocoque structure (skin and stringers) above the main deck floor is subjected to tensile loads.

(2) Damage to the crown structure is more critical than below stringer 4.

(3) The maximum operating manoeuvre loads are 1g plus/minus 0,3g. This represents an operational flight spectrum between 1,3g and 0,7g.

(4) A 1,3g manoeuvre is the maximum operating flight condition at cruise altitude combined with the normal cabin pressure of 8,9 pounds per square inch (psi).

(5) At the maximum operating manoeuvre load of 1,3g wlthout cabin pressurisation the structure will tolerate damage to the skin between stringers 13L and 13R even if the 26