TP 13706 - Technical Evaluation Engineering
We recommend that other tests in the field be made to confirm the above conclusions which would also consider other parameters, such as the cooling effect of the wind, the effect of the sun on the observation of the output signal from distances greater than the 12 foot laboratory distance, the "real world" frost deposit thickness and deposit rate of, as well as other meterological conditions. We also need to establish a scientific way of calculating the degradation of the PAPI to what would be considered as a false signal, from a true signal.
Based on these tests results, the PAPI must be energized at least 53.5 minutes before any airplane landing or remain energized at 6.6 Amp at all time.
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