TRANSPORTATION LOCATIONS (see Figure 514.8D-3)	NARROWBAND LEVEL L0 (g2/Hz)
In fuselage or wing forward of propeller	0.1
Within one propeller blade radius of propeller passage plane	1.2
In fuselage or wing aft of propeller	0.3
In engine compartment, empennage, or pylons	0.6
1/ For Materiel mounted to external skin, increase level by 3 dB.
2/ f0 = blade passage frequency (propeller rpm times number of blades) (Hz).          f1 = 2 × f0  f2 = 3 × f0  f3 = 4 × f0
3/ Test should be conducted as sine-on-random, with:           S0 = 1.414 * √(0.1 * f0 * L0)
4/ Sine tones may be swept to account for known variance in blade passing frequency.
5/ C-130 Aircraft: 4 blade propeller - f0 = 68 Hz (C-130K); 6 blade propeller - f0 = 102 Hz (C-130J)
6/ Endurance test duration per axis: 1 hour for 1000 hours of flight.