4.2 Inspections conditions. Unless otherwise specified (see 6.2), all inspections shall be
conducted under the following conditions:
a. Air temperature: 73 + 18°F (23 +10°C)
b. Barometric pressure: 28.5 (+2, -3) in. of mercury
[96.5 (+7, -10) kilopascals (kPa)]
c. Relative humidity: 50 +30 percent (%)