Hot And High Operations

Question 1

Density Altitude

Answer 1

Pressure altitude corrected for non standard temperature.

DA = PA + 1000ft per 8degC above ISA

For any given IAS, the less dense the air is, the greater the TAS will be, therefore the energy of the aircraft is greater.

Effects:

• Increased turn radius
• Greater distance needed to decelerate.
• Higher vertical speeds for a given profile
• Faster touchdown speeds. Ensure IFLC calculation is carried out.

Question 2

Altimeter Error

Answer 2

High temperatures also cause altimeter to under read.

10degC difference from ISA = 4% height error.

Question 3

Intercepting GP from above

Answer 3

1) Ensure LOC is captured
2) Arm APP
3) Select lowest safe altitude (1000 aal)
4) Select V/S appropriate to capture G/S. (in some case greater than 1500ft may be required)