approach climb 2.1% vs MACG 2.5% or greater
Can someone explain to me the difference between
Approach climb limited weights (2.1%) and Missed approach climb Gradient weights (2.5% or greater)
Here is what I know
- For Approach climb limited weights
-the aircraft climb capability in go around climb config with 1 engine inop, gear retracted and F15 must meet or exceed 2.1% climb gradient
- For CatII/III MACG limited weights at 2.5% climb gradient must be met(one engine out)
- Also for example at FUERTEVENTURA ILS 01R the MACG = 4.0%, so we must ensure that the landing weight does not exceed the MACG weight at the current conditions i.e Temperature and pressure Altitude . So for this we would use the tables for MACG limited weights for grad 4.0% (one engine out)
-The nominal climb gradient of a missed approach based on ICAO PANS-OPS is 2.5%
- Basically for both, if the weight is limiting i.e. less than max landing weight then this should be put in on the load sheet to determine allowed traffic load.
So which one do we use?
Using FUERTEVENTURA ILS 01R as an example
OAT 40 degrees and airport elevation 50 feet
Approach climb limited weight = 74300kg (based on 2.1%)
4.0% MACG limited weight = 61700kg
Obviously Im gonna use the lowest value, but I'd like to know why there are two types. What are the differences.
Thanks in advance. Its been bugging me all morning trying to figure out the differences