Welcome to the CPL Performance question and answer forum. Please feel free to post your questions but more importantly also suggest answers for your forum colleagues. Bob himself or one of the other tutors will get to your question as soon as we can.
Just wanted to ask something in regards to landing chart ( 4 square boxes) In the CASA Performance exam I'm pretty sure i came across some questions asking me to find the landing distance available. Im a little confused now as i have been doing more practice exams and again more landing distance questions but i have noticed that it doesn't consider runway surface where as the CASA exam had the option to choose the runway surface. Am i missing something here or is that CASA way of putting additional information in the question to confuse you
In the practice exam questions that I'm doing there is no option to select runway surface so once i have go to the slope line i go straight through to the line that i drew up from my temp then find the LDA.
I am getting the answers correct where as in the exam i went to the reference line as it gave me the option.
Hi john, thanks for the reply. it was in the CASA exam and was a question i just remembered. Maybe you can answer this. Do you consider runway surfaces when figuring out maximum LDA available as in the Bob Tait supplement all the LDA charts do not consider runway surface. It basically goes from the slope line straight to the LDA.
OK .. guess we have to let that one through to the keeper ..
Mark, you are looking at a very murky area. In days of old, when the local flight manuals looked after this stuff for the smaller aircraft, it was straightforward ... the local P-charts had all the factors included. Since Ron Yates caused all his (airline) problems to be visited upon the GA fraternity quite a few years ago now, the local flight manuals have been binned and the rules, subsequently, require the original NAA data to be used.
One needs to be very careful using foreign data .. often it is NOT factored, especially for landing.
Note that the current Oz operational rules (
) require a variety of things to exist. Unfortunately, these rules DON'T require the certification side of things to take care of it .. end result is that the poor old operator and pilot are left to fend for themselves. If you don't use appropriate Industry consultants to do the legwork to determine just what your aircraft charts do or don't contain .. then you are on your little old lonesome ... just don't crash ...
Looking back at the operational CAO .. the charts should have some surface data. What you might use for the exams is a bit artificial in many cases .. what you need to do out on the line can be a bit difficult when it comes to dotting i's and crossing t's.
No simple way around it, I'm afraid. When the local certification rules were binned, the legal eagles didn't listen to the certification group voices in the wilderness which were sounding warnings about this and that ..
Well should you be concerned .. the confusion can be reduced by dint of research .. but you need to read up on the foreign TCDS and certification rules to get a handle on what's what ... sometimes one even has to resort to comms with the foreign NAA or OEM to find out just what was done for the particular certification. That's just the way things are, I'm afraid.
Engineering specialist in aircraft performance and weight control.