A320 Fmgc/mcdu

[ggofpac]

Does anyone know how to get the data from the fmgc in order to check the 1) g load on touch down and 2) V/S on touch down?

Also what G load is considered a hard landing?

Many thanks. :)

[FLX/MCT]

Hey ggofpac,

try "VGTD", as mentioned in another thread on pprune to get the G-load on touchdown. I am not sure if the system records the V/S upon t/d because I think that load factor gives a better indication for damage of aircraft's structure.

Nevertheless I've found a list of alpha-parameters. Check this (http://salamanca.khbo.be:8080/doks/do/files/FiSe8a8199820e31b83d010f0a0e7a640577/Alpha%20call-up.pdf;jsessionid=FEC122C46E7D2A2350820B7197C4C709?recordId= SKHB8a8199820e31b83d010f0a0e7a140574) link.

Also catch a view on a previous (http://www.pprune.org/tech-log/339809-g-load-determination-after-touchdown.html) thread treating the topic...


I hope I could help you

best regards from Austria,

Luke

[ggofpac]

thank you :).

[FatFlyer]

Hi,
you can select the AIDS function on the MCDU and from that menu select a load report (no.14)

if it is set to, it prints out with a G load of 2.6g on landing or a rad alt closure of 6 feet per sec on touchdown or 9 feet per sec 0.5 sec before touchdown.

An engineering check is then required.

If you are interested, the AAIB report from sometime last year (where the AIDS function was not set to report automatically and the plane flew a few more sectors before cracks in the main gear were noticed) explains the load
report quite well.

[MD83FO]

does anybody have a copy of the maintenance manual that explains the load report?

[Swedish Steve]

I Had an incident on an A330 last week.
Crew reported nil defects and left the aircraft. I then noticed that a Load report was on the printer.
It had printed out because of high rate of descent from the Rad Alt. But the landing rate of change of G was in limits. After scrutinising the parameters against the limits in Chap 05 Heavy landing, I could see that nothing needed doing.
On the load report is a statement. It usually says Normal landing, this one said high rate of rad alt change. There are 16 lines of figures at 0.125sec intervals, 8 before and 8 after the landing.
I had a chat with the training capt the next day when the crew returned. He said that he took over from the trainee pilot at touchdown, which saved the hard landing. I gave him the printout to discuss with the cadet FO!
The ACMS produces a landing report for every flight. They are all in the system, and can be accessed from the MCDU
for about the last 10 flights. Only if the parameters are out of limits are they printed out.