AF 447 Search to resume (part2)

[Svarin]

thermalsniffer wrote :

How do the prim and sec faults layer into your scenario?

Here we need to refer to the MEL, where a procedure is outlined for a PRIM1 dispatch, or a SEC1 dispatch. In both cases, a fault message appears on ECAM 30 seconds after engine start. Let us assume then that a PRIM1 or a SEC1 turned OFF for whatever reason will trigger an ECAM message 30 seconds later (some kind of self-check or whatever it is FCCs do in these situations)

Let us then examine closely the timing of 3 ACARS messages :

2:13:45 WRN/WN0906010213 279002506F/CTL PRIM 1 FAULT
2:13:51 WRN/WN0906010213 279004006F/CTL SEC 1 FAULT
2:14:20 FLR/FR0906010213 22833406AFS 1,,,,,,,FMGEC1(1CA1),INTERMITTENT

FMGEC1 is a FLR message, its correlation window opened one minute before transmission, minus 5 seconds for ACARS sending, thus : 02:13:15.
PRIM1 FAULT and SEC1 FAULT are cockpit effects, but then let us factor in the 30 seconds delay as above. This gives a time of 02:13:15.

Interesting ?

Now more : both PRIM1 and SEC1 messages appear right after the "possible loss of signal" window.

Interesting ?