FD
Do you have any documentary reference about what you are stating? Because what
JS has produced is incomplete. I can vouch for OP DES post because I have those documents. Reproduced below:
Content:
Engine failed after V1
Question:
When are triggered “ENG START SEL … IGN” and “THR LEVER…..IDLE” on ECAM after Take off.
Answer:
In case of an ENG FAIL, only:
“ENG START SEL … IGN” is triggered since the aircraft is in flight phase 4 or 5. All others appropriate procedure beginning by: “THR LEVER…..IDLE” will be shown in flight phase 6 (1500 feet AGL) or 30 seconds after the lift off.
These logics ensure that the aircraft is above the required 400 feet AGL before the ECAM procedure is initiated.
Content:
Engine failure after V1, timing 30 sec.
Question:
On engine failure ECAM procedure is written:
. IF NO RELIGHT AFTER 30 S
ENG MASTER X ……………………….OFF
30 seconds from when or where?
Answer:
The 1st “ timer “(transparent to the crew) begins at the ECU failure detection. In fact, it is not a question of time but N2 rotation.
If flameout detected, ECU automatically energizes dual ignition.
Below 400 ft, when ignition has not been manually selected (rotary selector "norm", Ecam actions not started yet), and a relight does not occur before corrected N2 is below 40 percent, then ignition is discontinued and a complete air start sequence must be initiated; end of “auto relight” by ECU.
Above 400ft (Ecam actions started) ignition manually selected (rotary selector "ign/start") and a relight does not occur before N2 is below 47 %, then the FADEC will transition to an auto start sequence. There are the famous 30 seconds. Timing (30 seconds) starts as soon as Engine mode selector is set to START position and should be monitored by the crew by the mean of ‘’TAKE OFF CHRONO START’’ action;no further chrono start required for this.
If this auto start fails, the engine must be shutdown by setting Master switch OFF after 30 seconds in order to recycle FADEC and probably perform a “manual” relight in flight, if no damage.