TLA x EPR
I noticed on the graphics (FDR) that there is not a "consistency" between TLA and EPR. I am talking about engine #1 (the good one) TLA x EPR, after touchdown on the final landing and also on the landing at POA.
My questions are (considering only engine #1 / reverse operating):
1- EPR shouldn't be a result of TLA? (after touchdown)
1a- On the last landing, engine #1 TLA = -22,5º constant, against an EPR variation between 0.97 to 1.02.
1b- On the landing at Porto Alegre, engine #1 TLA = -22,5º (during ten seconds), against an EPR variation between 0.97 to 1.07.
2- Why EPR varies so much (0.97 to 1.07) given the same TLA (-22,5º)?
3- Why at the last landing, EPR on engine #1 didn't go over 1.02, and at Porto Alegre EPR got to 1.07 given the same TLA (-22,5º)?
I am not talking about engine performance (density altitude), I am just wondering if EPR shouldn't be a result of a given TLA...