From our manual:
"Performance % Deterioration Allowance (PDA) This is a specific percentage (%), calculated from inflight performance monitoring, fuel correction/allowance to provide for deterioration of that aircraft performance from standard book figures."
Each aircraft is allocated a % which is periodically updated and reflected in each flightplan.
I only bring up the (possibly coincidental) fleetwide increase because it may support where I am going with this.
As aircrew, we do notice that the slower ECON speeds result in higher nose attitudes (say 3 degrees) which may well increase the PDA but I'm thinking only if its a bit higher than the CI calculation assumes. You can probably see where I'm going with this..... Has anyone reverted to higher CI's due to this issue?
As far as LRC goes, yeah normally .78 to .79 and according to the FCTM about CI30. By definition using a bit more fuel but thats not what I'm finding.