An EPR system reads slightly over 1, this would mean
- the transmitter datum point has moved and needs replacing
- no action required this is normal
- the indicator needs re-calibrating back to 1
Explanation from PART66Online
Engine pressure ratio is exhaust pressure divided by inlet pressure, so a running engine always reads slightly above 1.0 because the engine raises pressure. A value just over 1 is therefore the expected indication and requires no action; it does not indicate a shifted datum or a need to recalibrate the indicator to 1.
S
sasna asked · 3 Sep 2013
EPR should read 1, is there any tolerance in EPR ????????
Community Comments (1)
D
denbailey85
4 Oct 2013
Affected by external influences such as OAT, QFE
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