With engine stopped, epr indicator read slightly above 1

The EPR (Engine Pressure Ratio) indicator is a measurement used in jet engines to indicate the ratio of the exhaust gas pressure to the inlet air pressure. It provides an indication of the engine's thrust output relative to its designed maximum thrust.

When the engine is stopped or not running, the EPR indicator should ideally read zero or very close to zero. A reading slightly above 1 on the EPR indicator when the engine is stopped could indicate a couple of possible scenarios:

1. **Instrument Calibration or Error:** It's possible that the EPR indicator is not calibrated correctly or there is a minor instrument error causing it to read slightly above 1. In such cases, it may not accurately reflect engine conditions when the engine is actually operating.

2. **Residual Pressure:** In some aircraft, especially older models or those with different engine configurations, there might be residual pressure or a static reading on the EPR indicator even when the engine is stopped. This residual pressure could cause the indicator to show a slight reading above zero.

3. **System Anomalies:** Occasionally, there could be anomalies in the engine or aircraft systems that affect instrument readings. This would require further inspection by maintenance personnel to diagnose and rectify.

In any case, if the EPR indicator is showing a reading slightly above 1 when the engine is stopped, it's recommended to:

- Verify the instrument calibration and functionality during routine maintenance checks.

- Consult the aircraft's maintenance manual or technical documentation for specific guidance on EPR indicator readings.

- Have qualified maintenance personnel investigate further if the reading persists or if there are concerns about instrument accuracy.

Ensuring accurate instrument readings is crucial for safe aircraft operation, so any discrepancies should be addressed promptly through proper maintenance procedures.