Event Description
On 20 February 2016, at Warsaw Chopin Airport (EPWA), an Embraer 170-200 aircraft experienced an EICAS warning during taxi after de-icing. The crew observed the "A-I ENG2 LEAK" indication on the display and decided to return to the parking stand. After an inspection by mechanics, the aircraft was handed over to technical services for troubleshooting.
Maintenance Actions
On the first day of maintenance, technicians replaced the A-I ENG2 PRESSURE SWITCH (part number 1103P1113). The aircraft was subsequently released for service. However, the same EICAS warning reappeared the following day. The technical services again released the aircraft for operation in accordance with Minimum Equipment List (MEL) item 36-00-00A.
On 22 February 2016, maintenance replaced the NAPRSOV FILTER ELEMENT (NACELLE PRESS REG S/O VALVE). After this replacement, the aircraft was returned to service without limitations.
Cause
The investigation determined that the cause of the incident was a malfunction of the shut-off and pressure regulating valve.