Dornier Undifferentiated or Other Model
Flight Crew Air Transport Pilot (ATP)
Confusion; Human-Machine Interface
Aircraft Equipment Problem Less Severe
General None Reported / Taken
Aircraft; Human Factors; Manuals
While conducting a Captain Proficiency Check; a Blue EICAS system status message 'HYD MAIN PMP INOP' was displayed on the EICAS after the execution of a simulated single engine missed approach. I immediately discontinued the check ride; instructed the Captain as the pilot flying to fly visually to the northwest practice area; that he had the use of the both engines; while I remained pilot not flying and consulted the QRH. Since this message is only advisory in nature the Do-328 QRH only lists what the message means and offers no course of action to follow. On the HYD system page of the MFD a blue 'INOP' was listed near the main pump with hydraulic pressure of approximately 2900 PSI being delivered by the DC standby pump. Once clear of controlled airspace I asked the Captain to climb above 5;000 FT and maintain terrain clearance. I then extended the landing gear normally and then the flaps to 32 degrees. After completing the descent and approach checklists I asked the Captain to turn back towards the airport; contacted the Tower and requested a full stop landing when we were 12 miles north of the field. The landing checklist was completed and NWS and Anti-Skid systems were available normally. Captain landed with no other anomalies.I used my best judgment and systems knowledge to deal with the situation at hand; I recognized that the DC hydraulic pump could deliver sufficient pressure to operate the roll spoilers; flaps; NWS; and wheel brakes (including anti-skid). This blue advisory (non warning; non cautionary) message should not be displayed in-flight. Further review of this advisory message being displayed in flight should be conducted.
Do328 Check Airman reports a Blue EICAS system status message 'HYD MAIN PMP INOP' during a simulated single engine go around. The flight eventually returns to the departure airport for an uneventful landing but the reporter questions why this EICAS message should be displayed when no crew action is required.