Default NAV1 inop

[scottb613]

Guys, i discover that HSI is working ONLY when engine is running. Another words, HSI is working only with vacuum pump running? Is it bug or not? I thought that HSI is electrical gauge and its powered by electricity like VOR2 gauge. Am i wrong?

Hi Folks,

My Century NSD-360A is vacuum powered...

Regards,
Scott


Sent from my iPad using Tapatalk

[CrewMember]

Guys, i discover that HSI is working ONLY when engine is running. Another words, HSI is working only with vacuum pump running? Is it bug or not? I thought that HSI is electrical gauge and its powered by electricity like VOR2 gauge. Am i wrong?

Hi Folks,

My Century NSD-360A is vacuum powered...

Regards,
Scott


Sent from my iPad using Tapatalk

Yes, but vacuum need only for gyro operation, not for nav information from GPS or NAV receivers

[CrewMember]

Problem solved! Now HSI is work, but still only with running engine. HSI work properly in both VLOC and GPS modes. Thanks for help guys!

[Nick - A2A]

That's good to hear Alexey.

Yes - I'd have though that in reality, only the HDG flag would be present under these conditions. (In other words, even without the gyro running, the NAV flag wouldn't display provided the unit had electrical power and the NAV1 radio was successfully tuned.)

Nick

[CrewMember]

That's good to hear Alexey.

Yes - I'd have though that in reality, only the HDG flag would be present under these conditions. (In other words, even without the gyro running, the NAV flag wouldn't display provided the unit had electrical power and the NAV1 radio was successfully tuned.)

Nick

That's right Nick. Fully agree.