sddjd

Lights while on APU power?

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Just a question more out of curiosity than any problem. I've been flying quite a bit using the Etihad Cargo version from the Ops Center. I've noticed that usually the automatic systems disable exterior lights while on APU power (logo, wing, etc), and understand the reasoning behind this. However, fairly frequently I'm able to turn on the logo and wing lights during pushback while still only on APU. 

The only correlating detail I can find is that it seems like the lights work on APU power when I'm at a hot location (GOOY for example). Leaving much colder locales (HKJK  at 00:45 in Dec for example) seems to never provide exterior lights until engine start. 

Am I crazy (very possible) in seeing this connection? 😎

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Good place to start is the FCOM 6.20.1 Electrical Load Management System.

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I've never been in the cockpit of a 777 but I have some experience with 737's and Airbus. You can run all of the external lights off of the APU. When we moved aircraft from the remote stands you had to have the nav lights and beacon on. You could also turn on the logo light. I don't know why the 777 would be any different.

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On 12/18/2018 at 8:19 AM, downscc said:

Good place to start is the FCOM 6.20.1 Electrical Load Management System.

Yep, been there- what is strange to me is the different lights behavior under EXACTLY the same configuration at different airports.... just curiosity at least. 

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