33 Lights Flashcards
Where is the press to test switch for the annunciators and master caution/warning located?
On the overhead panel.
There are 8 instrument indirect lights under the glareshield to illuminate the instrument panel. where is power sourced from?
triple fed bus - INSTR INDIRECT C/B, controlled by INSTR INDIRECT pot on overhead panel.
What can four of the 8 instrument indirect lights be powered from alternativly.
INSTRUMENT EMERGENCY LIGHTS switch, powered from the entry lights C/B off the hot or triple fed bus.
What areas are lit with the sidepanel lighting?
Right CB, upper and lower fuel panel edge lights, fuel qty guages.
Explain the construction of edge lighted panel assemblies
Outer plastic panel, printed circuit board with wheat lights soldered in. used to illuminate positions of switches etc.
The light dimming units consist of what?
3x 5 VDC power supplies and 1 Electroluminescent power supply, All controlled by pots in the overhead panel.
What output will the EL power supply provide?
28 VDC input, 115 VAC output
What annunciator will you receive when none of your cabin door switches are closed.
red, Cabin door CAS on the MFD
Describe your emergency exit sign lights.
During normal ops powered by aircraft, emergency powered by 4 C size batteries when its internal inertia switch gos off 1.5’gs. test function switch built in for testing.
What are cold cathode power supplies used for?
Changing the frequencies of your lighting.
What is used to test emergency lighting?
T-Light comparator.
