Message Name:

PANEL INTEGRAL LIGHTING UNSERVICEABLE

In the Flight Compartment, the Panel Integral Lighting does not come on and go off correctly when the Cockpit Lights (Integral) Control Panel is operated.

When the Master Switch on the Cockpit Lights (Integral) Control Panel is set to ON, the Panel Integral Lighting does not change when you operate one or more of the Circuit Breaker (CB), Left (L), Center (CTR), Right (R) or Over Head (OVHD) Control Switches.

When the Master Switch on the Cockpit Lights (Integral) Control Panel is set to auto, the Panel Integral Lighting does not change when the ambient lighting changes.

NOTE: The Panel Integral Lighting is a non-CAIMS system.

• Integral Lighting Power Supply 1 (A176)
• Integral Lighting Power Supply 2 (A177)
• Integral Lighting Power Supply 3 (A178)
• Cockpit Lights (Integral) Control Panel (AP26)
• Light Sensor Unit (A1)
• Inverter 1 (A179)
• Pilot Integral Lighting Power Supply (A183)
• Co-pilot Integral Lighting Power Supply (A185)
• Over Head Panel Inverter (A195)
• Circuit Breaker Panel Inverter (A200)
• Secondary Power Distribution Assembly (SPDA) 4 (A16)
• Light Sensor/Emergency Locator Transmitter (ELT) Panel (AP55)
• Electrical Management System Control-and-Display Unit (EMS CDU) 1 (A94)
• Electrical Management System Control-and-Display Unit (EMS CDU) 2 (A91)
• Associated Wiring

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

NOTE: An isolated control-panel lighting problem should be corrected independently.

1. Check if the fault shows in one or both the AUTO and ON operational modes.

   1. If NO, go to step 3.
   2. If YES, continue with next step.

2. Replace the COCKPIT LIGHTS (INTEGRAL) control panel. Perform the operational test of the COCKPIT LIGHTS (INTEGRAL) control-panel.

   1. If the operational test is satisfactory, do close out.
   2. If the operational test is not satisfactory, continue with the next step.

3. Check if the fault shows only in the AUTO mode or continues to show in both the AUTO and ON operational modes.

   1. If the fault continues to show in both the AUTO and ON operational modes, go to step 7.
   2. If the fault shows only in the AUTO mode, continue with the next step.

4. On the COCKPIT-LIGHTS (INTEGRAL) control-panel, MASTER switch is set to AUTO and all the rotary switches are set to BRT. Perform a continuity check between control panel (AP26P1) connector and ground as follows:
   NOTE: If the ambient light is too bright, cover the light sensor.

   From	To	Result
   AP26P1-7	Ground
   AP26P1-8	Ground

   1. If there is continuity, go to step 7.
   2. If there is no continuity, continue with next step.

5. Disconnect light sensor panel connector (AP55P1), perform a voltage check as follows:

   From	To	Expected Result	Result
   AP55P1-4	AP55P1-12	+28 VDC

   1. If there is no +28 VDC, perform a troubleshooting for the power source from SPDA 4 and continue with next step.
   2. If there is +28 VDC, continue with next step.

6. Disconnect the light sensor/ELT panel connector (AP55P1), the COCKPIT LIGHTS (INTEGRAL) control-panel connector (AP26P1), SPDA 4 connector (A16P1). Perform a continuity check between the connectors/terminals as follows:

   From	To	Result
   AP55P1-4	A16P1-E
   AP55P1-12	GS416
   AP55P1-5	GS417
   AP55P1-6	GS418
   AP55P1-2	AP26P1-7
   AP55P1-3	AP26P1-8

   1. If there is no continuity, repair or replace defective wiring as required and do close out.
   2. If there is continuity, connect the disconnected connectors and continue with the next step.

7. Disconnect the connectors A94P1 from EMS CDU 1 and A91P1 from EMS CDU 2, connectors AP26P1 and AP26P2 from the COCKPIT LIGHTS (INTEGRAL) control-panel. Perform a continuity check between the connectors/terminals that follows:

   From	To	Result
   A94P1-61	A26P1-5
   A91P1-61	AP26P2-4
   GM148-A	AP26P1-6
   GM148-B	AP26P1-10
   GM148-C	AP26P1-16

   1. If there is no continuity, repair or replace defective wiring as required and do close out.
   2. If there is continuity, connect the disconnected connectors and continue with the next step.

8. Disconnect the EMS CDU 1 connector (A94P1) and EMS CDU 2 connector (A91P1), the COCKPIT LIGHTS (INTEGRAL) control-panel connectors (AP26P1 and AP26P2). Perform a continuity check between the connectors/terminals as follows:

   From	To	Result
   A94P1-61	A26P1-5
   A91P1-61	AP26P2-4
   GM148-A	AP26P1-6
   GM148-B	AP26P1-10
   GM148-C	AP26P1-16

   1. If there is no continuity, repair or replace the defective wiring and do close out.
   2. If there is continuity, continue with the next step.

9. Connect the disconnected connectors. Perform the operational test of the COCKPIT LIGHTS (INTEGRAL) control-panel.

   1. If the operational test is satisfactory, do close out.
   2. If the operational test is not satisfactory, continue with the next step.

10. Check for Power supply 1 is active for panel integral lighting for the components?

    1. If YES, go to step 14.
    2. If NO, continue with the next step.

11. Perform the steps that follows:
    For the panels on the center pedestal in the flight compartment:

    • Audio Panel 1 (A8)
    • FMS Control-and-Display Unit 1 (A37)
    • MFD Control Panel 1 (A133)
    • Weather Radar Control Panel 1 (A122)
    • Mode Select Unit (A167)
    • Radio Management Unit 1 (A25)

    For the panels on the glare shield in the flight compartment:

    • PFD Control Panel 1 (A81)

12. On the power supply unit 1 (A176), perform a 28 VDC power check within power supply 1 that follows:

    From	To	Expected Result	Result
    A176P1-F	A176P1-W	28 VDC
    A176P1-G	A176P1-W	28 VDC

    1. If power check is not satisfactory, replace the power supply unit 1 (A176) and do close out.
    2. If power check is satisfactory, continue with the next step.

13. Check there is +28 VDC at SPDA 1 (A13). Disconnect the COCKPIT LIGHTS (INTEGRAL) control-panel connector (AP26P1), the power supply unit 1 connector (A176P1), the SPDA 1 connectors (A13P4 and A13P3). Perform a continuity check between the connectors/terminals as follows:

    From	To	Result
    A176P1-F	A13P4-e
    A176P1-G	A13P3-n
    A176P1-A	AP26P1-15
    A176P1-W	GS406
    A176P1-Z	GS407

    1. If there is no continuity, repair or replace defective wiring as required. Connect the disconnected connectors and do close out.
    2. If there is continuity, connect the disconnected connectors and continue with the next step.

14. Check for Power supply 2 is active to panel integral lighting for the components?

    1. If YES, go to step 18.
    2. If NO, continue with the next step.

15. Perform the steps that follow:
    For the panels in the center pedestal:

    • Audio Panel 2 (A9)
    • FMS Control-and-Display Unit 2 (A38)
    • FMS Control-and-Display Unit 3 (A218) (Optional)
    • MFD Control Panel 2 (A134)
    • Weather Radar Control Panel 2 (A92)
    • Reversion Control Panel (A132)
    • Radio Management Unit 2 (A26)

    For the panels on the glareshield in the flight compartment:

    • PFD Control Panel 2 (A82)

16. On the power supply unit 2 (A177), perform a 28 VDC power check within power supply unit 2 that follows:

    From	To	Result
    A177P1-F	A177P1-W
    A177P1-G	A177P1-W

    1. If power check is not satisfactory, replace the power supply unit 2 (A177) and do close out.
    2. If power check is satisfactory, continue with the next step.

17. Check there is +28 VDC at SPDA 1 (A13). Disconnect the COCKPIT LIGHTS (INTEGRAL) control-panel connector (AP26P1), the power supply unit 2 connector (A177P1), the SPDA 1 connectors (A13P4 and A13P3). Perform a continuity check between the connectors/terminals as follows:

    From	To	Result
    A177P1-A	AP26P1-14
    A177P1-W	GS408
    A177P1-Z	GS409
    A177P1-F	A13P4-e
    A177P1-G	A13P3-n

    1. If there is no continuity, repair or replace defective wiring as required. Connect the disconnected connectors and do close out.
    2. If there is continuity, connect the disconnected connectors and continue with the next step.

18. Check for Power supply 3 is active to panel integral lighting for the components?

    1. If YES, go to step 22.
    2. If NO, continue with the next step.

19. Perform the steps that follow:
    For the center pedestal in the flight compartment:

    • EICAS Control Panel (A173)

    For the center instrument panel in the flight compartment:

    • Standby Artificial-Horizon Indicator (M4)
    • Standby Airspeed/Altimeter Indicator (M3)

    For the glareshield in the flight compartment:

    • AFCS Guidance Panel (A79)
    • Standby Compass (M13)

20. On the power supply unit 3 (A178), perform a +28 VDC power check within power supply unit 3 as follows:

    From	To	Result
    A178P1-F	A178P1-D
    A178P1-G	A178P1-D

    1. If power check is not satisfactory, replace the power supply unit 3 (A178) and do close out.
    2. If power check is satisfactory, continue with the next step.

21. Check there is +28 VDC at SPDA 1 (A13) and SPDA 2 (A14). Disconnect the COCKPIT LIGHTS (INTEGRAL) control-panel connectors (AP26P1), the power supply unit 3 connector (A178P1), the SPDA 1 connector (A13P3) and SPDA 2 connector (A14P1). Perform a continuity check between the connectors/terminals as follows:

    From	To	Result
    A178P1-A	AP26P1-13
    A178P1-D	GS410
    A178P1-H	GS411
    A178P1-G	A13P3-n
    A178P1-F	A14P1-K

    1. If there is no continuity, repair or replace defective wiring as required. Connect the disconnected connectors and do close out.
    2. If there is continuity, connect the disconnected connectors and continue with the next step.

22. Check for Inverter 1 (A179) is active to panel integral lighting for the components?

    1. If YES, go to step 26.
    2. If NO, continue with the next step.

23. Perform the steps that follow:
    For the center pedestal in the flight compartment:

    • Landing-Gear Control Panel (AP22)
    • Emergency/Parking Brake Handle (A175)
    • Spoiler Control Lever (MT135)
    • Engine (EPR/N1) and GPWS Control Panel (AP25)
    • AIL/RUD/STAB TRIMS Control Panel (AP20)
    • Throttle Quadrant (AP41)
    • Gnd Lift Dumping and Autobrake Control Panel (AP23)
    • Slat/Flap Control Unit (MT79)
    • Cockpit Lights (FLOOD/DISPLAY) Control Panel (AP27)

    For the glareshield in the flight compartment:

    • MASTER WARNING/CAUTION Panel (AP15)
    • MASTER WARNING/CAUTION Panel (AP16)

24. On the inverter (A179), perform a 28 VDC power check as follows:

    From	To	Result
    A179P1-U	A179P1-W
    A179P1-V	A179P1-W

    1. If power check is not satisfactory, replace the inverter (A179) and do close out.
    2. If power check is satisfactory, continue with the next step.

25. Check there is +28 VDC at SPDA 1 (A13). Disconnect the COCKPIT LIGHTS (INTEGRAL) control-panel connector (AP26P1), the inverter 1 connector (A179P1), the SPDA 1 connectors (A13P4 and A13P3). Perform a continuity check between the connectors/terminals as follows:

    From	To	Result
    A179P1-N	AP26P1-2
    A179P1-A	AP26P1-9
    A179P1-W	GS403
    A179P1-X	GS404
    A179P1-Y	GS405
    A179P1-U	A13P4-e
    A179P1-V	A13P3-n

    1. If there is no continuity, repair or replace defective wiring as required. Connect the disconnected connectors and do close out.
    2. If there is continuity, connect the disconnected connectors and continue with the next step.

26. Check for Pilot Integral Lighting Power Supply is active to panel integral lighting for the components?

    1. If YES, go to step 30.
    2. If NO, continue with the next step.

27. Perform the steps that follow:
    For the side instrument panel (pilot) in the flight compartment:

    • EMS CDU 1 (A94)
    • Digital Clock 1 (M5)
    • Stall Protection Panel (AP19)

    On the side console (pilot) in the flight compartment:

    • Lasertrak Navigation Display Unit (M2)
    • Headset Jacks Panel (AP44)

28. On the power supply unit (pilot side console) (A183), perform a +28 VDC power as follow:

    From	To	Result
    A183P1-F	A183P1-D

    1. If power check is not satisfactory, replace the power supply unit (A183) and do close out.
    2. If power check is satisfactory, continue with the next step.

29. Check there is +28 VDC at SPDA 1 (A13). Disconnect the COCKPIT LIGHTS (INTEGRAL) control-panel connector (AP26P1), the power supply connector (A183P1), and the SPDA 1 connector (A13P4). Perform a continuity check between the connectors/terminals as follows:

    From	To	Result
    A183P1-A	AP26P1-11
    GM148-G	AP26P1-12
    A183P1-F	A13P4-F

    1. If there is no continuity, repair or replace defective wiring as required. Connect the disconnected connectors and do close out.
    2. If there is continuity, connect the disconnected connectors and continue with the next step.

30. Check for Co-pilot Integral Lighting Power is active to panel integral lighting for the components?

    1. If YES, go to step 34.
    2. If NO, continue with the next step.

31. Perform the steps that follow:
    For the side instrument panel (copilot) in the flight compartment:

    • EMS CDU 2 (A91)
    • Digital Clock 2 (M6)
    • Stall Protection Panel 2 (AP32)

    On the side console (copilot) in the flight compartment:

    • PASSENGER OXYGEN control panel (AP36)
    • MACH TRANSDUCER/PITOT STATIC control panel (AP29)
    • Headset Jacks Panel (AP45)

32. On the power supply unit (copilot side console) (A185), perform a 28 VDC power check as follow:

    From	To	Result
    A185P1-F	A185P1-D

    1. If power check is not satisfactory, replace the power supply unit (A185) and do close out.
    2. If power check is satisfactory, continue with the next step.

33. Check there is +28 VDC at SPDA 4 (A16). Disconnect the connectors AP26P2 from the COCKPIT LIGHTS (INTEGRAL) control-panel, A185P1 from the power supply and A16P1 from the SPDA 4. Perform a continuity check between the connectors/terminals as follows:

    From	To	Result
    A185P1-A	AP26P2-11
    GM148-D	AP26P2-12
    A185P1-F	A16P1-K

    1. If there is no continuity, repair or replace defective wiring as required. Connect the disconnected connectors and do close out.
    2. If there is continuity, connect the disconnected connectors and continue with the next step.

34. Check for Over Head Panel Inverter is active to panel integral lighting for the components?

    1. If YES, go to step 37.
    2. If NO, continue with the next step.

35. Perform the steps that follow:
    For the overhead panel in the flight compartment:

    • Bleed-Air Control Panel (AP8)
    • PRESSURIZATION Control Panel (AP9)
    • WINDSHIELD HEAT Control Panel (AP10)
    • EXTERNAL LIGHTS Control Panel (AP11)
    • PASS SIGN/EMER LIGHTS Control Panel (AP13)
    • AURAL WARNING Control Panel (AP2)
    • ELECTRICAL Control Panel (AP3)
    • HYDRAULIC Control Panel (AP4)
    • FUEL Control Panel (AP5)
    • ENGINE Control Panel (AP6)
    • APU Control Panel (AP7)
    • Fire Handles Panel (AP12)

36. On the inverter (A195), perform a 28 VDC power check as follows:

    From	To	Result
    A195P1-U	A195P1-W
    A195P1-V	A195P1-W

    1. If power check is not satisfactory, replace the inverter (A195) and do close out.
    2. If power check is satisfactory, continue with the next step.

37. Check there is +28 VDC at SPDA 1 (A13). Disconnect the COCKPIT LIGHTS (INTEGRAL) control-panel connector (AP26P2) and the inverter connector (A195P1). Perform a continuity check between the connectors/terminals as follows:

    From	To	Result
    A195P1-A	AP26P2-9
    GM118-J	AP26P2-10
    A195P1-W	GS610
    A195P1-X	GS611
    A195P1-Y	GS612

    1. If there is no continuity, repair or replace defective wiring as required. Connect the disconnected connectors and do close out.
    2. If there is continuity, connect the disconnected connectors and continue with the next step.

38. Check for Inverter Circuit Breaker Panel is active to panel integral lighting for the components?

    1. If YES, do close out.
    2. If NO, continue with the next step.

39. Perform a +28 VDC power check as follows:

    From	To	Result
    A200P1-G	A200P1-J

    1. If power check is not satisfactory, go to step 41.
    2. If power check is satisfactory, continue with the next step.

40. Check there is +28 VDC at SPDA 1 (A13). Disconnect the connectors AP26P2 from the COCKPIT LIGHTS (INTEGRAL) control-panel, A200P1 from inverter and A13P3 from the SPDA 1. Perform a continuity check between the connectors/terminals as follows:

    From	To	Result
    A200P1-A	AP26P2-13
    GS460	AP26P2-14
    A200P1-J	GS790
    A200P1-F	GS791
    A200P1-E	GS792
    A200P1-G	A13P3-L

    1. If there is no continuity, repair or replace defective wiring as required. Connect the disconnected connectors and do close out.
    2. If there is continuity, connect the disconnected connectors and continue with next step.

41. Replace Inverter Circuit Breaker Panel.
42. Do close out.