(1)  
Pilot's Autopilot Disengage Light

(2)  
Copilot's Autopilot Disengage Light

(3)  
Master Caution Lights and Annunciators

(4) 
 Inboard Antiskid Light

(5) 
 Outboard Antiskid Light

(6)  
Fire Warning Light

(7) 
 MDA Lights

543 
33-15-0 Page 104  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  Feb 15/73 

MASTER WARNING AND CAUTION LIGHTS - ADJUSTMENT/TEST
1. General
A.  The following procedures provide instructions for testing the operation of the master caution lights and system master caution annunciators as part of the master dim and test functional checks. The following tests are partial tests and do not test all systems master caution circuits. Each system indicator light and the corresponding test of the master caution and dim and test circuits are checked as part of the associated system test. Refer to the appropriate system chapter for the test of a system indicator light and associated system master caution annunciator section operation.
2.  Master Caution Light Test
A.  Prepare to Test
(1)  
Provide electrical power.

(2)  
Close the following circuit breakers on load control center P6:

(a)  
Nine circuit breakers under INDICATOR MASTER DIM BUS: BAT, NO. 1 DC, NO. 2 DC, SECT 1, SECT 2, SECT 3, SECT 4, SECT 5 and SECT 6

(b)  
DIM & TEST

(c)  
Five circuit breakers under MASTER CAUTION: AIR COND, ANTI- ICE, FUEL, ANNUNCIATOR NO. 1, ANNUNCIATOR BAT

B.  Test Master Caution Lights
(1)  
Hold LIGHTS switch on center instrument panel P2 to TEST. Observe all system indicator lights, master caution lights and system master caution annunciators in the control cabin illuminate bright.

(2)  
Release LIGHTS switch to BRT.

NOTE:  Some lights may not go off if system has a fault circuit operating which keeps system light on (such as a door open when on the ground). This is normal. If a system is suspected faulty, trouble shoot system.

(3)  
Position LIGHTS switch to DIM. Observe lights dim.

(4)  
Position LIGHTS switch to BRT.

(5)  
Momentarily press pilot's MASTER CAUTION light. Observe master caution lights and system master caution annunciators are off.

(6)  
Momentarily press pilot's system master caution annunciator. Observe annunciators associated with systems with fault lights illuminated on P5 panel come on.

NOTE: All annunciator lights will illuminate while annunciator is held.

(7)  
Momentarily press pilot's MASTER CAUTION light. Observe master caution lights and system master caution annunciators are off.

(8)  
Momentarily press copilot's system master caution annunciator. Observe annunciators associated with systems with fault lights illuminated on P5 panel come on.

(9)  
Momentarily press copilot's MASTER CAUTION light. Observe master caution lights and system master caution annunciators are off.

NOTE: If light is dim, one of the bulbs is burned out. Replace bulbs as necessary.
543 
Feb 01/96  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  33-15-0 Page 501 

C.  Return Airplane to Normal
(1)  Remove electrical power if no longer required.
3.  Master Caution Lights Power Sources Test
A.  Referenced Procedures
(1)  AMM 24-22-00/201, Manual Control
B.  Prepare to Test
(1)  
Supply electrical power (AMM 24-22-00/201).

(2)  
Make sure that these circuit breakers are closed:

(a)  P6 Load Control Center-Right 1) AIR COND 2) ANNUNCIATOR BAT 3) ANNUNCIATOR No. 1 4) ANTI-ICE 5) BATT 6) DC BUS INDICATION BATT 7) DIM and TEST 8) ENGINES MASTER CAUTION 9) FIRE PROTECTION DETECTION MASTER WARN AND CONT 10) FUEL 11) No. 1 DC 12) No. 2 DC 13) SECT 1 14) SECT 2 15) SECT 3 16) SECT 4 17) SECT 5 18) SECT 6
543 
33-15-0 Page 502  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  Feb 01/96 

C.  Test Master Caution Lights Power Sources
(1)  
On the P2 panel, push and hold the LIGHTS switch to the TEST position.

(2)  
Make sure that the following lights come ON:

(a) 
 Annunciator

(b) 
 Master Caution

(c)  
System Indicator

NOTE:  If an indicator light is not bright, then one of the two lamps is defective. Replace the lamps as needed.
(3)  
　
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