This document provides information about a maintenance and engineering training class on master warning and caution lights for the Boeing 737-800. It includes details about the instructor, class times and guidelines, objectives to locate components and describe their functions and interface. It also describes electrical power and distribution, routine servicing, and troubleshooting of the master warning and caution system.
11. The material cover on this course is for training and familiarization
purpose only and is not intended to supersede the Manufacturer
Maintenance Manual or any other regulatory approved data. Always
refer to your company procedures and never deviate from approved
Technical Data.
You are always responsible for the work you sign for.
Your SAFETY and those around you must be your #1 priority.
16. Student Objectives
Locate Major Components and Describe
Their Functions
Describe Panel Operation and Interface
Describe Electrical Power, Control and
Distribution
Describe Routine Servicing
Review MEL and Troubleshooting
17. Master Warning and Caution
The master caution system provides a visual alert to
the flight crew of unsafe airplane systems operation.
19. The annunciator and dimming
module is located above access
panels in the top of the nose
landing gear wheel well and is
mounted to the J19 panel which is
fastened to the bottom of the
flight compartment floor.
23. * Flight control panel
* IRS master caution unit
* Flight control panel
* Generator drive and
standby power panel
* APU indicator panel
* Overheat/fire protection panel
* Window heat panel
* Hydraulic panel
* System annunciators
* Engine panel
* Flight recorder/Mach airspeed
warning panel
* Air conditioning/bleed air
control panel.
24. Recall Check
• When performing a Recall Check.
– Depress and hold either System Annunciator Light Panel.
– Verify that both MASTER CAUTION Lights illuminate.
– Verify all lights have illuminated in both Annunciator Light Panels.
– Release the System Annunciator Light Panel.
If the MASTER CAUTION Lights remain illuminated, with or without
individual System Annunciator Lights, investigate the cause.
Under normal condition (no other malfunctions, good weather, etc.), recall
faults that reset when the MASTER CAUTION Light is pressed are dispatchable
and should be written up at the next destination. It is not necessary to call
Maintenance or run abnormal procedures from the QRH in these instances.
26. 6 Pack Warning and Caution
Lamp Replacement
CAUTION: REMOVE THE LAMP HOUSING WITH
YOUR FINGERS ONLY. IF YOU USE A TOOL TO HOLD
THE LAMP HOUSING, THE TOOL CAN CAUSE
DAMAGE TO THE HOUSING.
28. REVIEW
• The six pack lights are control by applying voltage or ground?
• What side is the hydraulic warning for the six-pack indicator?
• What controls the brightness of the warning indication?