EGPWS LINE MAINTENANCE MANUAL
CAGE CODE: 97896
SCALE: NONE SIZE: A
DWG NO.: 060-4199-180
REV: G
SHEET 5 of 68
TABLE OF CONTENTS
1
INTRODUCTION..................................................................................................................................................... 8
1.1
S
COPE
...................................................................................................................................................................... 8
1.2
A
PPLICABILITY
........................................................................................................................................................... 8
1.3
R
EFERENCE
D
OCUMENTS
.......................................................................................................................................... 9
2
DESCRIPTION AND OPERATION ...................................................................................................................... 10
2.1
G
ENERAL
S
YSTEM
D
ESCRIPTION
..............................................................................................................................10
2.1.1
Enhanced Ground Proximity Warning Computer (EGPWC)..................................................................... 11
2.2
O
PERATION
............................................................................................................................................................. 11
2.2.1
Mode 1 – Excessive Descent Rate ........................................................................................................... 11
2.2.2
Mode 2A/2B - Terrain Closure Rate .......................................................................................................... 11
2.2.3
Mode 3 - Descent After Takeoff ................................................................................................................ 11
2.2.4
Mode 4A/4B/4C - Unsafe Terrain Clearance ............................................................................................ 11
2.2.5
Mode 5 - Descent Below Glideslope ......................................................................................................... 12
2.2.6
Mode 6 - Advisory Callouts (optional) ....................................................................................................... 12
2.2.7
Mode 7 - Windshear Detection (Optional for MK V/VII only)..................................................................... 14
2.2.8
Envelope Modulation (not available in MK VI/VIII -001)............................................................................ 14
2.2.9
Terrain Clearance Floor and Runway Field Clearance Floor ...................................................................14
2.2.10
Terrain Alerting and Display (optional) ...................................................................................................... 15
2.2.11
Peaks Display Mode (optional).................................................................................................................. 16
2.2.12
Geometric Altitude (GPS Required) .......................................................................................................... 16
2.2.13
Weather Radar AutoTilt (MK V and MK VII only) ...................................................................................... 16
2.2.14
System Display and Annunciation............................................................................................................. 17
2.2.15
Runway Awareness and Advisory System (option for MK V and MK VII only)......................................... 17
2.2.16
Stabilized Approach Monitor (option for MK V and MK VII only) ..............................................................17
2.2.17
Altimeter Monitor (option for MK V and MK VII only) ................................................................................ 17
2.2.18
Takeoff Flap Configuration Monitor (option for MK V and MK VII only) .................................................... 18
2.2.19
Long Landing Monitor (option for MK V and MK VII only)......................................................................... 18
2.2.20
Low Airspeed Monitor (MK V Boeing 737NG only) ................................................................................... 18
2.2.21
Lamp Format ............................................................................................................................................. 19
2.3
S
YSTEM
M
AINTENANCE
............................................................................................................................................ 20
2.3.1
Maintenance Philosophy ........................................................................................................................... 20
2.3.2
System Operation During an Inop Condition............................................................................................. 20
2.3.3
BIT Description .......................................................................................................................................... 20
2.3.4
EGPWC Front Panel ................................................................................................................................. 21
2.3.5
Self-Test Functions.................................................................................................................................... 22
3
FAULT ISOLATION (TROUBLESHOOTING) ..................................................................................................... 23
3.1
G
ENERAL
................................................................................................................................................................ 23
3.2
T
ROUBLESHOOTING
G
UIDE
...................................................................................................................................... 23
3.3
L
EVEL
1
S
ELF
-T
EST
-
G
O
/N
O
G
O
T
EST
....................................................................................................................24
3.3.1
Self-Test Preamble.................................................................................................................................... 24
3.3.2
Short Level 1 Self-Test .............................................................................................................................. 25
3.3.3
Long Level 1 Self-Test............................................................................................................................... 26
3.4
L
EVEL
2
S
ELF
-T
EST
-
C
URRENT
F
AULTS
...................................................................................................................26
3.4.1
Current Faults - Internal ............................................................................................................................ 27
3.4.2
Current Faults - External ........................................................................................................................... 27
3.5
L
EVEL
3
S
ELF
-T
EST
-
S
YSTEM
C
ONFIGURATION
........................................................................................................33
3.6
L
EVEL
4
S
ELF
-T
EST
-
F
AULT
H
ISTORY
......................................................................................................................36
3.7
L
EVEL
5
S
ELF
-T
EST
-
A
LERT
H
ISTORY
......................................................................................................................37
3.8
L
EVEL
6
S
ELF
-T
EST
-
D
ISCRETE
I
NPUT
T
EST
............................................................................................................37
3.8.1
ARINC 552 / ALT 55 Radio Altitude Validity Flag Discretes ..................................................................... 38
3.8.2
GND Landing Gear Discrete ..................................................................................................................... 38