MAINTENANCE MANUAL
ENGINE FIRE PULL HANDLES — ADJUSTMENT / TEST
1. Engine Fire Pull Handle — Functional Test
A. Preparation
SPECIAL TOOLS AND TEST EQUIPMENT
Multimeter ..................................................................................................................... GSE2400116
Test leads (with 16 gauge insulated probes) ...................................................................... Standard
(1) References
• Safe Ground Maintenance Procedure, 20-00-00, Maintenance Practices
• Engine Fire Bottle - Removal / Installation, 26-21-03, Removal / Installation or Code
262020
• Auxiliary Power Unit Fire Bottle - Removal / Installation, 26-22-00, Removal /
Installation or Code 262030
(2) Aircraft Preparation
(a) Prepare aircraft for safe ground maintenance. See Safe Ground Maintenance
Procedure, 20-00-00, Maintenance Practices.
(b) Pull the following Circuit Breakers (CB):
CB NAME CB PANEL CB LOCATION
FIRE EXT SHOT #1 LEER ENGINE SYS / CTLS
APU FIRE EXT LEER ENGINE SYS / CTLS
FIRE EXT SHOT #2 REER ENGINE SYS / CTLS
(c) Disconnect, insulate and make accessible the following fire bottle electrical connectors:
NOTE: See Engine Fire Bottle - Removal / Installation, 26-21-03, Removal /
Installation or Code 262020 and Auxiliary Power Unit Fire Bottle - Removal /
Installation, 26-22-00, Removal / Installation or Code 262030 for location and
specific removal instructions.
CONNECTOR CARTRIDGE
CONNECTOR DEVICE REF DES
COLOR CONNECTOR
053E1P1 Blue band
Blue Left fire bottle 053E1 RIGHT
ENGINE
053E1P2 Red band LEFT
Red Left fire bottle 053E1
ENGINE
053E1P3 Yellow band
Yellow Left fire bottle 053E1
APU
053E2P1 Blue band
Blue Right fire bottle 053E2 RIGHT
ENGINE
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CONNECTOR CARTRIDGE
CONNECTOR DEVICE REF DES
COLOR CONNECTOR
053E2P2 Red band LEFT
Red Right fire bottle 053E2
ENGINE
(d) Apply electrical power to aircraft.
B. Procedure
WARNING: THE FIRE BOTTLES CONTAIN MATERIAL UNDER HIGH PRESSURE. RUPTURE
OF A DIAPHRAGM, BY EXPLOSIVE MEANS, RELEASES THIS MATERIAL IN A
VIOLENT MANNER. BOTH THE MATERIAL RELEASED AND THE EXPLODING
SQUIB CAN BE HAZARDOUS IF NOT PROPERLY HANDLED. ENSURE THE
ELECTRICAL CONNECTORS TO THE FIRE BOTTLES ARE DISCONNECTED
AND INSULATED BEFORE PERFORMING THIS PROCEDURE OR INJURY TO
PERSONNEL AND DAMAGE TO AIRCRAFT MAY OCCUR.
(1) Depress circuit breakers pulled in Step 1.A.(2)(b).
(2) Using multimeter, verify the following:
CONNECTOR FROM TO CONDITION
053E1P1 pin 1 pin 2 0 Vdc
053E1P2 pin 1 pin 2 0 Vdc
053E1P3 pin 1 pin 2 0 Vdc
053E2P1 pin 1 pin 2 0 Vdc
053E2P2 pin 1 pin 2 0 Vdc
(3) Depress solenoid button on left fire pull handle and pull handle up. Do not rotate handle.
(4) Using multimeter, verify the following:
CONNECTOR FROM TO CONDITION
053E1P2 pin 1 pin 2 0 Vdc
053E1P3 pin 1 pin 2 0 Vdc
053E2P2 pin 1 pin 2 0 Vdc
(5) Rotate left fire pull handle counterclockwise and hold.
(6) Using multimeter, verify the following:
CONNECTOR FROM TO CONDITION
053E1P1 pin 1 pin 2 0 Vdc
053E1P2 pin 1 pin 2 0 Vdc
053E1P3 pin 1 pin 2 0 Vdc
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CONNECTOR FROM TO CONDITION
053E2P1 pin 1 pin 2 0 Vdc
053E2P2 pin 1 pin 2 28 Vdc
(7) Pull the following circuit breaker:
CB NAME CB PANEL CB LOCATION
FIRE EXT SHOT #1 LEER ENGINE SYS / CTLS
(8) Using multimeter, verify the following:
CONNECTOR FROM TO CONDITION
053E2P2 pin 1 pin 2 0 Vdc
(9) Release left fire pull handle.
(10) Depress the following circuit breaker:
CB NAME CB PANEL CB LOCATION
FIRE EXT SHOT #1 LEER ENGINE SYS / CTLS
(11) Rotate left fire pull handle clockwise and hold.
(12) Using multimeter, verify the following:
CONNECTOR FROM TO CONDITION
053E1P1 pin 1 pin 2 0 Vdc
053E1P2 pin 1 pin 2 28 Vdc
053E1P3 pin 1 pin 2 0 Vdc
053E2P1 pin 1 pin 2 0 Vdc
053E2P2 pin 1 pin 2 0 Vdc
(13) Pull the following circuit breaker:
CB NAME CB PANEL CB LOCATION
FIRE EXT SHOT #2 REER ENGINE SYS / CTLS
(14) Using multimeter, verify the following:
CONNECTOR FROM TO CONDITION
053E1P2 pin 1 pin 2 0 Vdc
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(15) Release left fire pull handle.
(16) Depress the following circuit breaker:
CB NAME CB PANEL CB LOCATION
FIRE EXT SHOT #2 REER ENGINE SYS / CTLS
(17) Stow left fire pull handle by pushing handle down.
(18) Attempt to lift left fire pull handle, verifying handle is locked in stowed position.
(19) Gently attempt to rotate left fire pull handle both clockwise and counterclockwise, verifying
handle will not rotate.
(20) Depress solenoid button on right fire pull handle and pull handle up. Do not rotate handle.
(21) Using multimeter, verify the following:
CONNECTOR FROM TO CONDITION
053E1P1 pin 1 pin 2 0 Vdc
053E1P3 pin 1 pin 2 0 Vdc
053E2P1 pin 1 pin 2 0 Vdc
(22) Rotate right fire pull handle clockwise and hold.
(23) Using multimeter, verify the following:
CONNECTOR FROM TO CONDITION
053E1P1 pin 1 pin 2 0 Vdc
053E1P2 pin 1 pin 2 0 Vdc
053E1P3 pin 1 pin 2 0 Vdc
053E2P1 pin 1 pin 2 28 Vdc
053E2P2 pin 1 pin 2 0 Vdc
(24) Pull the following circuit breaker:
CB NAME CB PANEL CB LOCATION
FIRE EXT SHOT #1 LEER ENGINE SYS / CTLS
(25) Using multimeter, verify the following:
CONNECTOR FROM TO CONDITION
053E2P1 pin 1 pin 2 0 Vdc
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(26) Release right fire pull handle.
(27) Depress the following circuit breaker:
CB NAME CB PANEL CB LOCATION
FIRE EXT SHOT #1 LEER ENGINE SYS / CTLS
(28) Rotate right fire pull handle counterclockwise and hold.
(29) Using multimeter, verify the following:
CONNECTOR FROM TO CONDITION
053E1P1 pin 1 pin 2 28 Vdc
053E1P2 pin 1 pin 2 0 Vdc
053E1P3 pin 1 pin 2 0 Vdc
053E2P1 pin 1 pin 2 0 Vdc
053E2P2 pin 1 pin 2 0 Vdc
(30) Pull the following circuit breaker:
CB NAME CB PANEL CB LOCATION
FIRE EXT SHOT #2 REER ENGINE SYS / CTLS
(31) Using multimeter, verify the following:
CONNECTOR FROM TO CONDITION
053E1P1 pin 1 pin 2 0 Vdc
(32) Release right fire pull handle.
(33) Stow right fire pull handle by pushing handle down.
(34) Attempt to lift right fire pull handle, verifying handle is locked in stowed position.
(35) Gently attempt to rotate right fire pull handle both clockwise and counterclockwise, verifying
fire pull handle will not rotate.
C. Follow On
(1) Inspect for presence of foreign objects.
(2) Pull the following circuit breakers:
CB NAME CB PANEL CB LOCATION
FIRE EXT SHOT #1 LEER ENGINE SYS / CTLS
APU FIRE EXT LEER ENGINE SYS / CTLS
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CB NAME CB PANEL CB LOCATION
FIRE EXT SHOT #2 REER ENGINE SYS / CTLS
(3) Connect electrical connectors disconnected in Step1.A.(2)(c). See Engine Fire Bottle -
Removal / Installation, 26-21-03, Removal / Installation or Code 262020 and Auxiliary Power
Unit Fire Bottle - Removal / Installation, 26-22-00, Removal / Installation or Code 262030.
(4) Visually verify both fuel shut-off valves are in full OPEN position. See Figure 501.
NOTE: The valves are located on the rear wing spar above each pair of fuel boost pumps.
(5) Depress circuit breakers pulled in Step 1.C.(2).
(6) Record all maintenance actions in accordance with current governing authority.
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Fuel Shut-off valve
Figure 501
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THIS PAGE IS INTENTIONALLY LEFT BLANK
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