CARGO COMPARTMENT FIRE EXTINGUISHING BOTTLE - REMOVAL/INSTALLATION
EFFECTIVITY
737-200 Passenger Airplanes Incorporating SB 26A1081
1. General
A. A cargo fire extinguishing bottle is installed in the mix manifold bay, in the aft end of the forward cargo compartment.
B. This procedure has tasks to remove and install the cargo fire extinguishing bottle.
2. Remove Cargo Fire Extinguishing Bottle (Fig. 401)
A. Equipment
(1)
Squib Protective Cover
(a)
M83723/60-28-AN or AC (Fwd Squib)
(b)
M83723/60-210-AN or AC (Aft Squib)
(2)
Discharge Port Cap (Fwd Port = 1/2 inch, Aft Port - 5/8 inch) -
Supplied with the cargo fire bottle
B. References
(1)
Electrostatic Discharge Sensitive Devices - Maintenance Practices (AMM 20-40-12/201).
(2)
Manual Control - Maintenance Practices (Apply Power) (AMM 24-22-0/201).
(3)
Cargo Compartment Bulkhead Lining Remove/Installation (AMM 25-52-131/401).
C. Access
(1)
Location Zones
(a)
214 Mix Manifold Distribution Bay
(b)
213 Forward Cargo Compartment
(2)
Access Panels
4404R, Fwd Cargo Door
D. Prepare for Removal
(1)
Open this circuit breaker and attach a DO-NOT-CLOSE tag:
(a) Circuit Breaker Panel P6 or P18:
1) CARGO FIRE EXT 1
(2)
Open 4404R, Forward Cargo Door
(3)
Remove lining at the aft end of the forward cargo compartment to gain access to mix manifold bay (AMM 25-52-131/401).
(4)
If necessary, remove air conditioning duct in front of fire extinguishing bottle (AMM 21-21-11/401).
May 01/99 26-25-01 Page 401
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
K13262
Cargo Compartment Fire Extinguisher Bottle Installation 500
26-25-01 Figure 401 May 01/01
Page 402
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
WARNING: REFER TO AMM 20-40-12 BEFORE PROCEEDING WITH THE FOLLOWING STEPS. ELECTROSATIC DISCHARGE CAN CAUSE THE FIRE BOTTLE SQUIB TO FIRE AND RELEASE THE BOTTLE CONTENTS SUDDENLY, CAUSING INJURY TO PERSONNEL.
(5) Before touching squibs, perform procedure for devices that are sensitive to electrostatic discharge (AMM 20-40-12/201).
E. Remove Fire Extinguishing Bottle
(1) Disconnect the electrical connectors from the bottle.
(a)
Disconnect pressure switch connector D12792
(b)
Disconnect FWD Squib (M2249) connector D12794
(c)
Disconnect AFT Squib (M2250) connector D12796
WARNING: PUT A PROTECTIVE COVER ON THE FIRE BOTTLE SQUIB. FAILURE TO PUT A PROTECTIVE COVER ON THE FIRE BOTTLE SQUIB CAN CAUSE THE FIRE BOTTLE TO RELEASE ITS CONTENTS SUDDENLY AND CAUSE INJURY TO PERSONS.
CAUTION: DO NOT PUT A SHUNT PLUG ON THE FIRE BOTTLE SQUIB. THE SHUNT PLUG CAN CAUSE DAMAGE TO THE SQUIB CONNECTOR PINS.
(2)
Put a protective cover on FWD and AFT bottle squibs.
(3)
Remove nut to disconnect ground strap from bottle ground lug.
(4)
Disconnect the discharge tubes from the bottle discharge ports.
(5)
Install a cap on bottle discharge ports.
(6)
Install a cap on discharge tubes.
(7)
Remove bolts (three places) from support bracket.
(8)
Use service handles to remove cargo fire bottle.
3. Install Cargo Fire Extinguishing Bottle (Fig. 401)
A. Equipment
(1)
Voltmeter - with a 10k ohm or greater resistance
(2)
Ohmmeter - capable of measuring 0.0001 ohms
B. References
(1)
Electrostatic Sensitive Devices -Maintenance Practices (AMM 20-40-12/201).
(2)
Manual Control -Maintenance Practices (Apply Power) (AMM 24-22-0/201).
(3)
Cargo Compartment Bulkhead Lining Remove/Installation (AMM 25-52-131/401).
C. Consumables
(1)
C00913, Compound, Nondrying Resin Mix Corrosion Inhibiting Material - BMS 3-27
(2)
B00083, Solvent, Aliphatic Naphtha - TT-N-95
D. Access
(1)
Location Zones
214 Mix Manifold Bay
213 Forward Cargo Compartment
(2)
Access Panels
4404R, Forward Cargo Door
500
May 01/99 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 26-25-01 Page 403
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