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757 MAINTENANCE MANUAL
(b)
Make sure all the end caps are removed.
(c)
Start purging air from the open end tube assembly near the smoke detectors location.
NOTE: It is also acceptable to blow air from either or both
____ open ends of the tubing system, the end caps, or tee tubing connections.
S 757-022
(9)
Do the procedure again if it is necessary to make sure the tubing is clean.
S 757-023
(10)
Make sure the air sampling tubes, tee tubing splices, orifices, end caps, straps, and clamps are not damaged. Replace them if it is necessary.
G. Smoke Detector Tubes Cleaning - Method 2
S 037-025
(1)
Remove the rubber tubes which attach the tube assemblies to the smoke detectors.
S 757-026
(2)
Examine the air sampling orifices and rubber sleeves at orifices for contamination and debris.
S 107-053
CAUTION:_______AIR SAMPLING ORIFICE DIAMETERS HAVE CRITICAL DIMENSIONS. DO NOT INSERT ANY CLEANING DEVICES WHICH MAY ALTER THE DIMENSIONS OF THE ORIFICE.
(3) Remove the contamination and debris from the rubber sleeves and orifices if it is necessary.
S 167-028
CAUTION:_______USE A VACUUM OF NO LESS THAN 15 INCHES OF WATER. IF NOT, THIS CAN CAUSE DAMAGE TO THE EQUIPMENT.
(4) Apply a vacuum of no less than 15 inches of water (0.5 psi) or greater than 140 inches of water (5 psi) to the end of the tubes which connects to the detector assemblies.
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H. Put the Airplane Back to Its Usual Condition.
S 437-058
(1)
Assemble the smoke detector tubing.
S 437-057
(2)
Install the smoke detector assembly (AMM 26-16-01/201).
S 437-059
(3)
Install the applicable cargo lining panels (AMM 25-50-03/401).
S 717-056
(4)
Do a Test of the Smoke Detector Installation (AMM 26-16-01/201).
S 027-060
(5)
Close main cargo doors (AMM 52-34-00/201).
S 717-055
(6)
Do the Operational Test and the Vacuum Test for the applicable Cargo Smoke Detection System (AMM 26-16-00/501).
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CARGO SMOKE DETECTORS - MAINTENANCE PRACTICES
_____________________________________________
1. General_______
A. This section contains these procedures for the cargo smoke detectors:
(1)
Remove the Smoke Detector
(2)
Install the Smoke Detector
B. The smoke detectors in the forward cargo compartment are M10458 and M10459. They are installed in the ceiling of the forward cargo compartment just aft of the No. 1 cargo door. Get access to the forward detectors through the ceiling panel. The smoke detectors in the aft cargo compartment are M10460 and M10461. They are installed in the aft cargo compartment sidewall just forward of No. 2 cargo door. Get access to the aft detectors through the sidewall panel.
TASK 26-16-01-022-001
2. Remove the Cargo Smoke Detector (Fig. 201)_______________________________
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