A
Bleed Bias Sensor Installation
Figure 401 (Sheet 1)
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
B
SEAL INSTALLED ON ENGINES WITH CFMI SB 72-319
Bleed Bias Sensor Installation
Figure 401 (Sheet 2)
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CFM56 ENGINES
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S 024-007-C00
(6) Remove the lower section of the 9th-stage duct.
(a) Keep the seals for the installation procedure.
S 034-009-C00
(7)
Remove the sensor from the HPC bleed port.
S 034-010-C00
(8)
Remove the flange gasket as follows:
(a)
Remove the sensor and flange gasket at the bleed port.
(b)
Remove and discard the C-seal from the flange gasket.
S 034-011-C00
(9) If you must replace the sensor, remove the nipple and seal from the sensor port.
NOTE: The seal is installed on the engine with CFMI SB 72-319.
____
(a) Discard the seal.
TASK 75-33-01-404-012-C00
3. Install the Bleed Bias Sensor
_____________________________
A. Equipment
(1) Lockwire
B. Consumable Materials
(1)
G01278 Scotch Brite - (CP2240) (AMM 70-10-01/201)
(2)
D00137 Oil - Engine, MIL-L-23699 (AMM 70-10-01/201)
C. References
(1) AMM 78-31-00/201, Thrust Reverser System
D. Access
(1)
Location Zones
506 Engine No. 1
606 Engine No. 2
(2)
Access Panels 5739L/5738L Engine No. 1 - Thrust Reverser Half 5839R/5838R Engine No. 2 - Thrust Reverser Half
E. Procedure (Fig. 401)
S 424-018-C00
(1) Install the Bleed Bias Sensor as follows:
(a) Put a new C-seal in the flange gasket.
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(b)
Make sure all mating surfaces are clean.
(c)
Put the flange gasket on the combustion case.
(d)
Make sure the holes of the gasket are aligned with the holes in the combustion case.
(e)
If a new sensor is used do the steps that follow:
1) ENGINES POST-CFMI-SB 72-319;
Put a new seal on the nipple.
WARNING:_______DO NOT LET ENGINE OIL STAY ON YOUR SKIN. USE ENGINE OIL IN AREA WITH GOOD VENTILATION. ENGINE OIL IS POISONOUS AND CAN BE ABSORBED THROUGH YOUR SKIN. ENGINE OIL FUMES CAN IRRITATE YOUR RESPIRATORY TRACT.
2) Lubricate the threads of the nipple (seal end) with engine
oil.
3) Install the nipple in the sensor port.
4) Tighten the nipple to 135-150 pound-inches
(15-17 Newton meters).
(f) Put the sensor on the combustion case with the CBP port pointed to the 6:00 o'clock position.
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