(c)
Remove the flexible shaft from the engine.
TASK 75-32-07-404-005-C00
3. Install the Flexible Shaft
__________________________
A. References
(1)
AMM 72-33-03/401, Fan Duct Panel
(2)
AMM 78-31-00/201, Thrust Reverser
B. 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 5737L/5746L Engine No. 1 - Fan Cowl Assembly 5837R/5846R Engine No. 2 - Fan Cowl Assembly
C. Procedure (Fig. 401)
S 424-006-C00
(1) Install the flexible shaft as follows:
(a)
Install and compress the spring, found in the hexagonal end of the shaft, into the ballscrew actuator.
(b)
Install the 8-point fitting at the opposite end of the shaft.
S 414-007-C00
(2)
Install the fan duct panel (AMM 72-33-03/401).
(3)
Close the thrust reverser half (AMM 78-31-00/201).
S 414-008-C00
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
BLEED BIAS SENSOR SYSTEM - DESCRIPTION AND OPERATION
____________________________________________________
1. General
_______
A. The bleed bias sensor system provides automatic resetting of the acceleration schedule to maintain rapid acceleration rates when bleed demands are high, and enables adequate stall margins to be observed when bleed demands are low. The system consists of a bleed bias sensor and connecting tubing to the main engine control (MEC).
2. Bleed Bias Sensor (Fig. 1)
_________________
A. The bleed bias sensor is a dual venturi device which senses compressor bleed pressure (CBP). The sensor is located in the 9th-stage ducting and is mounted between the 9th-stage ducting flange and the 9th-stage high pressure compressor (HPC) bleed port at the 4 o'clock position.
3. Operation
_________
A. The CBP from the bleed bias sensor, which is a function of the bleed rate, is transmitted by tubing to the MEC CBP sensor.
B. It imposes a bias on the compressor discharge pressure (CDP) sensor, which changes the CDP cam positioning to allow for higher acceleration rates and adequate stall margins depending on bleed demands.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
BLEED PORT COMPRESSOR (HPC) HIGH PRESSURE CASE COMBUSTION
SEE A A
A
FLANGE 9TH-STAGE DUCT 9TH-STAGE
SENSOR BIAS BLEED
B A
VENTURI EXIT VENTURI INNER
B
TO MEC (CBP) TUBING BLEED PRESSURE COMPRESSOR ____NOTE: NOT SHOWN FOR CLARITY. 9TH-STAGE DUCT FLANGE
A-A BLEED BIAS SENSOR B-B
Figure 1 Bleed Bias Sensor System Component Location
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
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