(b)
Incorporating P&WA SB 5425: 1) Bleed control Ps4 manifold. 2) Bleed control high pressure air sensing tube (Ps4). 3) Bleed control low pressure air supply tube (Ps3). 4) Bleed control low pressure air sensing tube (Pt2). 5) Bleed control Ps4 tube (to start bleed control valve).
B. Installation (Fig. 401, 402, 403)
(1) Using new packings and/or retainers as indicated, install following pressure ratio bleed control tubes:
(a) Prior to P&WA SB 5425: 1) Bleed control high pressure air supply tube connecting at top of engine to de-icing manifold and to bleed control. 2) Bleed control high pressure air sensing tube connecting at pad (2 o'clock position) on diffuser outer duct and to bleed control.
3) Bleed control low pressure air supply tube connecting to bleed control, using two new packings and two retainers. Connect other end of tube to strainer housing (at 10 o'clock position) on diffuser outer duct.
4) Bleed control low pressure air sensing tube, using two new packings and two retainers. Connect other end of tube to compressor inlet case (5 o'clock position).
5) Tighten nuts to recommended torque and lockwire. 6) Install clips and brackets on tubes.
(b) Incorporating P&WA SB 5425: 1) Bleed control Ps4 manifold, between de-icing air manifold and bleed control. Connect Ps4 tube leading to start bleed control valve to manifold.
2) Bleed control high pressure air sensing tube between diffuser outer duct pad (2 o'clock position) and bleed control.
500
Oct 20/83 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 75-31-11 Page 401
1.
Bleed Control High Pressure Air Sensing Tube
2.
Bleed Control High Pressure Air Supply Tube
3.
Bleed Control Low Pressure Air Sensing Tube
4.
Fuel Control Rear Ps4 Tube
5.
Bleed Control Low Pressure Air Supply Tube
6.
Pressure Ratio Bleed Control
Pressure Ratio Bleed Control and Tubing (Early Engines) 500
75-31-11 Figure 401 (Sheet 1) Oct 20/83
Page 402
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
500 Pressure Ratio Bleed Control
Oct 20/83 and Tubing (Prior to SB 5425) Figure 401 (Sheet 2) BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 75-31-11Page 403
Pressure Ratio Bleed Control 500
75-31-11 Page 404 and Tubing (Incorporating SB 5425) Figure 401 (Sheet 3) BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Oct 20/83
3) Bleed control low pressure air supply tube, using two new packings and retainers. Connect other end of tube to strainer housing (at 10 o'clock position) on diffuser outer duct.
4) Bleed control low pressure air sensing tube, using two new packings and retainers. Connect other end of tube to compressor inlet case (5 o'clock position).
3. Removal/Installation of the Pressure Ratio Bleed Control
A. Removal
(1)
Disconnect pressure ratio bleed control tubes at control (see step 2.a.).
(2)
Unfasten bolts (formerly locknuts) and remove pressure ratio bleed control from lower right side of engine.
B. Installation
(1)
Place pressure ratio bleed control on diffuser outer duct (5 o'clock position).
(2)
Secure assembly with four washers and bolts. Torque bolts.
NOTE: Use washers and locknuts for stud type installations.
(3)
Reconnect bleed control tubing and secure (see step 2.B.).
500
Oct 20/83 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 75-31-11 Page 405
H27063
Pressure Ratio Bleed Control Tube Installation 500
75-31-11Page 406 Figure 402 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. May 01/99
PRESSURE RATIO BLEED CONTROL METERING PLUG-REMOVAL/INSTALLATION
1. General
A. The procedure in this section pertains to the removal and installation of the pressure ratio bleed control metering plug located approximately 4 O'clock on the right side of engine.
2. Equipment and Material
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