Engine and Nose Cowl Anti-Icing Circuit 5E5
75-11-0 Figure 2 Feb 20/87
Page 4
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
ANTI-ICING AIR SYSTEM - REMOVAL/INSTALLATION
P&W 75-10, Page 402, Jan 01/87
1. Removal/Installation of the Anti-Icing Air System (Fig. 401)
A. General
(1) The anti-icing air system is composed of two assemblies located on the left and right sides of the engine. The tubes extend from elbows located on the sides of the rear compressor outer duce to elbows located at the upper quadrants of the inlet case. Replacement procedure is the same for either side.
NOTE: These procedures are also applicable to anti-icing tubes used with the respaced inlet configuration (RIGV) P&W post-SB 5948.
B. Removal
(1)
Establish clamp locations to facilitate installation.
(2)
Disconnect electrical lead to anti-icing air shutoff valve.
(3)
Remove clips, then unfasten bolts at inlet case elbow.
(4)
Remove three nuts and remove elbow from inlet case.
(5)
Remove front anti-icing tube.
(6)
On airplanes with anti-icing valve support, remove nuts and bolts holding valve support to front compressor case.
(7)
On airplanes with anti-icing valve support, unfasten bolts from front flange of anti-icing air shutoff valve and remove support.
(8)
On airplanes with tube sealing sleeve, remove the nuts and bolts that attach the half clamp to the sealing sleeve.
(9)
On airplanes with tube sealing sleeve, remove the bolts, nuts, and the washers that attach the sealing sleeve to the anti-icing valve.
(10)
Unfasten bolts at valve assembly rear flange and remove valve and actuator.
(11)
Unfasten bolts securing rear anti-icing air tube to rear compressor outer duct and remove tube.
505 Anti-Icing Air Tubing
May 01/00 Figure 401 75-11-0
Page 401
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
C. Installation
(1)
Assemble air valve to rear tube with four bolts. Tighten bolts to recommended torque and lockwire.
(2)
Install assembled rear tube and valve on engine, using new gasket on rear compressor outer duct boss. Fasten rear tube to boss with four washers and bolts. Tighten bolts to recommended torque and lockwire.
(3)
On airplane with anti-icing valve support, fasten valve support to front flange of valve with four bolts, washers, and locknuts. Tighten locknuts to recommended torque.
(4)
On airplanes with anti-icing valve support, secure support to front compressor case with two spacers, four washer, two bolts, and two locknuts.
(5)
On airplanes with tube sealing sleeve, attach the sealing sleeve to the front flange of the anti-icing valve with the bolts, washers, and the locknuts. Tighten the locknuts.
(6)
On airplanes with tube sealing sleeve, attach the half clamp on the sealing sleeve to the brackets on the engine flange with the bolts and locknuts. Tighten the locknuts.
(7)
Insert front anti-icing tube into flange.
(8)
Secure inlet case elbow to front tube with two bolts, four washers, and two locknuts. Tighten nuts to recommended torque.
(9)
Secure elbow to inlet case using new gasket, three washers and locknuts. Tighten locknuts to recommended torque.
(10)
Secure front tube with clip.
(11)
Connect electrical lead to air valve.
(12)
Perform operational check of air valve during next engine operation.
500
75-11-0 Page 402 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Oct 20/90
ENGINE AND NOSE COWL ANTI-ICING SYSTEM - ADJUSTMENT/TEST
1. Engine and Nose Cowl Anti-Icing System Test
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