H29501
500 Compressor Anti-Surge Bleed Valve Schedule
Oct 20/84 Figure 207 71-09-100
Page 227
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
11. Engine Oil Pressure Adjustment
A. Equipment and Materials
(1)
7/16-inch deep socket with external flats for engine oil pressure adjustment (Boeing tool SE72-6001,)
(2)
Oil Pressure Relief Valve Installation Tool -1-1/2-inch wrench
B. Adjust Engine Oil Pressure
(1)
On engines with ambient vented oil pressure transmitter system, if oil pressure adjustment is required because of high oil pressure indication, check oil breather pressure prior to adjusting engine oil pressure (Ref 79-21-0).
(2)
Operate engine at idle rpm for 5 minutes or until engine stabilizes.
(3)
Remove plug and packing from oil pressure relief valve, located on left side of accessory drive gearbox housing, while holding the hex fitting on the valve housing with 1-1/2-inch wrench (Fig. 208).
CAUTION: IF THE VALVE HOUSING IS REMOVED, OIL WILL DRAIN FROM THE TANK AND PRESSURE RELIEF VALVE PARTS WILL BE RELEASED AND WILL FALL TO THE GROUND.
(4)
Carefully loosen the adjusting screw locknut.
(5)
While the oil pressure indicator on the center panel is monitored, turn the adjusting screw with a screwdriver to obtain an oil pressure of 44 to 46 psig at idle rpm.
NOTE: Turn the adjusting screw clockwise to increase oil pressure and counterclockwise to decrease pressure. One full turn changes pressure by approximately 2 psig.
(6)
Tighten the locknut and recheck the oil pressure indicator.
NOTE: For consistent readings, hold the adjusting screw with a screwdriver while tightening the locknut. Tightening of the locknut will be facilitated if a deep socket with external flats is used (Boeing tool SE72-6001, or equivalent). The adjusting screw may then be held with a screwdriver while the deep socket is turned with a wrench.
(7)
Install the plug on the oil pressure relief valve using a new packing.
(8)
Shut down engine if no further adjustments are intended.
575
71-09-100 Page 228 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Feb 15/81
G42867
500 Engine Oil Pressure Adjustment
Aug 15/78 Figure 208 71-09-100
Page 229
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
12. Engine Shutdown Procedure
A. General
(1)
If the engine has been operated above 85% N2 rpm for more than one minute during the 5 minutes prior to shutdown, engine must be operated at idle rpm for an additional 5 minutes to ensure uniform cooling of engine parts.
(2)
The emergency engine shutdown procedure should only be used when abnormal conditions arise or to prevent damage to the engine. If an emergency shutdown is required when the engine is operating at high power settings, both compressor rotors should be checked for freedom of rotation when the engine has cooled.
(3)
To prevent reverse windmilling, guard against possible foreign object damage, and prevent engine icing due to rain and snow entering the engine, it is highly recommended that suitable inlet and exhaust covers be installed as soon as practical after engine shutdown.
B. Engine Shutdown
(1)
Normal engine shutdown.
(a)
Allow engine to stabilize at idle rpm for 5 minutes.
(b)
Move start lever to CUTOFF position and check that engine decelerates freely. Listen for any unusual rubbing or scraping noises on rundown.
(c)
Verify that both No. 1 and No. 2 engine LOW OIL PRESSURE lights are on.
WARNING: IF THE ENGINE LOW OIL PRESSURE LIGHT IS OFF, THE THRUST REVERSER FOR THE ENGINE CAN BE DEPLOYED WITHOUT THE ENGINE RUNNING.
(d)
Position fuel pump switches to OFF after the engine stops rotating.
(e)
When engine has cooled, install inlet and exhaust plugs.
(2)
Internal engine or tailpipe fire during shutdown.
(a)
Fully retard engine thrust lever and move start lever to CUTOFF in rapid succession.
CAUTION: DO NOT PLACE ENGINE START LEVER IN CUTOFF POSITION WITH ENGINE OPERATING IN THE HIGH RPM RANGE WITHOUT FIRST RETURNING THRUST LEVER TO FULLY RETARDED POSITION. INTERNAL DAMAGE TO THE FUEL CONTROL AND TURBINE WHEEL SEIZURE MAY OCCUR. 中國航空網 m.k6050.com 航空翻譯 www.aviation.cn 本文鏈接地址：737 AMM 飛機維護手冊 動力裝置 POWER PLANT(35)
