B. Equipment and Materials
(1)
Rig -Water Wash P&WA 33382 (Fig. 701) (Optional)
(2)
Probe -Water Wash P&WA 33594 (Fig. 703)
(3)
Water tank - approximately 250-U.S. gallon capacity, equipped with pump or a potable water source - 35- to 100-psi discharge pressure, with associated hose and nozzle with flow capacity of approximately 80 to 100 gal/min
(4)
Detergent -B&B 3100, B&B Tritech Inc., 875 W 20th St., Hialeah, FL. 33010; Ardrox 6343, Ardrox 6345, Ardrox/Leeder 352-L, or Turboclean 2, Brent Europe Ltd., Denbigh Road, Bletchley, Milton Keynes, United Kingdom MK1 1PB or Brent America Inc., 16961 Knott Ave, La Mirada, CA. 90638; Cee-Bee R-674, Cee-Bee Chemical Div., 9520 E Cee Bee Dr., Downey, CA. 90241; Penair M-5704, or Penetone 19A, Penetone Corp., 74 Hudson, Tenafly, NJ. 07670; Zok 27, Zok Inc., 8226 Kerr St., Houston, TX. 77029; or Turco 5884 or Turco 6783-3, Turco Products Inc., Westminster, CA. 90745
(5)
Preservative Oil -MIL-L-6081, Grade 1010
(6)
Solvent -Ethyl Alcohol (Denatured), AMS 3002 or O-A-396 (used during freezing conditions) (Ref. 20-30-31) (Fig. 702)
(7)
Solvent - Methyl Alcohol, AMS 3004 or O-M-232 (used during freezing conditions) (Ref. 20-30-31) (Fig. 702)
501
May 01/01 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 71-00 Page 701
C. Performance Check Procedure Operators may desire to obtain data, which reflects the performance improvement resulting from engine cleaning and/or establish an experience level on which to base future cleaning schedules. For such operators, it is recommended that the following performance check procedure be accomplished both prior to and after engine cleaning.
(1) Conduct engine performance check at 1.4 EPR, data plate EPR (1.65) and 1.8 EPR. At each point, operate engine for 5 minutes, then record N1, EGT, N2 and fuel flow. For this check, engine air bleed and electrical load extraction must be zero.
NOTE: During icing conditions, thermal anti-icing may be used between checkpoints.
Data comparison from performance checks together with engine service history records may be used to determine the specific performance improvement.
Compressor Water Wash Rig (Typical) 501
71-00 Figure 701 Aug 01/96
Page 702
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
D. Clean Engine - Water Wash Procedure
NOTE: A water wash is less harsh on the engine. Water washing is recommended unless the operater's operating environment is such that detergent is required to achieve adequate cleaning. Non-corrosive detergents (such as ZOK 27) should be considered first, before using a more corrosive type of detergent.
(1)
Conduct performance check (paragraph C) if desired.
(2)
Shut down engine and allow at least 30 minutes to elapse before washing engine.
(a) Disconnect and cap generator cooling inlet (aft) supply duct.
(3)
Deactivate ignition circuit breaker for engine being washed.
(4)
Check that start lever is in CUTOFF position.
(5)
Check that all anti-ice and fuel heater valves are in CLOSED position, except engine bleed valve.
(6)
Provide a handheld hose and nozzle, or attach water wash rig (P&WA 33382) to inlet guide vanes and connect supply hose (Fig. 701). If engine is to be cleaned during freezing temperature conditions, add sufficient alcohol to the wash water to ensure no ice forms that could cause damage to the engine. See Fig. 702 for recommended minimum water-alcohol mixtures. However, a mixture of up to 50% alcohol may be used.
WARNING: IF HOSE IS HANDHELD, OPERATOR MUST STAY AT LEAST 3 FEET FROM ENGINE INLET AT APPROXIMATELY WAIST-HIGH LEVEL OR BELOW.
CAUTION: SPRAYING WATER INTO GAS PATH BEFORE ENGINE HAS COOLED, CAN RESULT IN DAMAGE TO ENGINE PARTS DUE TO EXTREME THERMAL CYCLING.
(7)
Check that N2 rotation is completely stopped. Engage starter and allow engine to reach full starter rpm.
NOTE: Do not exceed starter limitations.
(8)
Spray clean tap water or water/alcohol mixture into the engine inlet for approximately 30 seconds while motoring the engine with the starter. Approximately 40 to 50 gallons of water may be discharged in the 30-second interval.
NOTES: Engine N2 speed will drop when water is first applied.
If hose is handheld, aim nozzle at the base of the blades on the right-hand side of the nose bullet facing aft.
501
May 01/03 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 71-00 Page 703
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