DOC AIRBUS | AMM A320FClean the Engine Gas Path for Performance Improvement (Water only) [IAE]
TASK 72-00-00-100-010-A
Clean the Engine Gas Path for Performance Improvement (Water only)
To clean the engine gas path for performance improvements or to remove debris because of birdstrike. It is recommended to use pure water only for the engine gas path cleaning.
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Referenced Information
3. Job Set-up
Subtask 72-00-00-941-092-A ** ON A/C NOT FOR ALL
Subtask 72-00-00-020-053-A ** ON A/C NOT FOR ALL
(2) Install a spray ring segment with a coupling that connects to the long hose around the bottom of the fan outlet inner vane assembly.
(3) Install the clamp screws on the brackets of the spray rings through the fan blade. Hang the hook of the clamp screw on the Low Pressure Compressor (LPC) outlet guide vane.
(4) Tighten the eight wing nuts on the clamp screws by hand.
(5) Connect the couplings of the spray rings, then safety the spray ring assembly to the fan outlet inner vane assembly with the clamp screws and the wing nuts. Adjust the positions of the spray ring assembly as necessary.
(6) Connect one end of the long hose to the spray ring assembly and the other end to a pressure pump for the WATER SOURCE - GROUND - 2.75 bar (40 psi) to 3.5 bar (51 psi).
(7) Safety the long hose to the common nozzle assembly with a clamp around the bottom of the common nozzle.
Subtask 72-00-00-420-073-A ** ON A/C NOT FOR ALL
Subtask 72-00-00-410-115-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 02:44:28 UTC
Clean the Engine Gas Path for Performance Improvement (Water only)
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
CAUTION:
DO NOT USE WATER TO WASH ENGINES WITH GAS PATHS THAT HAVE BEEN EXPOSED TO DRY POWDER FIRE EXTINGUISHING AGENTS. THESE AGENTS ARE NOT WATER SOLUBLE. IF YOU CLEAN WITH WATER, THESE MATERIALS WILL BOND TO ENGINE PARTS.
CAUTION:
TO PREVENT THE FORMATION OF ICE, MIX V01-007 OR V01-124 ALCOHOL WITH THE WATER YOU USE TO DILUTE THE CLEANER IF THE AMBIENT TEMPERATURE IS BETWEEN 40 DEG.F (4.4 DEG.C) AND 25 DEG.F (-3.9 DEG.C). DO NOT WASH BELOW TEMPERATURES OF 25 DEG.F (-3.9 DEG.C).
CAUTION:
THE ENGINE EGT MUST BE BELOW 150 DEG.F (65.6 DEG.C) TO PREVENT ENGINE DAMAGE.
1. Reason for the JobTo clean the engine gas path for performance improvements or to remove debris because of birdstrike. It is recommended to use pure water only for the engine gas path cleaning.
NOTE: This task can contribute to fuel savings and take off EGT margin recovery.
2. Job Set-up InformationA. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | PLUG - BLANKING |
| No specific | AR | SAFETY CLIP - CIRCUIT BREAKER |
| No specific | AR | WARNING NOTICE(S) |
| No specific | AR | WATER SOURCE - GROUND |
| No specific | Torque wrench: range to between 177 and 159 lbf.in (2.00 and 1.80 m.daN )  | |
| No specific | Torque wrench: range to between 310 and 283 lbf.in (3.50 and 3.20 m.daN ) | |
| IAE4J12031 | 1 | RING - SPRAY |
| IAE4J12034 | 1 | TUBE-WATER WASH |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.V01-007) | denatured ethyl alcohol |
| (Material No.V01-124) | Isopropyl Alcohol, Technical grade |
| (Material No.V02-274) | safety cable |
| No specific | MIL-L-23699 oil |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 210 | CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD |
| 400 | POWER PLANT, NACELLES AND PYLONS |
| FOR [1000EM1] (ENGINE-1) | |
| 437AL, 438AR, 451AL, 452AR | |
| FOR [1000EM2] (ENGINE-2) | |
| 447AL, 448AR, 461AL, 462AR | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 12-13-79-610-010-A | Drain the Engine Oil System |
| TASK 12-13-79-610-011-A | Check Oil Level and Replenish |
| TASK 71-00-00-700-013-A | Procedure to Dry Out the High Pressure Turbine (HPT) after Oil Contamination |
| TASK 71-00-00-710-013-C | Test No.11 : High Power Assurance Test |
| TASK 71-00-00-710-018-A | Discontinued Start, Restart and Shutdown Procedures |
| TASK 71-00-00-710-043-A | Normal Engine Automatic-Start Procedure |
| TASK 71-00-00-710-045-A | Test No.1 : Dry Motor Leak Check |
| TASK 71-00-00-710-047-A | Normal Engine Manual-Start Procedure |
| TASK 71-13-00-010-010-A | Opening of the Fan Cowls 437AL(447AL),438AR(448AR) |
| TASK 71-13-00-410-010-A | Closing of the Fan Cowls 437AL(447AL),438AR(448AR) |
| TASK 75-32-41-000-010-A | Removal of the Variable Stator Vane (VSV) Actuator |
| TASK 75-32-41-400-010-A | Installation of the Variable Stator Vane (VSV) Actuator |
| TASK 75-32-41-400-010-A-01 | Installation of the Variable Stator Vane (VSV) Actuator (SBE 75-0122, Type G4000VSVA Series) |
| TASK 77-21-43-350-801-A | EGT Harness Dry-Out Procedure |
| TASK 78-30-00-040-012-A | Deactivation of the Thrust Reverser Hydraulic Control Unit (HCU) for Ground Maintenance |
| TASK 78-30-00-440-012-A | Re-activation of the Thrust Reverser Hydraulic Control Unit (HCU) after Ground Maintenance |
| TASK 78-32-00-010-010-A | Opening of the Thrust Reverser Halves |
| TASK 78-32-00-410-010-A | Closing of the Thrust Reverser Halves |
P4.9 Air Tube AssemblySubtask 72-00-00-941-092-A ** ON A/C NOT FOR ALL
A. Safety Precautions
(1) On the center pedestal, on ENG panel 115VU:
(a) Put the WARNING NOTICE(S) in position to tell persons not to start the engine.
(2) Make sure that the engine shutdown occurred five minutes or more before you do this procedure.
(3) On overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put the WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).
(4) On AIR COND panel 30VU:
(a) Make sure that the OFF legend of the ENG 1(2) BLEED pushbutton switch is on.
(b) Make sure that the OFF legends of the PACK 1 and PACK 2 pushbutton switches are on.
Subtask 72-00-00-010-115-A ** ON A/C NOT FOR ALL (1) On the center pedestal, on ENG panel 115VU:
(a) Put the WARNING NOTICE(S) in position to tell persons not to start the engine.
(2) Make sure that the engine shutdown occurred five minutes or more before you do this procedure.
(3) On overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put the WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).
(4) On AIR COND panel 30VU:
(a) Make sure that the OFF legend of the ENG 1(2) BLEED pushbutton switch is on.
(b) Make sure that the OFF legends of the PACK 1 and PACK 2 pushbutton switches are on.
B. Open the fan cowls (Ref. AMM TASK 71-13-00-010-010):
(1) FOR [1000EM1] (ENGINE-1)
437AL, 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL, 448AR.
Subtask 72-00-00-040-070-A ** ON A/C NOT FOR ALL Subtask 72-00-00-010-116-A ** ON A/C NOT FOR ALL (1) FOR [1000EM1] (ENGINE-1)
437AL, 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL, 448AR.
D. Open the thrust reverser halves (Ref. AMM TASK 78-32-00-010-010):
(1) FOR [1000EM1] (ENGINE-1)
451AL, 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL, 462AR.
4. Procedure(1) FOR [1000EM1] (ENGINE-1)
451AL, 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL, 462AR.
Subtask 72-00-00-020-053-A ** ON A/C NOT FOR ALL
A. Disconnect the following air tubes:
(1) Make sure that all the disconnected tubes are capped properly to prevent water/foreign object intrusion.
(2) Disconnect the P4.9 air sense tube to the Electronic Engine Control (EEC) from the fitting at the bottom of the turbine exhaust case. Install the PLUG - BLANKING on the disconnected air tube end.
(3) Disconnect the Pb (PS3) sensing air tube from the auto start probe. Install the PLUG - BLANKING on the disconnected air tube end.
PRE SBE 75-0081
(4) Disconnect the stage 12 (P3) make-up air valve muscle air tube from the off-take tube before you do the core wash. Install the PLUG - BLANKING on the disconnected air tube end.
END OF PRE SBE 75-0081
Subtask 72-00-00-420-057-A ** ON A/C NOT FOR ALL (1) Make sure that all the disconnected tubes are capped properly to prevent water/foreign object intrusion.
(2) Disconnect the P4.9 air sense tube to the Electronic Engine Control (EEC) from the fitting at the bottom of the turbine exhaust case. Install the PLUG - BLANKING on the disconnected air tube end.
(3) Disconnect the Pb (PS3) sensing air tube from the auto start probe. Install the PLUG - BLANKING on the disconnected air tube end.
PRE SBE 75-0081
(4) Disconnect the stage 12 (P3) make-up air valve muscle air tube from the off-take tube before you do the core wash. Install the PLUG - BLANKING on the disconnected air tube end.
END OF PRE SBE 75-0081
NOTE: The disconnection of the Variable Stator Vane (VSV) actuator and the manual opening of the stator vanes are optional. An additional core wash cycle can be done to compensate the core wash efficiency reduction due to a closed VSV during the core wash.
(5) Disconnect the VSV control rod from the actuator and manually move the stator vanes to the fully open position, and install the rig pin (Ref. AMM TASK 75-32-41-000-010). NOTE: Disconnecting and reconnecting the VSV actuator requires a high-power assurance run.
NOTE: Refer to the applicable equipment operations manual and procedure for the correct equipment steps.
CAUTION:
WHEN YOU PUT THE SPRAY RING SEGMENTS THROUGH THE FAN BLADES, MAKE SURE THAT THE SPRAY RING SEGMENTS DO NOT TOUCH THE ENGINE PARTS THAT MOVE.
IF YOU DO NOT OBEY THIS INSTRUCTION, DAMAGE TO THE EQUIPMENT CAN OCCUR.
B. Install the IAE4J12031 RING - SPRAY: NOTE: This subtask is an alternative to subtask 72-00-00-420-073-A.
(1) Put each of the four spray ring segments (nozzle hole side to the rear) at the inlet of the fan outlet inner vane assembly through the fan blades. (2) Install a spray ring segment with a coupling that connects to the long hose around the bottom of the fan outlet inner vane assembly.
(3) Install the clamp screws on the brackets of the spray rings through the fan blade. Hang the hook of the clamp screw on the Low Pressure Compressor (LPC) outlet guide vane.
(4) Tighten the eight wing nuts on the clamp screws by hand.
(5) Connect the couplings of the spray rings, then safety the spray ring assembly to the fan outlet inner vane assembly with the clamp screws and the wing nuts. Adjust the positions of the spray ring assembly as necessary.
(6) Connect one end of the long hose to the spray ring assembly and the other end to a pressure pump for the WATER SOURCE - GROUND - 2.75 bar (40 psi) to 3.5 bar (51 psi).
(7) Safety the long hose to the common nozzle assembly with a clamp around the bottom of the common nozzle.
C. Install the IAE4J12034 TUBE-WATER WASH as follows:
(2) Let the grooves in the clamps touch the strut edges and safety the clamps with the two long bolts and wing nuts.
(3) Put the tube between the No. 7 and No. 8 struts from the rear in parallel to the engine centerline, then let it go through between the fan exit guide vanes carefully so that the tube does not touch the vanes.
(4) Set the square end of the tube to the aft clamps. Make sure that the front bent part of the tube does not touch the trailing edges of the fan blades. If necessary, install the spacer(s) between the aft clamps and the square end.
(5) Put the tube nozzle between the leading edges of the inlet guide vanes.
(6) Hold the tube with the thicker clamps and the thinner wooden clamps and safety them with the four short bolts and wing nuts.
(7) Make sure again that the front bent part of the tube does not touch the trailing edges of the fan blades, that the tube nozzle does not touch the inlet guide vanes and the direction of the tube nozzle is at a correct angle.
(8) If necessary, use spacers to adjust the positions of the clamps and the angle of the tube correctly.
(9) Safety the clamps tightly with the wing nuts.
(10) Connect a potable water or potable water/alcohol mix source with a pressure of 40 to 50 psi (275 to 345 kPa) to the tube.
Subtask 72-00-00-612-050-A ** ON A/C NOT FOR ALL Subtask 72-00-00-865-050-A ** ON A/C NOT FOR ALL NOTE: This subtask is an alternative to Subtask 72-00-00-420-057-A.
(1) Put the two thicker wooden clamps on the front and aft sides of the No. 7 and No. 8 struts. (2) Let the grooves in the clamps touch the strut edges and safety the clamps with the two long bolts and wing nuts.
(3) Put the tube between the No. 7 and No. 8 struts from the rear in parallel to the engine centerline, then let it go through between the fan exit guide vanes carefully so that the tube does not touch the vanes.
(4) Set the square end of the tube to the aft clamps. Make sure that the front bent part of the tube does not touch the trailing edges of the fan blades. If necessary, install the spacer(s) between the aft clamps and the square end.
(5) Put the tube nozzle between the leading edges of the inlet guide vanes.
(6) Hold the tube with the thicker clamps and the thinner wooden clamps and safety them with the four short bolts and wing nuts.
(7) Make sure again that the front bent part of the tube does not touch the trailing edges of the fan blades, that the tube nozzle does not touch the inlet guide vanes and the direction of the tube nozzle is at a correct angle.
(8) If necessary, use spacers to adjust the positions of the clamps and the angle of the tube correctly.
(9) Safety the clamps tightly with the wing nuts.
(10) Connect a potable water or potable water/alcohol mix source with a pressure of 40 to 50 psi (275 to 345 kPa) to the tube.
E. Open, safety and tag this(these) circuit breaker(s):
Subtask 72-00-00-110-066-A ** ON A/C NOT FOR ALL | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | ENGINE/1 AND 2/IGN/SYS A | 1JH | A03 |
| FOR FIN: 1000EM1 (ENGINE1) | |||
| 121VU | ENGINE/IGN/ENG1/SYS B | 3JH1 | P41 |
| 121VU | ENGINE/IGN/ENG1/SYS A BAT | 2JH1 | P39 |
| FOR FIN: 1000EM2 (ENGINE2) | |||
| 121VU | ENGINE/IGN/ENG2/SYS B | 3JH2 | P42 |
| 121VU | ENGINE/IGN/ENG2/SYS A BAT | 2JH2 | P40 |
F. Clean the compressor:
(1) Prepare between 50 and 60 gallons (190 and 230 liters) of potable water or potable water/alcohol mix.
Table 1 - Potable Water Quality Specifications
(b) If the outside temperature is 41.9 deg.F (5.5 deg.C) or less, use water mixed with denatured ethyl alcohol (Material No.V01-007) or V01-124 Isopropyl Alcohol, Technical grade
(2) Make sure that you do not operate the starter more than five minutes cumulative.
(b) Between the cycles, there must be a period of 15 seconds minimum when the N2 speed is zero (0) rpm to allow for the starter rotor lubrication.
(c) After the three cycles, let the starter cool for 30 minutes before you try motoring again.
(d) Do not engage the starter again with the engine motoring above 10 percent N2.
(3) Do the following water wash procedure:
(a) Motor the engine with the starter until a minimum of 14 percent N2 is reached (Ref. AMM TASK 71-00-00-710-045).
(b) While you continue to motor the engine at a minimum of 14 percent N2, spray between 10 and 15 gallons (40 and 60 liters) of potable water or potable water/alcohol mix in two minutes into the low pressure compressor.
(c) Stop motoring the engine, and let it soak for a minimum of 10 minutes.
(d) After a minimum soaking time of 10 minutes, motor the engine with the starter until a minimum of 14 percent N2 is reached (Ref. AMM TASK 71-00-00-710-045).
(e) While you continue to motor the engine at a minimum of 14 percent N2, spray between 10 and 15 gallons (40 and 60 liters) of potable water or potable water/alcohol mix in two minutes into the low pressure compressor.
(f) Stop motoring the engine, and let it soak for a minimum of 10 minutes.
(g) After a minimum soaking time of 10 minutes, dry motor the engine with the starter at a minimum of 14 percent N2 (Ref. AMM TASK 71-00-00-710-045).
(h) If necessary, do Para. (3) again. Make sure that you let the starter cool for 30 minutes before you try motoring again.
Subtask 72-00-00-420-058-A ** ON A/C NOT FOR ALL (1) Prepare between 50 and 60 gallons (190 and 230 liters) of potable water or potable water/alcohol mix.
NOTE: Volumes are given for reference only. It is permitted to use different volumes.
(a) The water for the engine gaspath cleaning must agree with the local quality specifications for potable water and with these quality specifications: NOTE: When the local quality specifications for potable water and the quality specifications that follow do not agree, the quality specifications that follow are applicable.
Table 1 - Potable Water Quality Specifications
| PROPERTY | PERMITTED LEVELS (ANALYSIS AT 75°F (24°C)) |
|---|---|
| pH | 6.0-10.0 |
| Total dissolved solids | 500 milligrams/liter maximum |
| Resistance or conductivity: | |
| Specific resistance | 1800 ohm-centimeters minimum |
| Conductivity | 550 microsimens/centimeter maximum |
| Chloride | 250 milligrams/liter maximum |
| Fluoride | 2.0 milligrams/liter maximum |
(2) Make sure that you do not operate the starter more than five minutes cumulative.
CAUTION:
DO NOT MOTOR THE ENGINE MORE THAN THE LIMIT OR YOU CAN CAUSE DAMAGE TO THE STARTER (NOT CONTROLLED BY THE EEC).
(a) Three cycles: Two cycles with a maximum duration of two minutes for each cycle and one cycle maximum duration of one minute. (b) Between the cycles, there must be a period of 15 seconds minimum when the N2 speed is zero (0) rpm to allow for the starter rotor lubrication.
(c) After the three cycles, let the starter cool for 30 minutes before you try motoring again.
(d) Do not engage the starter again with the engine motoring above 10 percent N2.
(3) Do the following water wash procedure:
(a) Motor the engine with the starter until a minimum of 14 percent N2 is reached (Ref. AMM TASK 71-00-00-710-045).
(b) While you continue to motor the engine at a minimum of 14 percent N2, spray between 10 and 15 gallons (40 and 60 liters) of potable water or potable water/alcohol mix in two minutes into the low pressure compressor.
(c) Stop motoring the engine, and let it soak for a minimum of 10 minutes.
(d) After a minimum soaking time of 10 minutes, motor the engine with the starter until a minimum of 14 percent N2 is reached (Ref. AMM TASK 71-00-00-710-045).
(e) While you continue to motor the engine at a minimum of 14 percent N2, spray between 10 and 15 gallons (40 and 60 liters) of potable water or potable water/alcohol mix in two minutes into the low pressure compressor.
(f) Stop motoring the engine, and let it soak for a minimum of 10 minutes.
(g) After a minimum soaking time of 10 minutes, dry motor the engine with the starter at a minimum of 14 percent N2 (Ref. AMM TASK 71-00-00-710-045).
(h) If necessary, do Para. (3) again. Make sure that you let the starter cool for 30 minutes before you try motoring again.
NOTE: If the wash fluid flow from the tail pipe is dirty, an added gaspath wash will help. Multiple gaspath washes are allowed to get a better or clear outflow.
G. Connect the tubes and the VSV actuator:
(a) TORQUE the tube connector to between 177 and 159 lbf.in (2.00 and 1.80 m.daN ):
1 Safety with the safety cable (Material No.V02-274) .
(2) Remove the PLUG - BLANKING and connect the PB (PS3) sensing tube to the auto start probe.
(a) TORQUE the tube connector to between 177 and 159 lbf.in (2.00 and 1.80 m.daN ):
1 Safety with the safety cable (Material No.V02-274) .
PRE SBE 75-0081
(3) Remove the PLUG - BLANKING and connect the stage 12 (P3) air tube to the off-take tube.
(a) TORQUE the tube connector to between 310 and 283 lbf.in (3.50 and 3.20 m.daN ):
1 Safety with the safety cable (Material No.V02-274) .
END OF PRE SBE 75-0081
Subtask 72-00-00-865-051-A ** ON A/C NOT FOR ALL WARNING:
USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.
(1) Remove the PLUG - BLANKING and connect the P4.9 tube to the fitting at the bottom of the turbine exhaust case. (a) TORQUE the tube connector to between 177 and 159 lbf.in (2.00 and 1.80 m.daN )
:1 Safety with the safety cable (Material No.V02-274) .
(2) Remove the PLUG - BLANKING and connect the PB (PS3) sensing tube to the auto start probe.
(a) TORQUE the tube connector to between 177 and 159 lbf.in (2.00 and 1.80 m.daN )
:1 Safety with the safety cable (Material No.V02-274) .
PRE SBE 75-0081
(3) Remove the PLUG - BLANKING and connect the stage 12 (P3) air tube to the off-take tube.
(a) TORQUE the tube connector to between 310 and 283 lbf.in (3.50 and 3.20 m.daN )
: 1 Safety with the safety cable (Material No.V02-274) .
END OF PRE SBE 75-0081
CAUTION:
YOU MUST MAKE SURE THAT THE BOLT IS CORRECTLY INSTALLED TO THE VSV ACTUATOR FORK. IF YOU DO NOT DO THIS, EXTENSIVE DAMAGE TO THE ENGINE CAN OCCUR.
(4) If the Variable Stator Vane (VSV) actuator was disconnected before you do the rinsing, remove the rig pin, move the stator vanes to the closed position and connect the VSV control rod to the actuator (Ref. AMM TASK 75-32-41-400-010). NOTE: Disconnecting and reconnecting the VSV actuator requires a high-power assurance run.
(5) Remove the spray ring or the water wash tube. H. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 72-00-00-100-051-A ** ON A/C NOT FOR ALL 5. Close-up| PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | ENGINE/1 AND 2/IGN/SYS A | 1JH | A03 |
| FOR FIN: 1000EM1 (ENGINE1) | |||
| 121VU | ENGINE/IGN/ENG1/SYS B | 3JH1 | P41 |
| 121VU | ENGINE/IGN/ENG1/SYS A BAT | 2JH1 | P39 |
| FOR FIN: 1000EM2 (ENGINE2) | |||
| 121VU | ENGINE/IGN/ENG2/SYS B | 3JH2 | P42 |
| 121VU | ENGINE/IGN/ENG2/SYS A BAT | 2JH2 | P40 |
Subtask 72-00-00-410-115-A ** ON A/C NOT FOR ALL
A. Close the thrust reverser halves (Ref. AMM TASK 78-32-00-410-010):
(1) FOR [1000EM1] (ENGINE-1)
451AL, 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL, 462AR.
Subtask 72-00-00-440-071-A ** ON A/C NOT FOR ALL Subtask 72-00-00-410-117-A ** ON A/C NOT FOR ALL (1) FOR [1000EM1] (ENGINE-1)
451AL, 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL, 462AR.
C. Close Access
(1) Close the fan cowls (Ref. AMM TASK 71-13-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL, 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL, 448AR.
(2) Remove the WARNING NOTICE(S).
Subtask 72-00-00-700-050-A ** ON A/C NOT FOR ALL (1) Close the fan cowls (Ref. AMM TASK 71-13-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL, 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL, 448AR.
(2) Remove the WARNING NOTICE(S).
D. Dry Out the High Pressure Turbine
(1) Do the dry out procedure for the HPT (Ref. AMM TASK 71-00-00-700-013).
Subtask 72-00-00-710-053-A ** ON A/C NOT FOR ALL (1) Do the dry out procedure for the HPT (Ref. AMM TASK 71-00-00-700-013).
E. Post High Pressure (HP) Compressor Wash and Oil Sampling
(2) If a high power assurance run (Ref. AMM TASK 71-00-00-710-013) is done in less than 12 hours, no more action is necessary.
(3) If the engine is not going back to service in less than 12 hours, do the following:
(a) Do a visual check of the engine oil tank sight glass for contamination.
1 Look at the oil through the oil tank sight glass. If the oil is emulsified (has a white color), drain the engine oil system (Ref. AMM TASK 12-13-79-610-010) and fill the system with new oil (Ref. AMM TASK 12-13-79-610-011) immediately.
(b) If the visual check was satisfactory, do a check for water content of the oil as follows.
1 Option 1:
a Take a sample of 4 oz (113.40 g) oil from the engine. The oil sample must be taken for analysis as soon as possible but not exceeding the 12 hours time interval.
b Do a Karl Fisher titration ASTMD-6304-04ae1 water analysis to find the water content of the oil.
2 Option 2:
b Reinstall the main oil tank filler cap and make sure that it is properly locked in position.
c For the thin film capacitive polymer oil water content tester, set the thin film capacitive polymer oil water content tester to MIL-L-23699 oil.
d Stir the probe in the oil until the unit has reached the steady state level of water concentration for 20 seconds. This normally takes at least two minutes of stirring to complete.
(4) The results of the above tests in option 1 and 2 should be analyzed further as follows:
(a) If the water content is less than 1000 parts per million (ppm) by weight or by volume, the engine can sit not more than a maximum of 24 hours before next engine run-up.
(b) If the water content is more than 1000 parts per million (ppm) by weight or by volume, remove the water content from oil. Do the steps that follow:
1 Do the engine ground run to remove the water content from the oil.
a Start the engine (Ref. AMM TASK 71-00-00-710-043) or (Ref. AMM TASK 71-00-00-710-047).
c On AIR COND panel 30VU, push the ENG 1(2) BLEED pushbutton switch to ON.
d Make sure that the OFF legend goes off when the engine bleed system operates.
e Toggle the anti icing control valve ON/OFF by pressing the anti ice selector switch ENG 1(2) from the flight deck overhead panel.
g Do an engine shutdown (Ref. AMM TASK 71-00-00-710-018).
h If you do not get the minimum oil temperature, do one of the procedures that follow:
Option 1: Do a high power assurance run immediately (Ref. AMM TASK 71-00-00-710-013). After successful completion of the high power assurance run, no more action is necessary.
Option 2: Drain the engine oil system (Ref. AMM TASK 12-13-79-610-010) and fill the system with new oil (Ref. AMM TASK 12-13-79-610-011).
NOTE: IAE recommends to run the engine as soon as possible post HP compressor wash. However, it is possible for the engine to sit up to 24 hours based on the water oil content after the HP compressor wash, before the engine run.
NOTE: The test results from the water content of the oil must be available in 12 hours after the core wash if no engine operation is scheduled in less than 12 hours.
(1) If the engine is sent back to service in less than 12 hours, no more action is required. (2) If a high power assurance run (Ref. AMM TASK 71-00-00-710-013) is done in less than 12 hours, no more action is necessary.
(3) If the engine is not going back to service in less than 12 hours, do the following:
(a) Do a visual check of the engine oil tank sight glass for contamination.
1 Look at the oil through the oil tank sight glass. If the oil is emulsified (has a white color), drain the engine oil system (Ref. AMM TASK 12-13-79-610-010) and fill the system with new oil (Ref. AMM TASK 12-13-79-610-011) immediately.
(b) If the visual check was satisfactory, do a check for water content of the oil as follows.
1 Option 1:
a Take a sample of 4 oz (113.40 g) oil from the engine. The oil sample must be taken for analysis as soon as possible but not exceeding the 12 hours time interval.
b Do a Karl Fisher titration ASTMD-6304-04ae1 water analysis to find the water content of the oil.
2 Option 2:
CAUTION:
MAKE SURE THERE IS NO CONTAMINATION FROM AN EXTERNAL WATER SOURCE. ONE DROP OF WATER WILL CAUSE THE SAMPLE TO READ OVER THE LIMITS.
a Use a new clear BOTTLE - SAMPLE to collect approximately a 0.0159 USgal (0.06 l) sample of oil for the thin film capacitive polymer oil water content tester test. It is permissible to insert the thin film capacitive polymer oil water content tester directly into the main oil tank fill. b Reinstall the main oil tank filler cap and make sure that it is properly locked in position.
c For the thin film capacitive polymer oil water content tester, set the thin film capacitive polymer oil water content tester to MIL-L-23699 oil.
d Stir the probe in the oil until the unit has reached the steady state level of water concentration for 20 seconds. This normally takes at least two minutes of stirring to complete.
(4) The results of the above tests in option 1 and 2 should be analyzed further as follows:
(a) If the water content is less than 1000 parts per million (ppm) by weight or by volume, the engine can sit not more than a maximum of 24 hours before next engine run-up.
(b) If the water content is more than 1000 parts per million (ppm) by weight or by volume, remove the water content from oil. Do the steps that follow:
1 Do the engine ground run to remove the water content from the oil.
a Start the engine (Ref. AMM TASK 71-00-00-710-043) or (Ref. AMM TASK 71-00-00-710-047).
NOTE: Do not operate engine bleed before finishing the next step, otherwise the air-conditioning system can become contaminated.
NOTE: If the engine ground run at idle power is successful, a further engine ground run will be required to functionally check the air conditioning packs. This can be done at operator convenience.
b Operate the engine at idle to bring the engine oil temperature to a minimum of 220 deg.F (104.44 deg.C) for no less than 10 minutes once the quoted oil temperature has been achieved. c On AIR COND panel 30VU, push the ENG 1(2) BLEED pushbutton switch to ON.
d Make sure that the OFF legend goes off when the engine bleed system operates.
e Toggle the anti icing control valve ON/OFF by pressing the anti ice selector switch ENG 1(2) from the flight deck overhead panel.
NOTE: The selector switch will have the ON indicator illuminating in blue color.
f Keep the valve open (ON) while engine running in idle. Shut-off valve (OFF) before the engine shutdown. g Do an engine shutdown (Ref. AMM TASK 71-00-00-710-018).
h If you do not get the minimum oil temperature, do one of the procedures that follow:
Option 1: Do a high power assurance run immediately (Ref. AMM TASK 71-00-00-710-013). After successful completion of the high power assurance run, no more action is necessary.
Option 2: Drain the engine oil system (Ref. AMM TASK 12-13-79-610-010) and fill the system with new oil (Ref. AMM TASK 12-13-79-610-011).