S 016-107-N00

 (3)  
Open the core cowl panels (AMM 71-11-06/201).

 S 016-108-N00
 WARNING: OBEY THE INSTRUCTIONS IN AMM 78-31-00/201 WHEN YOU OPEN THE
_______
 THRUST REVERSERS. IF YOU DO NOT OBEY THE INSTRUCTIONS,
 INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.

 (4)  
Open the thrust reversers (AMM 78-31-00/201).

 F.  
Do the Volcanic Ash/Sand Ingestion Inspection/Check.

 S 026-109-N00
 (1)  
If the ash or sand ingestion caused engine operation problems, do
 the steps that follow.

 (a)  
Remove the engine (AMM 71-00-02/401).

 (b)  
Do these steps: disassemble, examine, and repair the engine.

 1)  Make sure the oil system, air supplied components, turbine cooling system, and fuel system operate correctly.

 (c)  
For engines operating under the requirements of PW SB 72-731, to avoid Fan Thrust Deterioration Mode (FTDM), recountour the fan blade leading edges using any of the procedures in PW SB 72-731.

 S 226-110-N00
 (2)  
If the ash or sand ingestion did not cause engine operation
 problems, do the steps that follow:

 (a)  
Visually examine the engine inlet and exhaust areas for signs of damage or too much erosion.

 (b)  
With a borescope, examine the high pressure compressor and the high pressure turbine for these conditions: too much erosion, FOD, cooling hole blockage in the high pressure turbine airfoils, and remaining ash or sand (AMM 72-00-00/601, borescope inspections).

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No. 9 - Volcanic Ash/Sand Ingestion Inspection/Check
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 (c)  Examine the magnetic chip detectors (MCDs) for signs of engine damage (AMM 79-21-10/601).
 NOTE: Keep the particles you find to do an analysis of them.
____ It is not necessary to install the master MCD at this time.
 (d)  Do an inspection on the magnetic plugs (chip detectors) and the oil: 1) Examine the magnetic plugs for contamination
 (AMM 79-21-10/601). 2) Do a spectroscopic analysis of the oil: a) With the magnetic plug removed from the oil tank, install a PWA 86018 Adapter at that location.
 1.  Get a sample of oil.
_
 b)  Do a spectroscopic analysis of the oil to find if there is engine damage (AMM 72-00-00/601, Oil Contamination Inspection).
 3)  If the oil is not satisfactory, flush the oil system (AMM 12-22-03/301). a) Do an analysis of the oil again (AMM 72-00-00/601, Oil
 Contamination Inspection). 4) Install the magnetic chip detector (AMM 79-21-10/401). 5) Remove the main oil filter and all of the last chance oil
 strainers (AMM 79-21-05/401, AMM 79-21-16/701). a) Examine them for contamination.
 NOTE: Keep the particles you find to do an analysis of
____
 them.

 b)  Clean or replace the main oil filter and the last chance oil strainers as necessary (AMM 79-21-05/401, AMM 79-21-16/401, AMM 79-21-16/701).
 (e)  Examine the fuel system for contamination.
 1)  Remove the fuel filter element (AMM 73-11-02/401). a) Examine the fuel filter element for contamination.
 NOTE: Keep the particles you find to do an analysis
____
 of them.

 b)  Clean or replace the fuel pump filter as it is necessary (AMM 73-11-02/401).
 2)  If the flight deck, fuel filter, or bypass light was on during or after ash or sand ingestion, do these steps: a) Remove the strainer for the fuel distribution valve
 (AMM 73-11-04/401).
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
No. 9 - Volcanic Ash/Sand Ingestion Inspection/Check
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