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 (d) (e)  Examine the Ram Air Inlet Deflectors (AMM 21-52-21/401). 1) If you find volcanic ash in the deflectors, clean the deflectors and movable joints.Examine the Ram Air Inlet Deflector Shaft Assemblies (AMM 21-52-31/401). 1) If you find volcanic ash in the shaft assemblies, clean the shaft assemblies.
 (f) (g)  Examine the Ram Air Inlet Modulation Panels (AMM 21-52-41/401). 1) If you find volcanic ash in the modulation panels, clean the panels and movable joints.Examine the Ram Air Inlet Modulation Panel Shaft Assemblies (AMM 21-52-51/401). 1) If you find volcanic ash in the shaft assemblies, clean the shaft assemblies.
 (h) (i) (j)  Examine the Ram Air Exhaust Modulation Louver Assemblies (AMM 21-52-91/401). 1) If you find volcanic ash in the louver assemblies, clean the louvers, bearings and movable joints.Examine the Ram Air Actuators (AMM 21-52-11/401). 1) If you find volcanic ash in the air actuators, clean or replace the actuators.Examine the Ram Air Inlet Control Cables (AMM 21-52-81/501). 1) If you find volcanic ash on the control cables, clean the cable assemblies.
 (k) (l)  Remove and examine the Water Separators (AMM 21-51-41/701). 1) If you find volcanic ash in the water separators, clean the water separator coalescer.Remove and examine the recirculation Air Filters (AMM 21-21-23/401). 1) If you find volcanic ash in the filters, clean or replace the filters.

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 2)  If you find volcanic ash in the filters, remove and examine the Recirculating Air Fans (AMM 21-21-22/401). a) If you find volcanic ash in the fans, clean or replace
 the fans.
 (m)  
Remove and examine the Recirculation Air Check Valves (AMM 21-21-24/401). 1) If you find volcanic ash in the valves, clean or replace

 the valves.

 (n)  
Remove and examine the Equipment Cooling Automatic Flow Control Valve (AMM 21-58-31/401). 1) If you find volcanic ash in the valve, remove or replace

 the valve. Also, remove ash from the duct.

 (o)  
Remove and examine the Exhaust Fans (AMM 21-58-12/401) and Check Valves (AMM 21-58-51/401). 1) If you find volcanic ash in the fans or valves, clean or

 replace the fans and valves.

 (p)  
AIRPLANES WITH EFIS; Remove and examine the EFIS Cooling Fans (AMM 21-58-81/401) and EFIS Cooling Check Valves (AMM 21-58-91/201). 1) If you find volcanic ash in the fans or valves, clean or

 replace the fans and check valves.

 (q)  
AIRPLANES WITH EFIS; Remove and examine the EFIS cooling air cleaner (AMM 21-58-61/201). 1) If you find volcanic ash in the air cleaner, clean or

 replace the air cleaner.
 S 212-042
 (5)  Examine the following air conditioning system components if the air conditioning packs were operated during a sand/volcanic ash storm:
 (a)
Remove and examine the Turbofan Valves (AMM 21-52-71/401).

 1)  If you find volcanic ash in the turbofan valves, clean or replace the valves.

 (b)  
Remove and examine the Turbofans (AMM 21-52-61/401).

 1)  If you find volcanic ash in the turbofans, clean or replace the turbofans.

 (c)  
Remove and examine the air cycle pack primary and secondary Heat Exchangers (AMM 21-51-21/401). 1) If you find volcanic ash in the heat exchangers, clean or

 replace the heat exchangers.
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 (d)  
Remove and examine the pack 35 degree F Control Valves (AMM 21-51-51/401). 1) If you find volcanic ash in the control valves, clean or

 replace the control valves.

 (e)  
Remove and examine the flow control Pack Valves (AMM 21-51-71/401). 1) If you find volcanic ash in the pack valves, clean or

 replace the pack valves.

 (f)  
Remove and examine the Air Cycle Machine (ACM) (AMM 21-51-11/401). 1) If you you find volcanic ash in the ACM, clean or replace
　
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