R R R R R R R R R  49-16-00-200-002 49-16-00-210-001 49-16-00-210-002 49-20-00-200-001 49-20-00-290-001 49-91-44-000-001 49-91-44-000-003 49-91-44-000-004 49-91-44-400-001 49-91-44-400-003 49-91-44-400-004 53-15-11-200-001 56-11-11-200-001 56-11-12-200-001 56-12-11-200-001 56-21-13-200-001 
56-31-00-210-001 
71-11-00-210-001 71-13-11-200-001 72-00-00-200-043 78-32-11-210-001 AMM 122227 PB 301 AMM 122232 PB 301 
3. Job Set-up__________
 Subtask 05-51-25-210-074
 A. General

Detailed Inspection of APU Air Intake, Diffuser
Elbow, Seals and Felt Metal (131-9(A))
Detailed Inspection of the Air Intake, Diffuser
Elbow, Seals and Felt Metal (GTCP 36-300)
Detailed Inspection of APU Air Intake, Diffuser
Elbow, Seals and Felt Metal (APS 3200)
Inspection/Check of the Engine (4005KM) (GTCP 36-300)
APU Power Plant Borescope Inspection (APS 3200)
Removal of the Oil Cooler (8079KM) (GTCP 36-300)
Removal of the Oil Cooler (8079KM) (APS 3200)
Removal of the Oil Cooler (8079KM) (131-9(A))
Installation of the Oil Cooler (8079KM) (GTCP 36-300)
Installation of the Oil Cooler (8079KM) (APS 3200)
Installation of the Oil Cooler (8079KM) (131-9(A))
Detailed Inspection of the Radome
Inspection of the Windshields
Inspection of the Fixed Windows
Inspection of the Sliding Windows
Detailed Visual Inspection of the Cabin Window Panes,
 including the Window Panes in Doors
Detailed Inspection of the Passenger/Crew Door
 Windows
Visual Inspection of the Air Intake Cowl
Visual Inspection of the Fan Cowl Doors
Procedure after Volcanic Ash, Dust, or Sand Ingestion
Detailed Visual Inspection of the Thrust Reverser
(for corrective action)
(for corrective action)

 WARNING : DO NOT BREATHE VOLCANIC ASH. DO NOT GET VOLCANIC ASH IN YOUR
_______ EYES. PUT ON PROTECTIVE CLOTHES, EYE GOGGLES AND A RESPIRATOR MASK. MAKE SURE THAT THE RESPIRATOR MASK CAN REMOVE VOLCANIC ASH FROM THE AIR. VOLCANIC ASH CAN CAUSE EYE IRRITATION AND INJURY TO THE RESPIRATORY SYSTEM.

R (1) Volcanic ash

R  (a) Volcanic ash is hard, very abrasive and acid (pH between 2 and 
R  neutral). 
R  It can cause erosion/abrasion, etching or shot-peening on the 
R  surfaces and can remove the finishes/protection and thus cause 
R  damage/corrosion. 
R  (b) The ash particles can be of different sizes but the texture of 
R  volcanic ash is almost the same as talcum powder and can enter 
R  all orifices and go through many seals. Volcanic ash will stay: 
R  - on bare and lubricated surfaces 
R  - in all corners 
R  - in bottom places. 
R  It can cause unusual wear and contamination of many aircraft 
R  systems and filter elements. 
R  (c) The volcanic ash will melt when it goes through the combustion 
R  chamber of the engines. 
R  The melted ash has very high adhesive qualities and bonds to 
R  engine parts and thus decreases engine performance. It may 
R  obstruct the fuel injectors and can cause an engine shutdown. 
R  (2) Inspection requirements 
R  (a) Volcanic ash can cause severe damage/contamination on the 
R  structure/systems of the aircraft. 
R  It is not possible to estimate the quantity and the type of 
R  damage after volcanic ash contamination. Therefore, it is 
R  necessary to do a full inspection of the aircraft to know the 
R  damage and make a decision about the necessary repair/action. 
R  (b) All the necessary inspections are visual unless the text gives 
R  other instructions. 
R  Operators can refer to the Non-destructive Testing Manual (NTM) 
R  and use non-destructive procedures. 
R  (c) If you find damage to the aircraft structure, refer to the 
R  Structural Repair Manual (SRM). The SRM has the approved damage 
R  limits and repair procedures. 
R  (d) If you find damage to paint/protection, refer to the Structural 
R  Repair Manual (SRM). The SRM has the approved paint/protection 
R  repair procedures.

R  (e) Examine the aircraft surfaces, structures, systems for 
R  contamination, erosion/abrasion, dents, etching, delamination or 
R  other damage. 
R  Subtask 05-51-25-210-075 
R  B. Inspection Preparation 
R  (1) If contamination occured in flight or during landing or take off: 
　
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