TASK 70-22-04-110-016
1 . General.
The three cleaning methods described in this procedure are effective for removing flight contamination (dirt, oil, organic matter, etc.) from sound-suppression panels. These cleaning methods do not damage the panels when used as directed.
2 . Equipment.
Subtask 70-22-04-110-161
A.Specialized equipment is required for each procedure and is identified in each section.
3 . Materials.
Subtask 70-22-04-110-162
 
Steam Cleaning Materials - Table 1
 
Materials
Consumable No.
Operating Temperature °F (°C)
 
Plaudit
C04-078  
225-250 (107-121)
 
Jet Clean B
C04-078  
225-250 (107-121)
 
High Pressure Cleaning Materials - Table 2
 
Materials
Consumable No.
Operating Temperature °F (°C)
 
MagChem Aerodet
C04-191  
120-150 (49-66)
4 . Procedure I: Steam Cleaning.
Subtask 70-22-04-110-163
B.Use a steam cleaner such as the Malsbary Model 230SVC or Walters Model 248F (or equivalent) with a fan spray nozzle. Refer to Malsbary Manufacturing Co. or Walters Manfacturing Co. in the List of Suppliers in Step 4 of 70-80-00.
C.Mix detergent cleaning solution to obtain a concentration of two percent by volume of detergent solution in water. Use one of the materials indicated in Table 1 of Subtask 70-22-04-110-162, Materials.
CAUTION:
DO NOT DIRECT THE SPRAY ON ANY ONE AREA LONGER THAN FIVE SECONDS.
D.At a pressure of 80-100 psi (552-690 kPa) direct the spray into the sound suppression holes in the face of the panel while keeping the nozzle moving across the face of the panel at a distance of 14-18 inches (356-457 mm) and at a rate of 10-25 seconds from one end of the panel to the other.
E.After cleaning, turn off the detergent, and rinse the panel thoroughly with clear water. Drain and blow dry with clean shop air.
5 . Procedure II: High-Pressure Detergent Wash.
Subtask 70-22-04-110-164
F.Use a high-pressure nozzle equipped Magnus Jet-Off Gun( Magnus Equipment). Refer to the List of Suppliers in Step 4 of 70-80-00.
G.Mix solution to obtain a concentration of 50 percent by volume of detergent solution in water. Use one of the materials indicated in Table 2 of Subtask 70-22-04-110-162, Materials.
H.Using this solution at a pressure of 80-100 psi (552-690 kPa), direct the spray into the sound-suppression holes of the panel from a distance of 4-6 inches (102-152 mm).
I.After cleaning, drain panel and rinse thoroughly with clear water. Blow dry with clean shop air.
6 . Procedure III: Ultrasonic Cleaning.
Subtask 70-22-04-110-165
J.Using TASK 70-21-15-130-001, Cleaning Method No. 15 - Ultrasonic Cleaning, place panels in cleaner tank, being careful to let air escape from cavities in which it might be entrapped.
K.Turn on ultrasonic generator and clean for 3-5 minutes.
L.After cleaning, drain panel and rinse thoroughly with clear water. Blow dry with clean shop air.