TASK 70-21-24-110-052
1 . General.
A.This procedure is for cleaning the exterior of gas turbine engines, including both titanium and non-titanium hardware. Products may be applied by spray, steam, foam, or gel application based on manufacturer's recommendations.
B.This procedure may be used as an alternate to TASK 70-21-03-160-001, Cleaning Method No. 3 - Steam Cleaning.
C.When using this procedure prior to Fluorescent Penetrant Inspection (FPI), process known defect standards or parts with the selected cleaner prior to FPI to ensure process capability is maintained.
2 . Equipment.
Subtask 70-21-24-110-521
D.Proper personal protection equipment shall be used and shall include, but not be limited to, protective gloves, apron, and eye wear. Specific equipment for safe handling will be described in the manufacturer's Material Safety Data Sheet for the specific cleaner.
E.Exterior engine cleaning shall be performed in an area with proper ventilation.
F.Various types of bristle brushes for part configuration or cleaning pads C10-010   may be used to assist the cleaning action of the chemicals.
3 . Materials.
Subtask 70-21-24-110-522
NOTE:
The following materials are required for the application of this process:
 
Consumable Product
No.
Concentration
 
Turco 5948 DPM
C04-208
20-30% by volume
 
Turco 5948 DPM Thick
C04-232
As Received
 
Ardrox 6085
C04-209
As Received
 
Ardrox 6333A
C04-163
15-20% by volume
 
Ardrox 6376
C04-267
15-20% by volume
 
Ardrox 1900B
C04-210
As Received
 
MagChem DG-Kleen
C04-184
15-20% by volume
 
Nuvite Nu-Gear-SC
C04-206
20-25% by volume
 
Super Bee 262
C04-211
As Received
 
Cee-Bee A-7X7
C04-165
15-25% by volume
 
Gas Path Cleaner - Type IIA
C04-140
As Received
 
Gas Path Cleaner - Type II
C04-140
20%
 
Super Bee 300LF or Super Bee 300LFG
C04-221
5-10% by volume
4 . Procedure.
Subtask 70-21-24-110-523
G.Cover all openings to the interior of the engine with appropriate plugs, masks, or tape C10-021  . This includes inlet and exhaust ducts and all tubes. Open electrical connectors should be sealed with foil and/or tape.
H.Apply one of the cleaners using spray, wipe, foam, or gel application techniques recommended by the manufacturer. The cleaners are identified in Subtask 70-21-24-110-522, Materials.
NOTE:
Various types of bristle brushes suitable for the part configuration or cleaning pads C10-010   may be used to enhance the cleaning process.
I.Allow the cleaner to dwell 5 to 20 minutes.
J.Rinse the exterior of the engine fully with warm or hot water. If hot water is used, temperature shall be minimum 150°F (66°C).
K.Remove all coverings that were installed in step A.
5 . Quality Assurance.
Subtask 70-21-24-110-524
L.Visually check the part for cleanliness.
M.Repeat the process if necessary.