DAMAGE TO EQUIPMENT.
(6)
Do the steps that follow with one of the two solvents (Methyl Ethyl Ketone or Trichlorotrifluoroethane) to clean the repair area.
(a)
Apply some solvent, from a soft bottle, to the repair area.
(b)
Make wet a piece of cheesecloth with the solvent.
(c)
Clean the repair area with the cheesecloth.
(d)
Dry the repair area in air for 10 (ten) minutes.
(e)
Clean the surface again until there is no remaining oil on the surface.
S 398-024-N00
(7)
Do the steps that follow to apply the potting compound to the repair area (optional to the aerodynamic dent filler).
(a)
In a clean cup, mix 1.0 gram of Part A with 0.09 gram of Part B.
(b)
Stir the mixture for two minutes.
NOTE: The mixture must be discarded after 30 minutes.
____
(c)
Use a clean dry trowel to apply the potting compound to the repair area.
(d)
If it is necessary, use a piece of tape to keep the potting compound in position.
(e)
Dry the compound for 3 (three) hours at ambient temperature before you touch it, or before the operation of the engine.
NOTE: The compound will be fully dry after 24 hours at ambient
____ temperature.
(f)
An alternate cure time of 2 (two) hours at 250°F (121.1°C) is also permitted.
(g)
Remove the tape.
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S 398-025-N00
(8)
Do the steps that follow to apply the aerodynamic dent filler to the repair area (optional to the potting compound).
(a)
In a clean cup, put one part with an equal volume or mass of the other part.
(b)
Mix the two parts satisfactorily.
NOTE: The aerodynamic dent filler is prepared when it becomes
____ thick (after six minutes at 70°-75°F (21.1°-23.9°C)).
(c)
Use a clean dry trowel to apply the aerodynamic dent filler to the repair area.
(d)
Refer to the manufacturer's instructions for the applicable cure time.
S 348-026-N00
(9) Make the surface of the repair area smooth, with a level that is not more than 0.015 inch (0.381 mm) higher than the adjacent surfaces.
NOTE: If the repair is in area B, it is not necessary to repair the
____
grooves.
S 418-027-N00
(10) If you removed the 1st-stage fan blades, install them (AMM 72-31-02/401).
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FAN EXIT CASE AND VANE - INSPECTION/CHECK
_________________________________________
1. General
_______
A. This procedure gives the steps for the inspection of the fan exit case and vane.
B. This procedure gives the continue-in-service and flyback limits.
C. The fan exit case and vane have an inner and outer aluminum case assembly and 84 fan exit vanes.
D. The fan exit case is attached at the forward end to the fan case and at the aft end to the intermediate case.
E. You must open the thrust reverser halves to get access to the fan exit case and vane.
TASK 72-33-02-206-001-N00
2. Examine the Fan Exit Case and Vane
__________________________________
A. References
(1)
AMM 70-31-01/201, Fluorescent Penetrant Inspection
(2)
AMM 71-11-04/201, Fan Cowl Panels
(3) 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：747-400 AMM 飞机维护手册 发动机 ENGINE 2(14)
