757 AMM 飞机维护手册 SERVICING 2(79)

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_______ STATIC PORTS BEFORE FLIGHT MAY CAUSE LARGE ERRORS IN AIRSPEED-SENSING AND ALTITUDE-SENSING SIGNALS, WHICH MAY LEAD TO LOSS OF SAFE FLIGHT.
 CAUTION: REMOVE ALL BARRICADE TAPE, COVERS, POLYETHYLENE SHEET AND VINYL
_______ ADHESIVE TAPE. ENGINES SHOULD NOT BE OPERATED WITH COVERS IN PLACE BECAUSE THE COVERS CAN COME OFF AND DAMAGE THE ENGINES.
 (3)  Remove all barricade tape, covers, polyethylene sheet and vinyl adhesive tape from the following openings:
 (a)  
Static ports

 1)  Inspect each static port and if necessary use naphtha or equivalent, to remove all tape residue, dirt and other contaminants around the port.

 (b)  
Surge tanks and fuel vents

 (c)  
APU exhaust duct outlet port

 (d)  
APU oil cooling air exhaust port

 (e)  
Overboard exhaust valve port

 (f)  
Ram air inlet and outlet doors

 (g)  
Outflow valve

 S 843-034
 (4)  Remove the "STATIC PORTS COVERED" tag from the left control wheel in the flight deck.
 TASK 12-25-01-103-016
 3.  Polish the External Surfaces of the Airplane
____________________________________________
 A.  Equipment
 (1)  
Bonnet, Wool Pile - commercially available

 (2)  
Buffer Wheel, Cotton cloth, 80/92 thread count, Spiral sewn, 4- or 6-inch diameter, 5/8- or 7/8-inch thick, 1/4-inch diameter arbor hole - commercially available

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MAINTENANCE MANUAL

 (3)  
Buffer Wheel, Hard Cloth, machine sewn, bias-type, 7 x 3 x 5/8-inch, 16 Ply - commercially available

 (4)  
Burnishing Tool - commercially available

 (5)  
Sander/Polisher, Orbital, Air-Driven - commercially available

 B. Consumable Materials
 (1)  
C00523 Alodine 1000 - MIL-C-5541

 (2)  
B00047 Acid Nitric - O-N-350

 (3)  
G00033 Cheesecloth - Woven, Rymplecloth No. 301

 (4)  
B00568 Compound - Cutting and Coloring, Schaffner No. 521, White Bar

 (5)  
B00567 Compound - Coloring, Schaffner No. 4094, Green Bar

 (6)  
D00281 Lubricant - Petroleum jelly

 (7)  
G02045 Pad - Scotch Brite, Fine or Ultrafine

 (8)  
B00569 Paste - Fine Polishing, Schaffner No. AS0410

 (9)  
B00570 Polish - Turco 1495-X

 (10)
 G00033 Wiper - BMS 15-5D, Class A

 C. References
 (1)  AMM 51-21-04/701, Alodine Coating
 D. Prepare to Polish the Surface
 S 103-017
 (1)  Do the procedure to Clean the External Surfaces of the Airplane to clean the surfaces that you will polish.
 E. Polish the Surface
 S 603-043
 WARNING:_______DO NOT POLISH THE STATIC PORTS. IF POLISHING MATERIAL ENTERS THE STATIC PORTS, IT MAY CAUSE LARGE ERRORS IN AIRSPEED-SENSING AND ALTITUDE-SENSING SIGNALS, WHICH MAY LEAD TO L0SS OF SAFE FLIGHT.
 (1)  PROCEDURE I - Polish the surface to repair light stains or to make the surface bright.
 (a)  Use the wiper to remove the outer layer of protection as necessary.
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MAINTENANCE MANUAL

 (b)  Manually or mechanically polish the surface as follows: 1) ALTERNATIVE I - Manually polish the surface. a) Apply AS-0410 fine polishing paste or Turco 1495-X
 polish to the BMS 15-5D Class A wiper. b) Rub the damaged area of the surface with the wiper.
 NOTE: Rub in the direction of the grain of the
____ metal until you get the necessary finish.
 2) ALTERNATIVE II - Mechanically polish the surface. a) Apply AS-0410 fine polishing paste or Turco 1495-X polish to the BMS 15-5D Class A wiper. b) Polish the damaged area of the surface with the orbital, air-driven sander/polisher.
　
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