EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
12-25-01
ALL ú ú 01 Page 305 ú Sep 28/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL
S 843-028
CAUTION:_______ WHENEVER AN OPENING IS COVERED, MAKE SURE THAT CONDITION IS
VISIBLE FROM THE GROUND. ENGINES SHOULD NOT BE OPERATED WITH
COVERS IN PLACE BECAUSE THE COVERS CAN COME OFF AND DAMAGE THE
ENGINES.
(6) Use yellow vinyl adhesive tape and black polyethylene sheet to cover these openings, but do not seal them air-tight:
(a)
Surge tank and fuel tank vents
(b)
APU exhaust duct outlet port
(c)
APU oil cooling air exhaust port
(d)
Overboard exhaust valve port
(e)
Ram air inlet and outlet doors
(f)
Outflow valve
S 843-040
WARNING: WHEN THE STATIC PORTS ARE COVERED, MAKE SURE THAT CONDITION IS
_______ VISIBLE FROM THE GROUND. IN ADDITION, ATTACH A TAG TO THE LEFT CONTROL WHEEL IN THE FLIGHT DECK AS A REMINDER THAT STATIC PORTS ARE COVERED. FAILURE TO OBSERVE AND REMOVE COVERINGS OVER STATIC PORTS BEFORE FLIGHT MAY CAUSE LARGE ERRORS IN AIRSPEED-SENSING AND ALTITUDE -SENSING SIGNALS, WHICH MAY LEAD TO LOSS OF SAFE FLIGHT.
CAUTION: WHENEVER AN OPENING IS COVERED, MAKE SURE THAT CONDITION IS
_______ VISIBLE FROM THE GROUND. ENGINES SHOULD NOT BE OPERATED WITH COVERS IN PLACE BECAUSE THE COVERS CAN COME OFF AND DAMAGE THE ENGINES.
(7) Use yellow vinyl adhesive tape and orange barricade tape that has "REMOVE BEFORE FLIGHT" printed on it in black letters to cover the alternate static ports and elevator feel static ports in the following manner (see Fig. 301 for the locations of the static ports. See Fig. 302 Sheet 1, for illustrations of the static port cover placement procedure for alternate and elevator feel static ports):
WARNING: DO NOT PLACE 3M NO. 471 YELLOW VINYL ADHESIVE TAPE OVER
_______
THE HOLES OF THE STATIC PORTS.
(a) Clean the area around each static port with aliphatic naphtha or equivalent, and a clean dry rag where you will put the 3M No. 471 yellow vinyl adhesive tape (see Fig. 302 Sheet 1).
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
12-25-01
ALL ú ú 01 Page 306 ú Sep 28/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL
ú ú (b) Place one end of approximately a 4-foot piece of the orangebarricade tape over the holes of the static port and secure the upper edge with 5 inches of No. 471 yellow vinyl adhesive tape (see Fig. 302 Sheet 1, Steps 1 and 2).
NOTE:____ Smooth the 3M No. 471 yellow vinyl adhesive tape on the airplane surface to make sure the bond is satisfactory.
(c) (d) 1) Do not put vinyl adhesive tape over the holes of the static port.Put a 5-inch piece of vinyl adhesive tape on each vertical edge of the barricade tape overlapping the first strip of adhesive tape. (See Fig. 302 Sheet 1, Step 3)Put an 8-inch piece of vinyl adhesive tape horizontally over the barricade tape below the static port holes, overlapping the two vertical strips of adhesive tape. (See Fig. 302 step 4)
S 423-048
(8) For the primary static ports, use the following static port cover procedure (see Fig. 302 Sheet 2 for illustrations of the primary static port cover placement procedure. See Fig. 301 for the locations of the primary static ports).
WARNING:_______ DO NOT PLACE 3M NO. 471 YELLOW VINYL ADHESIVE TAPE OVER
THE HOLES OF THE STATIC PORTS.
(a) (b) Clean the area around each primary static port with aliphatic naphtha or equivalent, and a clean dry rag where you will put the 3M No. 471 yellow vinyl adhesive tape (see Fig. 302 Sheet 2).Place one end of a 4-foot piece of the orange barricade tape over the holes of the upper primary static port and secure the upper edge with 5 inches 3M No. 471 yellow vinyl adhesive tape (see Fig. 302 Sheet 2, Steps 1 and 2).
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