NOTE:____ For the Lucus Angle Star DP-60 digital protractor, use in one
mode, either the usual or alternate reference (ALT REF) mode,
through the entire adjustment.
Use the same measure scale through the full adjustment. The
procedure that follows is written in the usual mode of
operation.
(a)
Find the reference transfer location between STA 1460 to 1480 at LBL 20.50.
(b)
Make clean the top and bottom surfaces of the reference plate with a lint-free dry cloth.
(c)
Make clean the reference transfer points on the pressure deck stiffeners with a lint-free dry cloth.
(d)
Install the G34004 reference plate to the reference transfer points on the pressure deck stiffeners.
(e)
Attach the reference plate to the reference transfer points with three screws and nuts.
(f)
Torque the screws from 60 to 80 pound-inches.
(6) Install the G34004 transfer plate on the WXR antenna mount at the nose radome:
(a) Loosen the top left and right roll adjustment bolts on the WXR antenna mount.
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(b)
Do not loosen the top center or the two bottom roll adjustment bolts.
(c)
Install the two top support bolts and washers into the WXR antenna mount two top threaded holes from the G34004 transfer plate.
NOTE: The support bolts and washers used with the WXR antenna
____ installation can be used in place of the G34004 bolts and washers.
(d)
Install the G34004 transfer plate on the two top support bolts.
(e)
Install the two bottom support bolts through the transfer plate into the WXR antenna mount.
(f)
Torque the four support bolts for the transfer plate to 160-180 pound-inches.
(7) Measure the airplane pitch and roll at the reference transfer location:
NOTE: Make sure the digital protractor on the reference plate and
____ the transfer plate is turned in the same direction.
Look to see if the digital protractor reads a minus or plus angle or if it reads an up or down directional arrow.
(a) Lucas Angle Star DP-60; Push the ALT REF switch on the digital protractor to operate in the normal (gravity reference) mode.
NOTE: Use the digital protractor in one mode, either the
____ normal or alternate reference (ALT REF) mode, through the entire adjustment.
Use the same measure scale thorugh the full adjustment. The procedure that follows is written in the usual mode of operation.
(b)
Set the ON/OFF switch on the digital protractor to ON.
(c)
Set the digital protractor on the reference plate to read pitch (Fig. 201).
(d)
Kell Strom Pro 3600; Make sure the digital protractor has been in position for five seconds before reading the display.
EFFECTIVITY
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(e) Push the ALT REF switch on the digital protractor to operate in the normal (gravity reference) mode.
NOTE: Use the digital protector in one mode, either the normal
____ or alternate reference (ALT REF) mode, through the entire adjustment.
Use the same measure scale through the full adjustment. The procedure that follows is written in the usual mode of operation.
(f)
Read and record the plus or minus pitch value on the digital protractor.
(g)
Set the digital protractor on the reference plate to read roll (Fig. 201).
(h)
Kell Strom Pro 3600; Make sure the digital protractor has been in position for five seconds before reading the display.
(i)
Read and record the plus or minus roll value on the digital protractor.
(j)
Lucus Angle Star DP-60; Keep the ON/OFF switch on the digital protractor in the ON position.
(8) Adjust the WXR antenna mount to the airplane pitch value:
NOTE: Make sure the digital protractor on the transfer plate
____ is in the same direction as on the reference plate.
(a)
Loosen the six pitch bolts that hold the WXR antenna mount to the radome structure.
(b)
Make clean the measure surfaces on the transfer plate with a lint-free dry cloth.
(c)
Put the digital protractor on the pitch measure surface of the transfer plate.
(d)
Kell Strom Pro 3600; Make sure the digital protractor has been in position for 5 seconds before reading the display.
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本文链接地址：747飞机维护手册AMM CHAPTER 34 - NAVIGATION 第34章导航4(21)
