22-12-04
ALL ú ú 01 Page 408 ú May 28/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757 MAINTENANCE MANUAL
S 714-080
(9)
Push the YES/ADV switch until the MCDP top line message shows 66 FEEL POS DEG.
S 214-034
(10)
Turn the transducer body until the MCDP bottom line shows less than +1 degree.
(a) Make sure the electrical zero mark on the transducer body is less than 30 degrees from the electrical zero mark on the shaft.
S 214-035
(11) Tighten the clamping nut.
(a) Make sure the MCDP bottom line value stays less than +1.0 degree.
S 034-036
(12)
Remove the safety wire from the vernier rod.
S 214-037
(13)
Turn the knurled ring on the vernier rod until the MCDP bottom line shows 0.00 |0.1 degrees with the control column released.
S 434-038
(14)
Lock the knurled ring to the vernier rod with wire.
S 034-039
(15)
Remove the block and clamp from the upper feel unit input arm.
S 714-040
(16)
Do the Test the Transducer Installation steps.
G. Adjust Elevator Neutral Shift Rotary Transducer with the Phase Angle Voltmeter
S 864-041
(1)
Set the stabilizer trim to 2 units so dimension B=22.24 |0.05 inches (Fig. 402).
S 864-042
(2)
Pressurize the auxiliary pitots 1 and 2 to 350 knots (4.0 psig) (Ref 34-11-00).
S 864-043
(3)
Shake the lower (Captain's) feel unit input arm to make sure the arm is in the center.
S 434-044
(4)
Using a suitable block/clamp combination, restrain the upper (First Officer's) feel unit input arm.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
22-12-04
ALL ú ú 01 Page 409 ú Jan 20/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL
S 034-045
(5) Loosen the transducer clamp to let the transducer body turn.
S 434-046
(6) Install the breakout box between the transducer and the airplane wiring.
S 864-047
(7) Remove the DO-NOT-CLOSE tags and close these circuit breakers on the P11 panel: (a) 11E17, FLT CONT COMPUTER POWER LEFT (b) 11E18, FLT CONT COMPUTER SERVO LEFT (c) 11E20, FLIGHT CONT CMPTR PWR CTR (d) 11E21, FLIGHT CONT CMPTR SERVO CTR (e) 11E35, FLT CONT CMPTR PWR RIGHT (f) 11E36, FLT CONT CMPTR SERVO RIGHT
S 214-048
(8) Measure the output of the transducer on pins 3 and 5 with a Phase Angle Voltmeter.
S 214-049
(9) Turn the transducer body until you get an in-phase (absolute) output voltage of less than 1.25v ac. Make sure the electrical zero mark on the transducer body is less than 30 degrees from the electrical zero mark on the shaft.
S 214-050
(10)
Tighten the clamping nut. Make sure the in-phase output voltage is less than 1.25v ac.
S 034-051
(11)
Remove the lockwire from the vernier rod.
S 214-052
(12)
Turn the knurled ring on the vernier rod to get the smallest in-phase voltage. Make sure the voltage is less than 0.040v ac.
S 434-053
(13)
Lock the knurled ring to the vernier rod with wire.
S 034-054
(14)
Remove the breakout box and the phase angle voltmeter.
S 434-055
(15)
Connect the transducer electrical connector.
S 034-056
(16)
Remove the block and the clamp from the upper feel unit input arm.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
22-12-04
ALL ú ú 01 Page 410 ú Mar 20/90
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757 MAINTENANCE MANUAL
S 714-057
(17) Do the Test the Transducer Installation steps.
H. Test the Transducer Installation
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本文链接地址：757 AMM 飞机维护手册 自动飞行 AUTOFLIGHT 1(154)
