NOTE: If NO IMBAL DATA shows, there is no stored balance data
____ in the AVM. The fan trim balance cannot be performed until after a flight or ground trim run is performed.
(b)
If you push and release the NO button, the BALANCE 1 PLANE COMPUTE? screen will show.
(c)
Push and release the YES button. This causes the FLIGHT X? screen to show.
NOTE: The X refers to the flight number, and can be 0 through
____ 5, where 0 is the last flight. Use the UP and DOWN ARROW buttons to make a selection of the flight that you want to see the imbalance history on.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
72-31-00
ALL ú ú N01 Page 534 ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
(d) Push and release the YES button. The screen that shows gives the highest imbalance data for the selected flight that was recorded (Table 505).
NOTE: The definitions of the screen are given below.
____
NOTE: There are six separate imbalance data screens for each
____
flight.
NOTE: Use the UP and DOWN ARROW buttons to get each of the
____
five other imbalance data screens that were recorded
during each flight.
NOTE: If no data was recorded for a particular screen then the
____
screen will appear as:
E1 --.-%
-.--/----:--/---
Use the UP and DOWN ARROW buttons to view the next imbalance data screen.
NOTE: Each data screen contains vibration information at a
____ different engine N1 speed. Typically, the six screens show vibration information for 108.1-102.1% N1, 102.0-99.1% N1, 99.0-97.1% N1, 97.0-96.0% N1, 95.9-93.0% N1, and 92.9-89.9% N1.
~..................................
| AVM FRONT PANEL DISPLAY |
| TABLE 505 |
....................................
| E 1 x x . x % |
| |
| n . n n / y y y |
| |
| m . m m / z z z |
| |
2..................................1
1) xxx - N1 rotor speed in percent
2) nnn - the fan displacement in mils
3) mmm - the LPT displacement in mils
4) yyy - the phase angle for the fan in degrees
5) zzz - the phase angle for the LPT in degrees
(e) From the IMBAL DATA READ? screen, push and release the NO button. This causes the BALANCE 1 PLANE COMPUTE? screen to show.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
72-31-00
ALL ú ú N01 Page 535 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
S 945-114-N00
(3) To go into the BALANCE 1 PLANE COMPUTE? menu to calculate a 1-plane (fan) balance solution, follow these steps:
NOTE: This menu will do a 1-plane trim balance calculation.
____
(a)
Push and release the YES button to do a 1-plane (Fan) balance solution. ~.................................. | AVM FRONT PANEL DISPLAY | | TABLE 506 | .................................... | C O M P U T E | | | | I N | | | | P R O G R E S S | | | 2..................................1
(b)
After the computation is completed the Display Panel will read: NO BALANCE DATA or X FLIGHTS DISPLAY?. 1) If the display reads NO BALANCE DATA press and release the
NO button to go to the Engine 2 balance menu.
(c)
Press and release the YES button to get the balance solution.
(d)
The screen that shows gives the balance data for the selected flight (Table 507).
NOTE: The definitions of the screen are given below.
____
NOTE: Use the UP and DOWN ARROW buttons to get to each of
____ the five other recorded balance data screens.
~..................................
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 1(130)
