TRIM BALANCE DATA WORKSHEET
AIRCRAFT NO. _____ ENGINE POSITION ___ ENGINE S/N ________ ENGINE MODEL______ RUN NO. ___ RUN TYPE _____ DATE _________
PICK-UP N1 (DEG) PHASE DISPL (MILS) REMARKS
L-A9232 (0000) PW V
Trim Balance Data Worksheet Example
Figure 506
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
AVM SIGNAL CONDITIONER
B
E1/E2 RACK
SEE A
LP COMPRESSOR CASE
E2-1 (OPTIONAL)
AVM SIGNAL
CONDITIONER EXTENSION
CABLE
SEE B
E1-1 8900-6765
FWD E1/E2 RACK A CABLE EXTENSION
PBS-4100 COMPUTER PBS-4100 DATA AQUISITION UNIT OUT OUT PBS-4100 TACH N2/N3TACH N1 8900-5065
IN IN SWITCH BOX
INPUTS VIBRATION ENGINE SELECTOR PBSAVM ENG 4 ENG 2 ENG 3 ENG 1
ALTERNATE A 8900-6714
JUMPER CABLE 8115-6713 L-B3055(0000)
Trim Balance Equipment Installation
Figure 507
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INLET CONE - REMOVAL/INSTALLATION
_________________________________
1. General_______
A. The procedure that follows gives a task for the removal and installation
of the inlet cone.
B. The inlet cone has a front and rear segment. The rear segment is
installed on the hub of the low pressure compressor (LPC).
C. You must open the inlet cowl to get access to the inlet cone.
TASK 72-31-01-004-001-N00
2. Inlet Cone Removal (Fig. 401)__________________
A. Equipment
(1)
PWA 86122 Puller
B.
Standard Tools and Equipment
(1)
Mat - Protective, Rubber Manufacturer's Association, Grade SC43, neoprene sponge, 1 inch thick, 5 x 6 feet with warning streamers attached (three are necessary).
C.
Consumable Materials
(1)
G00758 Pen - Marking, Cado Marker
D.
References
(1)
IPC 72-31-01 Fig. 5
E.
Access
(1)
Location Zone
412 Engine 1 - Front LPC Hub
422 Engine 2 - Front LPC Hub
432 Engine 3 - Front LPC Hub
442 Engine 4 - Front LPC Hub
F.
Procedure
S 864-002-N00
(1)
Make sure the fuel control switches are in the CUTOFF position.
(a)
Install DO-NOT-OPERATE tags on the switches.
S 494-003-N00
CAUTION: MAKE SURE THAT YOU PUT COVERS ON ALL OF THE LOWER HALF OF THE
_______ INLET COWL SURFACE. ALSO MAKE SURE THAT THE EDGES OF THE MATS ARE NEAR EACH OTHER OR ATTACHED WITH TAPE. IF THE EDGES ARE NOT, THEN THE TOOLS OR PARTS CAN FALL AND CAUSE DAMAGE TO THE INLET COWL SURFACE.
(2)
Put the protective mats on the lower half of the inlet cowl.
S 934-004-N00
(3)
Make a mark with the pen on the front and rear segments of the inlet cone and the compressor hub.
NOTE: This is to make sure they align during the installation.
____
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
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