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ELEVATOR POWER CONTROL UNIT - INSPECTION/CHECK
1. General
A. This procedure has these inspection tasks:
(1) Elevator Power Control Unit (PCU) Visual Inspection
(2) Elevator PCU Inspection.
(a) This task supplies the data for a dimensional inspection of the elevator PCU.
(b) This task does not remove or install the elevator PCU, refer to the Elevator Power Control
Unit - Removal/Installation procedures to remove and install the elevator PCU.
TASK 27-31-14-210-801
2. Elevator Power Control Unit Visual Inspection
A. References
Reference Title
29-11-00-860-801 Hydraulic System A or B Pressurization (P/B 201)
29-11-00-860-805 Hydraulic System A or B Power Removal (P/B 201)
B. Location Zones
Zone Area
317 Tail Cone Compartment - Left
318 Tail Cone Compartment - Right
C. Access Panels
Number Name/Location
318BR Tailcone Access Door
D. Procedure
SUBTASK 27-31-14-860-006
(1) To pressurize hydraulic systems A and B, do this task: Hydraulic System A or B
Pressurization, TASK 29-11-00-860-801
SUBTASK 27-31-14-010-003
(2) Remove this access panel:
Number Name/Location
318BR Tailcone Access Door
to get access to the Elevator Power Control Units.
SUBTASK 27-31-14-210-001
(3) Do a general visual inspection of the elevator power control unit.
SUBTASK 27-31-14-860-007
(4) To remove power from hydraulic systems A and B, do this task: Hydraulic System A or B
Power Removal, TASK 29-11-00-860-805
SUBTASK 27-31-14-410-003
(5) Install this access panel:
Number Name/Location
318BR Tailcone Access Door
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TASK 27-31-14-200-801
3. Elevator Power Control Unit - Inspection
(Figure 601)
A. General
(1) This procedure gives wear limits and repair data for the elevator power control unit (PCU).
B. References
Reference Title
27-31-14-000-801 Elevator Power Control Unit - Removal (P/B 401)
27-31-14-400-801 Elevator Power Control Unit Installation (P/B 401)
C. Tools/Equipment
Reference Description
STD-1096 Micrometer - Depth, 0-1 Inch, Readable to 1/1000 Inch
STD-1097 Caliper - Vernier, 0-6 Inch, Readable to 1/1000 Inch
D. Location Zones
Zone Area
317 Tail Cone Compartment - Left
318 Tail Cone Compartment - Right
E. Procedure
SUBTASK 27-31-14-020-005
(1) Remove the elevator power control unit (PCU). To remove it, do this task: Elevator Power
Control Unit - Removal, TASK 27-31-14-000-801.
SUBTASK 27-31-14-020-006
(2) Use these tools to check for wear on the parts of the elevator PCU connections:
(a) micrometer (0-1 Inch, readable to 1/1000 Inch), STD-1096
(b) readable to 1/1000 inch vernier 0 - 6 inch caliper, STD-1097.
SUBTASK 27-31-14-020-007
(3) Examine the parts of the elevator PCU connections for worn areas:
(a) Remove the parts to be checked.
(b) Measure the parts as necessary with a micrometer (0-1 Inch, readable to 1/1000 Inch),
STD-1096 or a readable to 1/1000 inch vernier 0 - 6 inch caliper, STD-1097.
(c) Compare the dimensions you measured with the permitted wear dimensions that follow.
(d) If the parts are not in the tolerance, replace or repair the part as required.
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Table 601/27-31-14-993-801
NAME OF THE
PARTS THAT ARE
IN CONTACT
DIM.
DIAMETER DESIGN LIMITS WEAR LIMITS
MINIMUM
inches/mm
MAXIMUM
inches/mm
PERMITTED
MAXIMUM I.D./
MINIMUM O.D. OF
WORN PART
MAXIMUM
SERVICE
DIAMETRIC
CLEARANCE
#1 BEARING I.D.
0.4995 in 0.5000 in 0.5030 in
12.687 mm 12.700 mm 12.776 mm 0.0035 in
#1 BOLT O.D.
0.4985 in 0.4995 in 0.4981 in 0.089 mm
12.662 mm 12.687 mm 12.652 mm
#2 PCU END
FITTING BUSHING
I.D.
0.4995 in
12.687 mm
0.5000 in
12.700 mm
0.5030 in
12.776 mm 0.0035 in
#2 BOLT O.D.
0.4985 in 0.4995 in 0.4981 in 0.089 mm
　
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