R Internal Cable Wear Figure 603/TASK 20-24-12-991-004
1EFF : 1 1 1CES ALL 1 111 20-24-12 Page 605 May 01/00
R Cable Wear Figure 604/TASK 20-24-12-991-005
1EFF : 1 1 1CES ALL 1 111 20-24-12 Page 606 May 01/00
(b)
Examine the cables. Make sure that there are no broken wires, to do this:
-move a cloth along the cable, in the two directions.
(c)
If the cloth catches on the cable:
-make a visual inspection to find the broken wires.
(d)
The permitted limits for the cables with broken wires are:
-
for class 7 x 19 cable, 6 broken wires in a same one-inch (25.4 mm) length of cable with not more than 3 broken wires for each strand.
-
for class 7 x 7 cable, 3 broken wires in a same one-inch (25.4 mm) length of cable with not more than 2 broken wires for each strand.
NOTE : There must be no broken wires in two consecutive one-inch
____
(25.4 mm) lengths of cable.
For the lengths of cables which go around pulleys or
through fairleads and pressure seals:
-not more than 3 broken wires is permitted
(2) Check of the external wear of the cable
(Ref. Fig. 602/TASK 20-24-12-991-003)
(a) Make a visual inspection of the cables, specially the lengths that can touch pulleys, fairleads or pressure seals. Make sure that they are not worn.
R (Ref. Fig. 604/TASK 20-24-12-991-005)
(b) The permitted wear limits in a same one-inch (25.4 mm) length of cable are:
-
for class 7 x 19 cable, a maximum of 6 wires worn to 50 % or more of their diameter,
-
for class 7 x 7 cable, a maximum of 3 wires worn to 50 % or more of their diameter, if there are no broken wires.
NOTE : The number of permissible worn wires in a same one-inch
____ (25.4 mm) length of cable is decreased by one wire for every broken wire. A maximum of two one-inch (25.4 mm) lengths of cable with wear (within the limits specified above) is permissible on the total length of the cable (between the two cable terminals) on the condition that the wear is not on two consecutive one-inch (25.4 mm) lengths of cable. If a wire is worn to more than 60 % of its diameter, you must call it a broken wire.
(3) Internal Cable Wear R (Ref. Fig. 603/TASK 20-24-12-991-004)
(a) In some areas (for example around pulleys and quadrants) the cable can wear internally more than it wears externally. To find such wear, move the strands apart to examine the cable internally.
(4) Corrosion
NOTE : Corrosion of cables specially occurs in these areas:
____ -battery compartments,
-toilets,
-landing gear wells.
- other areas where fumes, vapors and liquids that can cause corrosion can collect.
(a)
If a cable has a broken wire in a length that does not touch airframe components which can make it wear, pulleys, fairleads etc...
-carefully examine the cable. Make sure that it has no corrosion.
(b)
If necessary remove the cable. Bend the cable to make sure that the internal strands do not have corrosion.
(c)
If you find surface corrosion:
-loosen the cable,
-make a full inspection of the inner strands.
(d)
Discard the cable if you find corrosion on the inner strands.
(e)
If you find light surface corrosion, remove it and protect the cable again (Ref. TASK 20-24-11-100-001)
TASK 20-24-12-200-003
Inspection of the Pulleys
1.
Reason for the Job
__________________
Self Explanatory
2.
Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
20-24-12-991-006 Fig. 605
3. Job Set-up
__________ Subtask 20-24-12-869-052
A. Not Applicable
4. Procedure
_________ Subtask 20-24-12-210-052
A. Inspection of the Pulleys
(Ref. Fig. 605/TASK 20-24-12-991-006)
(1)
Do a check of the pulley condition for:
(a)
Cracked edges.
(b)
Signs of unusual wear in the bottom of the groove.
(c)
Cracked hub.
中国航空网 www.aero.cn
航空翻译 www.aviation.cn
本文链接地址：A320飞机维护手册 AMM STANDARD PRACTICES-AIRFRAME(79)
