Export Control
EAR Export Classification: Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3), except for the following Service Bulletins which are currently published as EAR Export Classification 9E991: SBE70-0992, SBE72-0483, SBE72-0580, SBE72-0588, SBE72-0640, SBE73-0209, SBE80-0024 and SBE80-0025.Copyright
© IAE International Aero Engines AG (2001, 2014 - 2021) The information contained in this document is the property of © IAE International Aero Engines AG and may not be copied or used for any purpose other than that for which it is supplied without the express written authority of © IAE International Aero Engines AG. (This does not preclude use by engine and aircraft operators for normal instructional, maintenance or overhaul purposes.).Applicability
All
Common Information
TASK 72-32-37-700-301 Fan Speed/Trim Balance Probes Electrical Harness - Test The Harness, Testing-001
General
Fig/item numbers in parentheses in the procedure agree with those used in the IPC. Only the primary Fig/item numbers are used. For the service bulletin alpha variants refer to the IPC.
Preliminary Requirements
Pre-Conditions
NONESupport Equipment
| Name | Manufacturer | Part Number / Identification | Quantity | Remark |
|---|---|---|---|---|
| Megger | LOCAL | Megger | 500 volts DC or equivalent | |
| Lamp and battery teter | LOCAL | Lamp and battery tester | 4.5 volts DC |
Consumables, Materials and Expendables
NONESpares
NONESafety Requirements
NONEProcedure
Refer to Figure.
NOTE
If the voltage supplied is in the limit of 24 volts DC, you can do the continuity test alternatively.Connect Lamp and battery teter to the eight pairs of the terminals at the ends of each wire in turn and make sure the light comes on.
Reject the harness if the light does not come on which shows no continuity.
SUBTASK 72-32-37-750-051 Do the Test for Continuity
Refer to Figure.
Terminal number 1 to terminal numbers 2 thru 8.
Terminal number 2 to terminal numbers 3 thru 8.
Terminal number 3 to terminal numbers 4 thru 8.
Terminal number 4 to terminal numbers 5 thru 8.
Terminal number 5 to terminal numbers 6 thru 8.
Terminal number 6 to terminal numbers 7 and 8.
Terminal number 7 to terminal number 8
NOTE
The test voltage is to be 500 volts DC.
Connect Megger, between each pair of the terminal ring tongues. Measure the insulation resistances:
The resistances must be more than 20 megohms.
Connect the Megger, between each terminal ring tongue and the NF tube. Measure the insulation resistances.
The resistances must be more than 20 megohms.
SUBTASK 72-32-37-750-052 Do the Test for Insulation Resistance
Figure: Fan Speed/Trim Balance Probes Harness and Schematic Wiring Diagram
Fan Speed/Trim Balance Probes Harness and Schematic Wiring Diagram
