- N2 SPEED SENSOR, L
- N2 SPEED SENSOR, R
(b) Previous leg report The EVMU sends the list of the LRUs which have been detected faulty during the legs (maximum 62) previous to the last leg. The faults detected are the same as for the last leg report.
(c) LRU identification The EVMU sends the EVM unit part number and manufacturer
(d) Class 3 failures The EVMU sends the list of the LRUs which have been detected faulty during a ground test. Only the three last detected failures are displayed. The following LRUs are tested :
- EVMU
- N1 BEAR VIB SENSOR, L
- N1 BEAR VIB SENSOR, R
- TRF VIB SENSOR, L
- TRF VIB SENSOR, R
(e) Test The test item allows initiation of a complete check of the EVM system. If no failure has been detected, the message TEST OK is displayed. If any failure has been detected the failed LRU is displayed. Checked LRUs are the ones listed in "GROUND FAILURES" item.
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R **ON A/C 051-051,
R R R R R R R R R (f) Initial values (Ref. Fig. 012) In that menu, ten sub-menus may be selected by the operator, which allows : - command of the initial values acquisition during the next flight - cancelling of the initial values acquisition demand - reading of the initial values taken - direct loading modification of the existing values.
R **ON A/C ALL
R (g) Accelerometer reconfiguration This menu allows selection of the accelerometer (Fan No. 1 bearing or TRF) to be used for the next flights. The EVMU also indicates which accelerometer is in operation.
R (h) Engine unbalance This menu allows selection, per engine, of five different engine speed, (from 50 percent to 100 percent N1 RPM) at which unbalance data will be stored. It also permits reading of the unbalance data which were acquired during the previous command and to perform balancing for both engines with both accelerometers.
R (i) Frequency analysis This menu offers the possibility to request a frequency analysis of the acceleration signal to be performed. Results of frequency analysis is sent to the printer.
R (j) Shop maintenance This menu is operational only when the EVMU is in the shop for maintenance. It allows trouble shooting of the LRU itself and corresponds to failures at SRU level.
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R EVMU - Initial Values Menu
R Figure 012
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NO.1 BEARING VIBRATION SENSOR (4002EV) - ADJUSTMENT/TEST
________________________________________________________
TASK 77-31-10-720-001
Electrical Test of the No.1 Bearing Vibration Sensor (4002EV)
1. Reason for the Job
__________________
To make sure that the No.1 bearing vibration sensor is serviceable before a fan trim balance or a vibration test. If the sensor is not serviceable at the end of this adjustment/test procedure, the engine stays serviceable and permits the subsequent flights. But, remove and replace the No. 1 bearing vibration sensor at the first shop visit. In between, use the vibration indications from the TRF vibration sensor.
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
R No specific plug cover 660-021M08 (Glenair) MIL-C-83723 or R equivalent. R No specific plug cover 660-022M08 (Glenair) MIL-C-83723 or R equivalent
No specific soft-nose connector pliers
No specific warning notice
No specific Megohmmeter 0-100 Meghoms
B. Consumable Materials
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
Material No. 05-044 NL FON 1-5920-50
POLYTHENE TAPE (Ref. 20-31-00)
Material No. 05-065 C Z-24.380
EROSION PROTECTIVE TAPE (Ref. 20-31-00)
Material No. 08-005 USA L-T-100 TYPE I
SEALING TAPE OBSOLETE-USE 08-005A ,B,C,
(Ref. 20-31-00)
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