-------------------------------------------------------------------------------
9. Generator Oil Temp Program oil temperature = 16 DEG. C
(61 DEG. F) -------------------------------------------------------------------------------R **ON A/C 063-099, 401-499,
B. Alternate Values for Failed Sensors
(1) The ECB 59KD programs alternate values for certain failed LRUs. These are identified in the PUT or during the APU IOT. The LRU failures and the alternate actions are listed in Table 1. There is a time delay period between the failure of the LRU and program of the alternate value. The ECB uses the last value indicated before LRU failure.
(2) Table 1 Alternate Values List for Failed Sensors -------------------------------------------------------------------------------Failed Action -------------------------------------------------------------------------------
1. P2 Sensor A. On ground: use Pt,
if Pt fails = 13,66 psia
B. in flight: use Pt,
if Pt fails = 7 psia -------------------------------------------------------------------------------
2.
DELTA P Sensor calculated from Pt, P2 -------------------------------------------------------------------------------
3.
PT Sensor A. On ground: 13,66 psia
B. In flight: 7 psia -------------------------------------------------------------------------------
4. LCIT Sensor A. Program T2 based on P2
B. If P2 also failed: Program T2 based on
programmed value P2. ------------------------------------------------------------------------------
5. LVDT Sensor A. When Bleed On: IGV max. 92 deg
B. When no load: IGV max. 92 deg. at N > 80%
IGV min. = 0 deg ------------------------------------------------------------------------------
6. APU Sump Oil Sensor A. Use Generator oil temperature
B. If Gen. oil temp. fails = 110 deg. F
(43 deg. C) ------------------------------------------------------------------------------
7. T2 A. Program T2 based on P2
B. If P2 also failed: Program T2 based on
programmed value P2 -------------------------------------------------------------------------------
8.
LCDT Set equal to last valid value -------------------------------------------------------------------------------
9.
Generator Oil Temp A. Use APU sump oil temperature
B. If Sump oil temp. fails = 110 deg. F
(43 deg. C) -------------------------------------------------------------------------------
CONTROL AND MONITORING - DESCRIPTION AND OPERATION
__________________________________________________
1. General
_______ The Electronic Control Box (ECB) contains a Full Authority Digital Electronic Control (FADEC) to control the operation and monitoring of the Auxiliary Power Unit (APU). The ECB additionally provides communication to other aircraft systems. The ECB gives:
-
Control of the automatic operation of the APU,
-
Control of the APU at governed speeds,
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