- PHC-2 (6DA2)

 - wiring from the PHC 2 (6DA2) to the L static probe 2 (7DA2)

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
AMM 30-31-00-710-001 Operational Test of the Probe Ice Protection
 AMM 30-31-34-000-002 Removal of the Probe Heat Computer (PHC)
 (6DA1,6DA2,6DA3)
 AMM 30-31-34-400-002 Installation of the Probe Heat Computer (PHC)
 (6DA1,6DA2,6DA3)
 AMM 34-11-16-000-001 Removal of the Static Probe
 (7DA1,7DA2,7DA3,8DA1,8DA2,8DA3)
 AMM 34-11-16-400-002 Installation of the Static Probe
 (7DA1,7DA2,7DA3,8DA1,8DA2,8DA3)
 ASM 30-31/02

 3. Fault Confirmation
__________________
 A. Test
 (1) Do the operational test of the probe ice protection (Ref. AMM TASK 30-31-00-710-001).
 4. Fault Isolation
_______________
 A. If the test gives the maintenance message L STATIC PROBE 7DA2:
 - do a check of the resistance between pin 2 and pin 1.
 (1) If the resistance is more than 13 ohms (open circuit) or less than 10 ohms (short circuit):

 (a) Replace the PROBE-L STATIC, 2 (7DA2) (Ref. AMM TASK 34-11-16-000-001) and (Ref. AMM TASK 34-11-16-400-002).

 (2) If the resistance is between 10 ohms and 13 ohms:

 (a) Replace the PHC-2 (6DA2) (Ref. AMM TASK 30-31-34-000-002) and (Ref. AMM TASK 30-31-34-400-002).
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞30-31-00∞∞∞∞∞∞∞∞∞∞Page 233
 May 01/03R CES

 (b) If the fault continues:
 - do a check and repair the wiring from the PHC 2 (6DA2) to the L static probe 2 (7DA2) pin A/D to pin 2 (Ref. ASM 30-31/02).
 B. Do the operational test given in Para. 3.
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞30-31-00∞∞∞∞∞∞∞∞∞∞Page 234
 May 01/03R
 CES  Loss of the Power Supply for the Static Probe (PHC 2)

 1. Possible Causes
_______________
 - PHC-2 (6DA2)

 - wiring between the PHC 2 pin A/U and the ground terminal

 - wiring between the PHC 2 pin A/M and the circuit breaker (5DA2)

 - C/B-ANTI ICE/PROBES/2/STATIC (5DA2)

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
AMM 30-31-00-710-001 Operational Test of the Probe Ice Protection
 AMM 30-31-34-000-002 Removal of the Probe Heat Computer (PHC)
 (6DA1,6DA2,6DA3)
 AMM 30-31-34-400-002 Installation of the Probe Heat Computer (PHC)
 (6DA1,6DA2,6DA3)
 ASM 30-31/02

 3. Fault Confirmation
__________________
 A. Test
 (1) Do the operational test of the probe ice protection (Ref. AMM TASK 30-31-00-710-001).
 4. Fault Isolation
_______________
 A. Table of the circuit breakers used in this procedure:
 -------------------------------------------------------------------------------
PANEL DESIGNATION IDENT. LOCATION
 -------------------------------------------------------------------------------
122VU ANTI ICE/PROBES/2/STATIC 5DA2 Y11
 B. If the test gives the maintenance message CHECK STATICS PHC2 SUPPLY:
 - do a check of the status of the circuit breaker (5DA2).
 (1) If the circuit breaker is closed:
 - do a check for 28VDC at pin A/M of the PHC 2 (6DA2).
 (a) If there is 28VDC:
 - replace the PHC-2 (6DA2) (Ref. AMM TASK 30-31-34-000-002) and (Ref. AMM TASK 30-31-34-400-002).
 May 01/03R CES

 (b) If there is no 28VDC:
 - do a check for a ground signal at pin A/U of the PHC 2 (6DA2). 1 If there is no ground signal:
_
 - repair the wiring between the PHC 2 pin A/U and the ground terminal (Ref. ASM 30-31/02).
 2 If there is ground signal:
_
 - do a check of the wiring between the PHC 2 pin A/M and the circuit breaker (5DA2).
 a If there is no continuity:
_
 - repair the above wiring.
　
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