- RELAY-ENGINE 2 START (16HB)

 - wiring

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
AMM 21-51-00-200-001 Delta P Sense Lines Torque Check and Inspection
 AMM 21-51-00-710-002 Operational Test of the Flow Control and Indicating
 System
R AMM 21-51-51-000-001 Removal of the Pack Flow-Control Valve
R AMM 21-51-51-400-001 Installation of the Pack Flow-Control Valve AMM 21-51-51-600-001 Scheduled Replacement of a Pack Flow-Control Valve Trailing-Edge Probe Filter AMM 21-61-00-710-001 Operational Test of the Pack Temperature-Control System AMM 21-61-34-000-001 Removal of the Pack Controller (7HH, 27HH)
R AMM 21-61-34-000-002 Removal of the Air-Conditioning System Controller
R (47HH, 57HH) AMM 21-61-34-400-001 Installation of the Pack Controller (7HH, 27HH)
R AMM 21-61-34-400-002 Installation of the Air-Conditioning System
R Controller (47HH, 57HH) AMM 73-25-34-710-040 Operational Test of the Engine Interface Unit (1KS1,1KS2) ASM 21-51/01 ASM 21-51/02 ASM 21-51/02

 3. Fault Confirmation
__________________

 A. Test
 (1) Do the operational test of the flow control and indication system (Ref. AMM TASK 21-51-00-710-002).

 (2) Do the operational test of the pack temperature-control system (Ref. AMM TASK 21-61-00-710-001).

 4. Fault Isolation
_______________
 A. If the test is OK, no other maintenance action is necessary.
 **ON A/C 001-003, 051-054,
 B. This paragraph is only applicable for flow control valves with the part numbers which follow: P/N 751A0000-07 Amendment ABC, P/N 751A0000-07 Amendment BC and, P/N 751B0000-02 Amendment AB.
 (1) If the test confirms the fault:
 (a) Replace the Flow-Control Valve Filter (Ref. AMM TASK 21-51-51-600-001).

 (b) If the fault continues:

 - replace the VALVE-FLOW CTL (11HB) (referred to as FCV (11HB)) (Ref. AMM TASK 21-51-51-000-001) and (Ref. AMM TASK 21-51-51-400-001).
R **ON A/C 004-049, 055-099, 101-149, 151-199, 201-299, 301-399,
 B. If the test confirms the fault:
 - replace the VALVE-FLOW CTL (11HB) (referred to as FCV (11HB)) (Ref. AMM TASK 21-51-51-000-001) and (Ref. AMM TASK 21-51-51-400-001).
R **ON A/C 401-499,
 B. If the test confirms the fault:
 - replace the P1 FLOW CTL SYSTEM (23HB) (Ref. AMM TASK 21-51-51-000-001) and (Ref. AMM TASK 21-51-51-400-001).

R **ON A/C 004-049, 055-099, 101-149, 151-199, 201-299, 301-399,

 C. If the fault continues:
 - do the inspection of the delta P sense lines (Ref. AMM TASK 21-51-00-200-001).
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 301-399,
 D. If the fault continues:
 - do a check of the RELAY-L PACK CLOSE (13HB) and replace it if necessary (Ref. ASM 21-51/02).
 (1) If the fault continues:

 - do a check of the RELAY-L FCV DISAGREE (15HB) and replace it if necessary (Ref. ASM 21-51/02).

 (2) If the fault continues:

 - do a check of the BOARD-ANN LT TEST & INTFC (8LP) and replace it if necessary (Ref. ASM 21-51/02).

 (3) If the fault continues:

 - do a check of the PUSHBUTTON SWITCH-AIR COND/PACK 1 (7HB) and replace it if necessary (Ref. ASM 21-51/02).

 (4) If the fault continues:

 - do the operational test of the engine interface unit (1KS1) (Ref. AMM TASK 73-25-34-710-040).
 (a) If the test gives a different maintenance message refer to the Fault Symptom List.

 (5) If the fault continues:

 - do a check of the RELAY-ENGINE 1 START (17HB) and replace it if necessary (Ref. ASM 21-51/02).

 (6) If the fault continues:

 - do a check of the RELAY-RAM AIR CLOSE CTL (3HZ) and replace it if necessary (Ref. ASM 21-51/02).

 (7) If the fault continues:

 - do a check of the RELAY-ENGINE 2 START (16HB) and replace it if necessary (Ref. ASM 21-51/02).

 (8) If the fault continues:

 - replace the CONTROLLER-PACK 1 TEMP (7HH) (Ref. AMM TASK 21-61-34-000-001) and (Ref. AMM TASK 21-61-34-400-001).
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 001-049, 051-099, 101-149, 151-199, ∞∞21-51-00∞∞∞∞∞∞∞∞∞∞Page 210
 201-299, 301-399, Aug 01/05 CES

 E. If the fault continues:
 - do a check and repair the wiring (Ref. ASM 21-51/01) between:
　
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