(h)  
Install a jumper between pins 9 and 10 at the regulator.

 (i)  
Measure the voltages between these pins at the regulator: 1) Pins 5 and 6 measure 0 | 2 VDC. 2) Pins 6 and 7 measure 28 | 5 VDC.

 (j)  
Make sure these lights are on: 1) The applicable BLEED TRIP OFF on the P5-10 panel. 2) The MASTER CAUTION (2 locations) on the P7 glare shield. 3) The AIR COND annunciator on the P7 glare shield.

 (k)  
Put the LIGHTS switch, on the P2 panel, to the DIM position.

 1)  Make sure these lights become dim: a) The applicable BLEED TRIP OFF on the P5-10 panel. b) The MASTER CAUTION (2 locations) on the P7 glare
 shield. c) The AIR COND annunciator on the P7 glare shield.
 (l)  Put the LIGHTS switch, on the P2 panel, to the BRIGHT position.
 1)  Make sure these light become bright: a) The applicable BLEED TRIP OFF on the P5-10 panel. b) The MASTER CAUTION (2 locations) on the P7 glare
 shield. c) The AIR COND annunciator on the P7 glare shield.
 (m)  
Push and release one of the two MASTER CAUTION lights. 1) Make sure the MASTER CAUTION light goes off. 2) Make sure the AIR COND annunciator light goes off. 3) Make sure the applicable BLEED TRIP OFF light stays on.

 (n)  
Push and release one of the two MASTER CAUTION lights. 1) Make sure the MASTER CAUTION light comes on. 2) Make sure the AIR COND annunciator light comes on.

 (o)  
Remove the jumper between the pins 9 and 10 at the regulator.

 (p)  
Push and release the TRIP RESET switch.

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 (q)  
Measure the voltages between these pins at the electrical connector for the regulator. 1) Pins 5 and 6 measure 28 | 5 VDC. 2) Pins 6 and 7 measure 0 | 2 VDC.

 (r)  
Make sure these lights are off: 1) The MASTER CAUTION (2 Locations) on the P7 glare shield. 2) The AIR COND annunciator on the P7 glare shield. 3) The applicable BLEED TRIP OFF light on the P5-10 panel.

 (s)  
Put the applicable ENGINE FIRE switch to the ON position.

 (t)  
Measure the voltages between these pins at the electrical connector for the regulator: 1) Pins 5 and 6 measure 0 | 2 VDC. 2) Pins 6 and 7 measure 28 | 5 VDC.

 (u)  
Put the applicable ENGINE FIRE switch to the NORMAL position.

 (v)  
Measure the voltages between these pins at the electrical connector for the regulator: 1) Pins 5 and 6 measure 28 | 5 VDC. 2) Pins 6 and 7 measure 0 | 2 VDC.

 (w)  
Install a jumper between the pins 1 and 2 at the applicable Bleed Air Overheat switch.

 (x)  
Make sure these lights come on: 1) The applicable BLEED TRIP OFF on the P5-10 panel. 2) The MASTER CAUTION (2 locations) on the P7 glare shield. 3) The AIR COND annunciator on the P7 glare shield.

 (y)  
Measure the voltages between these pins at the electrical connector for the regulator: 1) Pins 5 and 6 measure 0 | 2 VDC. 2) Pins 6 and 7 measure 28 | 5 VDC.

 (z)  
Remove the jumper between the pins 1 and 2 at the Bleed Air

 Overheat switch.
 (aa) Push and release the TRIP RESET switch.
 (ab) Make sure these lights go off:

 1) The applicable BLEED TRIP OFF on the P5-10 panel. 2) The MASTER CAUTION (2 locations) on the P7 glare shield. 3) The AIR COND annunciator on the P7 glare shield.
 (ac) Measure the voltages between these pins at the electrical connector for the regulator: 1) Pins 5 and 6 measure 28 | 5 VDC. 2) Pins 6 and 7 measure 0 | 2 VDC.
 S 735-077
 (4) Do the procedure again for the other engine if it is necessary.
 G. Put the Airplane Back To Its Usual Condition
 S 865-164
 (1)  
Connect all of the electrical connectors you disconnected.

 (2)  
Install the access panels for the applicable strut.

 S 415-079
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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