(4)  
Open the access panels 3103R and 3105R.

 S 016-007

 (5)  
Open the access door 1103L.

 D. Do a Check of the EFIS Cooling System
 S 216-008
 (1)  Do these steps to do a check of the Captains EHSI and EADI:
 (a)  
Loosen the fasteners on the Captains EHSI and EADI.

 (b)  
Move the EHSI and EADI aft until you can see the air inlet and exit holes.

 (c)  
Do a check of the grilles for lint, tobacco stains and all unwanted material.

 NOTE:____You can clean the grilles with a moist cloth. When the grilles are clean, dry them with a dry clean cloth.
 S 216-009
 (2) Do these steps to do a check of the First Officers EHSI and EADI:
 (a)  
Loosen the fasteners on the First Officers EHSI and EADI.

 (b)  
Move the EHSI and EADI aft until you can see the air inlet and exit holes.

 (c)  
Do a check of the grilles for lint, tobacco stains and all unwanted material.

 NOTE:____You can clean the grilles with a moist cloth. When the grilles are clean, dry them with a dry clean cloth.
 S 216-010
 (3)  
Do a check of the flexible hoses behind the CRT box for the EFIS instrument.

 (4)
Make sure the air outlets found below the floor are not blocked.

 (5)  
Make sure the duct is attached correctly.

 (6)  
Do a check of the low flow sensor.

 (7)  
Make sure the fixed bleed opening is attached correctly.

 S 216-011
 S 216-012
 S 216-013
 S 216-032
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737-300/400/500MAINTENANCE MANUAL
 S 216-014
 (8)  Make sure the fixed bleed opening is clean.
 NOTE: You can remove the fixed bleed opening and clean it with
____
 detergent and water.

 S 216-015
 (9)  
Make sure the check valves are clean and are attached correctly (Ref 21-58-91/201).

 S 216-016

 (10)
 Do a check of the air cleaner (Ref 21-58-61/201).

 S 216-017

 (11)
 Do a check of the NORMAL and ALTERNATE fans.

 S 216-018

 (12)
 Make sure the duct which goes to the IRUs on the E3-5 shelf, is attached correctly.

 S 216-019

 (13)
 Make sure the duct which goes from the air cleaner to the equipment cooling exhaust plenum is not damaged.

 S 216-020

 (14)
 Make sure the duct which goes from the air cleaner to the exhaust plenum which cools the equipment is attached correctly.

 E. Put the Airplane Back to Its Usual Condition
 S 866-021
 (1)  Do this step if you need main electrical power for more than 20 minutes and the ambient temperature is more than 100°F (37.8°C):
 (a) Supply conditioned air to the cabin (Ref 21-00-00/201).
 NOTE: This supplies cool air to the electrical equipment.
____
 S 866-022
 (2)  Supply electrical power (Ref 24-22-00/201).
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. APLS WITH EFIS ú

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A 737-300/400/500MAINTENANCE MANUAL
 S 426-024
 (3)  Do these steps to install the EHSI and EADI for the Captain: (a) Install the EADI (AMM 34-22-21/401). (b) Install the EHSI (AMM 34-22-31/401). (c) Make sure these circuit breakers are closed: 1) NORM COOLING FAN CONT 2) ALT COOLING FAN CONT 3) L EFIS SYM GEN 4) L EFIS CONT PANEL 5) L EHSI 6) L EADI (d) Do a test of the EADI (AMM 34-22-21/401). (e) Do a test of the EHSI (AMM 34-22-31/401).
 S 426-025
 (4)  Do these steps to install the EHSI and EADI for the First Officer: (a) Install the EADI (AMM 34-22-21/401). (b) Install the EHSI (AMM 34-22-31/401). (c) Make sure that these circuit breakers are closed: 1) R EFIS SYM GEN 2) R EFIS CONT PANEL 3) R EHSI 4) R EADI (d) Do a test of the EADI (AMM 34-22-21/401). (e) Do a test of the EHSI (AMM 34-22-31/401).
　
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