(b)  
Push the LSK that is adjacent to START TEST>.

 NOTE: IN PROGRESS shows during the test.
____
 S 715-043
 (2)  When IN PROGRESS goes out of view, look for PASS or FAIL> adjacent to <FWD CARGO OVBD.
 NOTE: If a PASS indication shows, no failures occurred during the
____
 test.

 (a)  If FAIL> shows: 1) Push the LSK that is adjacent to FAIL> to see the GROUND TEST MSG pages for the failure. 2) Push the NEXT PAGE key until you find all the GROUND TEST MSG pages. 3) Make a list of all CMCS messages, CMCS message numbers, and ATA numbers that show on the GROUND TEST MSG pages.
 4)  Go to the CMCS Message Index of the Fault Isolation Manual (FIM) to find the corrective action for each CMCS message.
 F.  Put the Airplane in Its Usual Condition
 S 865-044
 (1)  
Set the GND TESTS switch to the NORM position.

 S 865-045

 (2)  
Remove the electrical power if it is not necessary
 (AMM 24-22-00/201).

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 TASK 21-26-00-705-046
 3. Lower Cargo Ventilation Fans - Ground Test
__________________________________________
 A. General
 (1)  This test will do a check of the forward, aft, and bulk cargo fans in the lower cargo compartment.
 B. References
 (1)  AMM 24-22-00/201, Manual Control
 C. Access
 (1)  Location Zones
 221 Control Cabin, LH
 222 Control Cabin, RH

 D. Prepare for the Test
 S 865-047
 (1)  
Supply electrical power (AMM 24-22-00/201).

 S 865-048

 (2)  
Make sure the engines are off.

 S 865-049

 (3)  
Make sure the LOWER LOBE CARGO COND AIR FLOW RATE selector on the P461 panel is in the OFF position.

 S 865-050

 (4)  
Make sure the packs are off.

 S 865-051

 (5)  
Make sure the forward cargo and aft cargo VENT FANS switches on the P86 and P59 panels, respectively, are in the OFF position.

 S 865-052

 (6)  
Set the GND TESTS switch on the overhead maintenance panel, P461, to the ENABLE position.

 S 865-053

 (7)  
Prepare the CDU for the test:

 (a)  
Push the MENU key on the CDU to show the MENU.

 (b)  
Push the line select key (LSK) that is adjacent to <CMC to show the CMC MENU.

 (c)  
If <RETURN shows after you push the LSK, push the LSK that is adjacent to <RETURN until you see the CMC MENU.

 (d)  
Push the LSK that is adjacent to <GROUND TESTS to show the GROUND TESTS menu.

 (e)  
Push the NEXT PAGE key until you find <21 AIR CONDITIONING.

 (f)  
Push the LSK that is adjacent to <21 VENTILATION SYSTEM to show the GROUND TESTS menu for the ventilation system.

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747-400 MAINTENANCE MANUAL
 (g)  Push the NEXT PAGE key until you find <LOWER CARGO VENT.
 NOTE: If INHIBITED shows above <LOWER CARGO VENT the test
____
 will not operate.

 (h)  If INHIBITED shows above <LOWER CARGO VENT 1) Push the LSK that is adjacent to the test prompt. 2) Do the steps shown on the CDU. 3) Push the LSK that is adjacent to <RETURN to show the ground
 test menu again.
 E.  Lower Cargo Vent Fan Ground Test
 S 865-054
 (1)  Push the LSK that is adjacent to <LOWER CARGO VENT.
 (a)  
　
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