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EICAS STATUS MESSAGES
None
PLACARD
As appropriate
MAINTENANCE (M)
For dispatch with the complete TCAS system inoperative, deactivate and secure the system by opening and collaring the TCAS circuit breaker.
OPERATIONS (O)
Monitor the operative indications and advisories and respond as appropriate.
 
EICAS STATUS MESSAGES
None
PLACARD
Near EICAS - O2 PRES INDICATION INOP
MAINTENANCE (M)
When dispatching with the Pressure Indication System (EICAS) inoperative:
 Verify that crew oxygen cylinder shutoff valve is open.
 Determine crew oxygen system pressure by reading the pressure gage at the crew oxygen cylinder (bottle) in the forward cargo compartment.
 Determine the ambient air temperature in the forward cargo compartment at the crew oxygen cylinder. This temperature can be estimated by the personnel checking the system pressure. It is assumed that the temperature of the oxygen in the bottle is stabilized to the same temperature as the ambient air. If this is not true, either wait 10 to 15 minutes for stabilization to occur, or measure the temperature of the oxygen cylinder directly.
 Contact dispatch to determine required oxygen bottle pressure.
NOTE: Oxygen bottle(s) minimum required pressure for dispatch is available in OM-B Vol 3.
 Compare the measured pressure with the required pressure. Ensure pressure is sufficient for dispatch.
 
CREW OXYGEN CYLINDER INSTALLATION
OPERATIONS (O)
When dispatching with the Oxygen Thermal Relief Indicator damaged or missing, verify that oxygen pressure is adequate for dispatch:
 Select EICAS status page; note oxygen pressure.
 Select 100% on the NORMAL/100% switch.
 Push down and hold the RESET/TEST SLIDE lever.
 Observe yellow cross appears momentarily in FLOW indicator.
 Push and hold the EMERGENCY/TEST selector.
 While holding RESET/TEST SLIDE lever down, push EMERGENCY TEST selector and observe yellow cross appears in FLOW indicator.
 Observe oxygen pressure did not decrease during test.
 
EICAS STATUS MESSAGES
None
PLACARD
As appropriate
 

 
EICAS STATUS MESSAGES
None
PLACARD
As directed in Maintenance (M) procedure
MAINTENANCE (M)
Passenger Service Units (PSU) Inoperative:
 Close the inoperative PSU door(s) and secure it using adhesive tape.
 Rope, tie, tape or otherwise block the passenger seat(s), flight attendant seat and lavatory door(s) serviced by the inoperative PSU(s).
 Placard the blocked off seat(s) or lavatory(s) - NOT TO BE OCCUPIED. Automatic Presentation System Inoperative:
 Check passenger oxygen system manual deploy per AMM 35-21-00, Passenger Oxygen System - Adjustment/Test.
 With only automatic deploy system inoperative, placard near upper EICAS screen - PASS OXY - AUTO MODE INOP.
　
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