Depending upon environmental conditions, cabin and flight deck temperatures can rise quickly. If necessary, remove as many sources of heat as possible by:
• turning off all in-flight entertainment systems
• turning off all galleys
• closing all window shades to block sunlight.
After descent to safe altitude, increase airflow throughout the airplane by:
• opening both outflow valves
• opening the smoke evacuation port
• if heat becomes excessive, opening a cabin door 1 and a cabin door 5.
The PACK 1, 2, 3 non-normal checklist has been revised to accommodate the conditions of this anomaly.
Securing Main Deck Doors 1, 2, 4, or 5 In The Open Position
To accomplish the smoke removal procedure, main entry doors (as designated by the Captain) need to be secured in the partially open position as follows:
• ditching straps forward of doors 3 left and right can be used to secure door 2 or 4 without detaching strap from its compartment
• attach snap end of strap to door assist handle on AFT door frame, place door operating handle to vertical (12 o’clock position), secure handle with several loops, return strap through assist handle and tie as shown below
• pressure on the door maintains tension on the strap so it may be left unattended.
Note: If strap is not available, use any satisfactory item in the same manner to secure the doors.
Uit 747-441 Manual.
