Hi all,
I hope some of you could shed some light on this for me. I have a question regarding the the MEL Operational Procedure for one Air Pack Inop. I had an aircraft dispatched with an MEL item of AIR PACK 1 INOP and after going through the MEL I came across the Operation Procedure as follow.
DURING COCKPIT PREPARATION PACK FLOW selector.................................................... ............................................................ .....HI
IN FLIGHT If BLOWER pb-sw and EXTRACT pb-sw are set to OVRD: ‐ The cabin altitude may reach about 9 700 ft, and ‐ The CAB
PR EXCESS CAB ALT alert may be displayed on the EWD
DURING DESCENT At 10 000 ft, if engine anti-ice (side with PACK pb-sw OFF) is available:
ANTI ICE ENG (side with PACK pb-sw OFF) pb-sw.......................................................... ...ON
My question is, during descent at 10,000 ft, what is the reason to switch on the Engine Anti Ice on the same side of the Inoperative Air Pack? Is this going to be a asymmetrical engine anti ice operation? What is the benefit from doing this? Or I may have misunderstood the procedure completely.
Your input is much appreciated!
Subria