Low cost man machine interface items
Hi,
Cameras should exist where you need a good view of important "sectors". You have it underneath.
Could be "outside" MEL and are CHEAP.
Mac
PS
Cameras would save Discovery (leading edge tiles damage), would help JAL 123 crew, etc. Could be pan and zoom capable.
I saw it installed in SAA A340-600.
PS2
On top (of high wing A/C) could had help UTair ATR72 crew