SASless, from post 1420 on the 'other' thread:
FWJ. I don't have the RFM in front of me so this will (hopefully) be a correct interpretation! I am sure it will be corrected by someone if I get it wrong
The drill covers both a MGB Oil Px CAUTION and an MGB Oil Px WARNING - one yellow, the other red.
1. If MGB Oil Px WARNING then select BYP (this is a MGB oil cooler bypass switch)
2. If MGB Oil Px CAUTION with px above 35 psi
Land as soon as PRACTICAL
3. If MGB Oil Px WARNING, or MGB Oil Px CAUTION with px below 35 psi
Descend MSA
Start APU
Land as soon as POSSIBLE
However if there are secondary indications, which are:
Oil px indicating below 5 psi
Smoke or fumes
Hydraulic failure
Increased power required
Unusual noise or vibration
LAND IMMEDIATELY
VL