Hi Guys,
Need some help understanding something regarding PTU and when it is inhibited.
I am reading the airbus diagram in the FCOM, and the AND/OR/AND drawing is hard to figure out.
My understanding is the PTU is inhibited no matter where you are if:
- park brake is on; and also when
- nws is in towing position
- cargo door is operated (+40secs)
I am trying to get someone to explain to me the other conditions to do with the nose shock absorber, and the eng master switches.
The scenario i am thinking is after an RTO, engine 1 failed, the ptu runs. After stopping captain sets the parking brake (PTU stops). Then ready to taxi in he releases the parking brake, however this time as 1 eng master is off, the PTU will still be inhibited and so we cannot taxi back in as the NWS is on the green system.
I may be going off on a tangent, if someone can explain it to me it would be great.
