A320 protection

[JSF1]

Alternate law - you may or may NOT have the high/low speed stability....what failures would inhibit these stabilities? Im guessing its something to do with the FACs?
Ta

[Reiver]

speed stability

hi,
Alternate law without speed stability may occurr if you lose AD,s,IR,s or control of both elevators.
source A320 Professional Pilots guide.page 171.
Cheers

[Fr. Dougal]

Can anyone tell me where I could get a copy of the A320 Professional Pilots guide?
Thanks

[peacock1]

Good afternoon, Father!
Got mine in Transair Pilot shop.
Saucy expensive, 50 quid sterling, and have'nt read it much......
But glancing through it now, it looks pretty good.
243 pages.
Please get Mrs Doyle to make the tea...
You will, you will etc. !!!

[FlightDetent]

My instructor had me print FCOM 1.27.30 p2 FLIGHT CONTROLS LAW RECONFIGURATION schematic. It is not an easy read especially because subsequent text pages use different names for the various regimes.

The way I read it is that in ALT LAW, you can never have all protections. Some are lost. ALT LAW - REDUCED PROT (schematics) = ALT LAW (text)

• load factor - available
• pitch attitude - gone
• low & high speed stability - available
• bank - gone

ALT LAW - NO PROTECTION (schematics) = ALT LAW WITHOUT REDUCED PROTECTIONS (text) this in fact is understood as ALT LAW with even less protections than in REDUCED mode

• load factor - available
• all others - gone

In which case your question may be answered by the left most branch of the schematics

1. double ADR failure (2nd not self detected and/or speed/mach disagree)
2. triple ADR failure
3. duble SFCC slat channel fault
4. G+B HYD lost

this would be called ALT LAW with NO PROTECTIONS albeit, obviously, the g-load prot is still available.

FD.
(the un-real)

[IFixPlanes]

Originally Posted by FlightDetent

...FCOM 1.27.30 p2 FLIGHT CONTROLS LAW RECONFIGURATION schematic...

Ingo

[FlightDetent]

n.b. A321 marked items on Ingos schematics are also applicable for A319.