FW, не совсем так
Если был отказ замка - это отказ уборки, это о другом - там логика отличается.
Речь идет про выпуск, и никакой блокировки выпуска "второй" ноги не будет:
L/G Extension Sequence
When the calculated airspeed decreases to 260 kt or less, the ADIRUs
will function. This lets a valve open signal to the safety valve
when you make a DOWN selection. The safety valve then opens and
connects the L/G system to the Green system hydraulic pressure.
With the L/Gs up and locked and the doors closed and locked, on
selection of L/G DOWN, the LGCIU will:
Соответственно, если какой-то замок говорит что он не "locked" то и последовательность выпуска не инициируется. Тут и спорить не о чем, хотя этот отказ скорее всего проявится при уборке и створки не закроются.
(a) Signal the doors to open.
(b) When all the doors are fully open:
- signal the L/G to extend
- hold the door open signal to keep the door open-line
pressurized.
То-есть если не пойдет одна нога с замка - то система не будет ничего делать и спокойно будет "ждать" выпуска остальных
(c) When all the L/Gs are down and locked:
- signal the doors to close and pressurize the lockstay actuating
cylinder.
(d) As the first door moves from the fully open position:
- cancel the L/G extend signal.
(e) Maintain the doors closed signal and the L/G lockstay actuatingcylinder
pressurized
А вот если хоть одна нога не встала на замок - створки не закроются.
(3) Sequence Control
The sequence control is such that:
- it is not possible to move the L/G unless all the doors are fully
open
- it is not possible to close the doors unless all the L/Gs are
locked in their selected position.
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
А вот это то, что система мониторит.
With the L/Gs locked up and the doors locked closed, the doors will
not be signalled to open if a door becomes unlocked. This is only if
the control lever is selected to the UP position.
(4) LGCIU Control
Only one LGCIU controls the operation of the system at any one time.
The LGCIU in control is the Active unit and the unit not in control
is the Standby unit. Each LGCIU has a non-volatile random access
memory (NOVOL RAM) which makes a record if it was Active or
Standby at the last retraction and extension sequence. Control of
the L/G system automatically changes from one LGCIU to the other
when:
- the L/G control lever is moved away from the DOWN position
- a failure occurs in the Active LGCIU.
Each LGCIU sends a status signal to the other whether it is Active
or Standby. It also sends position and status data to other
aircraft systems. If one LGCIU fails, it sends a Standby status
signal to the other LGCIU. The serviceable LGCIU becomes Active, if
it was not already, and stays Active for all the subsequent control
sequences.
If a failure occurs in an LGCIU that does not affect the control of
the system, the LGCIU can still be Active. The failure is stored in
the NOVOL RAM.