SPYDER FSS SYSTEM

Fire detection is provided by what type of sensors are in the N2 protected areas? (1.40.1) (p 1-1055)

Thermal

Each dewar has a capacity of? (1.40.4) (p 1-1057)

750 lbs

Where does N2 discharge? What is the N2 capacity & storage arrangements? (1.40.4) (p 1-1057)

Discharges in unmanned areas only; capacity of 750 lbs per dewar; 2 dewars per airplane

The automatic nitrogen discharge function is activated when any one of the four Engine Start switches is in \_\_\_\_\_ or \_\_\_\_\_ and the CPU receives signals from the engine nitrogen FSS automatic discharge relays. (1.40.4.1, p 1-1058)

RUN; START

Which zones have automatic nitrogen discharge capability? (1.40.4.1, p 1-1058)

Left Outboard Wing (Zone 1)

Left Inboard Wing (Zone 2)

Right Inboard Wing (Zone 3)

Right Outboard Wing (Zone 4)

Can you manually discharge nitrogen into zone 5 while it is being automatically discharged into zone 4? (1.40.4.1, p1 -1058)

Yes

In zones 1-4, what will happen if a second auto discharge starts while the first one is still discharging? (1.40.4.1., p 1-1058)

The second automatic zone will discharge N2 for the remaining time of the first zones 45 second time period. At the conclusion of that cycle, the second zone will then start up its own auto 45 second cycle.

Can you simultaneously discharge in zones 1 through 4? What about zones 1 through 4 AND one zone within 5 through 12? (1.40.4.1, p 1-1058)

Yes; Yes

What indications do you have when a fire has been detected? (1.40.4.2, p1-1061)

FSS FIRE Warning CWA displayed on the MFDU, a MASTER CAUTION annunciation, and an audible alert

If more than one zone detects a fire, what is the priority system of zones 5-12? (1.40.4.2, p 1-1059)

There is a priority system for zone 5-12 alarm pushbuttons. Depressing any of these pushbuttons to the right or below a pushbutton that was previously depressed will cancel out the previous signal

Describe the priority system of the zone alarm pushbuttons? (1.40.4.2, p 1-1059)

Zones 1 - 4 are not part of the priority system → when a fire is sensed in any of these zones an auto-discharge occurs

Zones 5 - 12 right and down has higher priority, but 5-12 have no priority effect on zones 1 - 4

Simultaneous discharge can occur in zones 1 thru 4 as well as 1 thru 4 and one zone in the 5 - 12 range

In zones 5 thru 12, N2 must be manually discharged and will only occur in a single zone at a time in the 5 - 12 range

If a zone discharge in zones 5 - 12 has been started manually and subsequently a zone alarm light goes on in one of the zones 1 through 4, how long will it discharge? (1.40.4.2, p 1-1060)

Zones 1 - 4 will auto-discharge and then continue to discharge for the remainder of initial timer started by zones 5-12; it must subsequently be discharged manually for further operation.

What if you accidentally hit a wrong, higher priority FSS button? (1.40.4.2, p 1-1060)

Place arming switch to PANEL SAFE then to ARM, then press correct button

Which zone button located on the nosewheel well FSS panel in not operable? (1.40.4.2, p1-1060)

CARGO CTR WING AVIONICS

Does the battery need to be on to discharge N2 from the nosewheel well FSS panel? Why? (1.40.4.2, p 1-1060)

No; It is hot-wired to the hot battery bus when the FSS arming switch in the nosewheel well is in the POWER/ARM position

How many total FSS zones are there? (1.40.4.2, p 1-1060)

Twelve

What is the elapsed discharge time from the Engineer's FSS panel? Nosewheel FSS panel? (1.40.4.2, p 1-1060)

45 seconds; continuous

What areas are protected by the pushbuttons on the nosewheel well FSS panel? (1.40.4.2, p 1-1061)

Left wing, right wing, underfloor forward, underfloor aft

How many nitrogen dewars are on the C-5M? (1.19.4.1) (p 1-249)

2 (located in the wing roots aft of the rear wing beam)

What is considered as "fully serviced" N2? \_\_\_\_pounds (AFMAN 11-2C-5V3, 3.13, p 63)

650 lbs / DEWAR minimum