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EMERG GEN connects. The APU will not start in-flight when on BAT only (this is
due to the DC BAT BUS being disconnected during Electrical Emergency
configuration above 100 kts.). Lights available in loss of all AC emergency are
Capt. instrument lights, F/O dome light (if on DIM or BRT) and compass/ice light
(PH 5.15.1).
US Airways Airbus A319, A320, A321 Notes
11
If any generator is operating at more than 100% rated load the GALY & CAB (or
GALLEY) pb will illuminate amber FAULT. You will be directed to select OFF
which will then load shed by offloading the main galley, secondary galley and the
in-seat power supply. In AUTO (normal blank) pb position the main galley (A319
& A320) or all galleys (A321) and inseat power supplies will automatically load
shed if in-flight with one generator operating or on the ground with only one
engine generator operating. If APU gen or EXT PWR is supplying power then all
galleys are powered.
Commercial pb (A321 only) when pushed will depower all commercial electrical
systems (Cabin & Cargo lights, Water & Toilet system, Drain mast ice protection,
Galley, Passenger entertainment).
Circuit breakers are color coded. Green are monitored by ECAM. All other colors
are not monitored. The ECAM will display C/B TRIPPED ON OVHD PNL (or
REAR PNL) if a green monitored breaker is tripped for more than a minute.
Yellow breakers are pulled during the procedure for flight on battery power only.
Red capped breakers are NEVER pulled in flight. Red caps are installed on the
wing tip brakes circuit breakers to prevent loss of flap asymmetry protection. All
circuit breakers have a letter (horizontal) and number (vertical) code.
When on the gate with normal APU or EXT PWR (AC established) the GEN 1 &
2 amber FAULT lights will normally be the only amber FAULT lights on in the
overhead panel (with packs ON). With packs OFF the GEN 1 & 2 amber FAULT
and the PACK 1 & 2 amber FAULT lights will be on.
When shutting down the APU and turning off BATTs allow 2 min. after APU
Green AVAIL light goes out to allow time for APU flap to close (PH 3.16).
Batteries must always be on when APU is running for fire protection.
Ain’t no magic when the electrons stop! Bottom line here, ya gotta have electrical
somehow! Make sure you have a GEN, EMER GEN or at least a BAT or your
sidestick just became a worthless piece of plastic!
US Airways Airbus A319, A320, A321 Notes
12
Fire Protection (TM 7.26.x)
Both engines and the APU each have two identical loops, A & B and a computer-
FDU (Fire Detection Unit). A fire warning is given when both loops reach the
proper overheat condition. If one loop fails the other loop is able to generate the
warning by itself. A fire warning is given if both loops fail within 5 seconds of
each other. There is a red disc on the aft fuselage to show thermal discharge for
the APU fire bottle. The engines each have two extinguishers, the APU one.
Engines have sensing elements in three sections; pylon nacelle, engine core and
fan section. APU has sensing element in APU compartment.
APU fire on ground will auto shutdown, blow extinguisher bottle, sound nose
wheel well horn and APU FIRE light will illuminate on external interphone panel.
APU fire in-flight must be manually shutdown (will not auto shutdown) and
extinguished. Note: APU will auto shutdown in air for other than fire (go figure).
The forward cargo compartment has two smoke detectors and the aft has four
(319,320). The 321 has four forward detectors and six detectors in the aft cargo.
In either case two loops. Agreement of two smoke detectors on a loop will give
warning. If one smoke detector fails the system remains operational on the
remaining detector. There is one extinguisher bottle for fore and aft
compartments with one nozzle forward and two nozzles aft. If cargo SMOKE is
warning is given an isolation valve will close and the extraction fan will stop.
Cargo smoke gives: CRC, Master Warn light and Cargo SMOKE light.
ENG fire test: (7 items – 4 reds) (PH 3.4.1, 8.2.1)
ENG 1 Test – press and hold
 ENG FIRE pb illuminated (red)
 SQUIB and DISCH lights illuminated (2)
 MASTER WARN illuminated (2) (red)
 CRC aural chime
 ENG 1 FIRE warning on E/WD (red)
 ENGINE page on SD
 FIRE light ENG 1 (on ENG panel) illuminated (red)
Repeat for ENG 2
APU fire test: (BAT only 2 items – 1 red, AC 6 items – 3 red) (PH3.3, 8.2.2)
APU FIRE Test – press and hold (APU will not shutdown during test if running)
US Airways Airbus A319, A320, A321 Notes
13
 APU FIRE pb illuminated (red) *
　
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