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conditions, power setting, etc., as time permits.
12.1.1 Immediate Action Items. Procedural steps preceded by an asterisk (*) are considered
immediate action items. Pilots shall be able to accomplish these steps without reference to the Pocket
Checklist (PCL).
12.1.2 Warnings, Cautions, and Advisories. Warnings, cautions, and advisories are displayed in the
cockpit on the LDDI, on the upper warning/caution/advisory lights panels, or on the lower right
caution lights panel. Certain cautions provide two indications: one on the LDDI and one on the lower
right caution lights panel.
Warnings, cautions, and advisories are categorized and are listed alphabetically by category in figure
12-1 together with cause, remarks, and corrective action. Potential cause(s) for the associated
warning/caution/advisory is indicated by a bullet (·) under the Cause/Remarks column. The categories
are as follows:
a. Warning Lights.
b. DDI Cautions and Caution Lights not associated with FCES or HYD cautions.
c. Flight Control Electronic System (FCES) Cautions.
d. Hydraulic System Cautions (HYD).
e. DDI Advisories.
f. Advisory Lights.
g. GPWS Voice Warnings.
DDI cautions and advisories are listed in CAPS. Warning, caution, and advisory lights are
distinguished by a box around the legend (e.g., ).
A1-F18EA-NFM-000
V-12-1 ORIGINAL
Where appropriate, voice aural warnings are listed in quotation marks with their respective warning
or caution. If a DDI caution or caution light starts with a single letter (for example L, R, P, or Y) that
letter is not used to place the caution alphabetically.
Emergency procedures associated with a warning light, DDI caution, or caution light are shown in
figure 12-1 and are not repeated in any other chapter in Part V.
Paragraphs with bullets indicate causes while paragraphs without bullets indicate remarks.
A1-F18EA-NFM-000
V-12-2 ORIGINAL
Warning Lights
INDICATOR · CAUSE / REMARKS CORRECTIVE ACTION
APU
FIRE
Warning Light
``APU Fire, APU Fire''
· Fire detected in the APU bay.
APU FIRE extinguishing system operates automatically
with WonW and must be manually activated
with WoffW. System activation secures fuel
to the APU, arms the fire bottle, and discharges the
bottle after a 10 second delay. Discharge is delayed
to allow the APU time to spool down before extinguishing
agent is introduced.
Since the fire extinguishing system requires 28 vdc
essential bus power, the fire bottle may not be discharged
if the BATT switch is turned OFF during
the 10 second delay time.
In flight or on ground ±
*1. APU FIRE light ± PUSH
*2. FIRE EXTGH READY light ± PUSH
On ground ±
*3. Throttles ± OFF
*4. Egress
DUAL
L BLEED
and
R BLEED
Warning Lights
(which do not go out)
²Bleed Air Left (Right),
Bleed Air Left (Right)²
· Bleed air leak detected in common ducting AND
the overheat condition still exists (e.g., automatic
BALD shutdown did not secure the leak).
If the L/R BLEED warning lights are out, the
overheat condition no longer exists. If displayed,
the L and R BLD OFF cautions indicate that the
corresponding primary bleed air shutoff valves are
commanded closed and are NOT indications of actual
valve position.
If the aft avionics cooling fan has been disabled, the
OFF/RAM position of the ECS MODE switch will
not energize the aft avionics cooling fan. In this
case, only limited avionics cooling is available using
ram air. With the AV COOL switch set to EMERG,
only the following essential avionics receive adequate
cooling: FCC A, one AHRS, and the right
transformer rectifier. All other avionics systems are
susceptible to failure or shutdown due to heat. Ambient
temperature significantly influences the rate
at which avionics systems fail.
Bleed air leak MSP codes: 953, 954, 955, 956, 957,
958, 959, 960, or 961 (code determines leak location).
*1. BLEED AIR knob - OFF (DO NOT CYCLE)
*2. Emergency oxygen green ring - PULL
If light(s) still on -
*3. Throttles - Minimum practical for flight.
4. Land as soon as possible.
If lights go out AND aft avionics cooling fan
NOT disabled -
5. Land as soon as practical.
If aft avionics cooling fan disabled -
5. Land as soon as possible.
In all cases -
1. Maintain altitude below 10,000 feet.
2. Maintain airspeed below 325 KCAS (300 to 325
KCAS optimum).
3. ECS MODE switch - OFF/RAM
4. AV COOL switch - EMERG
Once below 10,000 feet -
5. Consider removing mask and resetting
　
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