Annunciators Flashcards
L/R HYD pressure
Pump failure of low HYD pressure
Cabin Door
Illuminates with indication of any of the micro switches of any of the door sensor bayonets are not locked into place
L / R ENG FIRE
Detection of an overheat sensor situation illuminates cockpit warning lights on the annunciator panel and on the fire extinguisher control assembly.
There are overheat detectors for the engines and wings and fire extinguishers inside the engine nacelles.
The fire extinguishers are discharged from the cockpit. During preflight, the pressure gage for each fire extinguisher bottle should be checked.
Low Suction
Indicates suction dropped below normal 4.4 HG
Pilot monitor the vacuum system by:
- A suction indicator on the instrument panel and
- an amber LOW SUCTION annunciator light
Bleed air is routed through an air ejector to provide vacuum for pressurization control, deice boot deflation, and some instrument operation.
L / R Wing Overheat
Steady: Temperature exceeding 350°F in the wheel well or 450° in the air-conditioning duct.
Flashing: Temperature exceeding 250°F in the wing leading edge - generator wires
Bleed air off, Gen Off
There are overheat detectors for the wings
Detection of an overheat situation illuminates cockpit warning lights on the annunciator panel
L/R Bat Disconnect and BATT FAULT
• current imbalance in a battery feeder line is sensed, both batteries are disconnected by the battery fault detector.
The BATTERY FAULT annunciator and both BAT DISC lights illuminate to indicate a battery fault has been detected and that both batteries are disconnected.
*Two conditions must be met for the battery fault detection circuit to be operative.
- At least one battery must be on
- and both generators on
Attempt to get the batteries back on line:
- pressing both battery switches to OFF,
- then alternately pressing each battery switch to RESET, then to ON
Wiring must be monitored from input end to output end. The purpose of the fault detection system is to verify that the current provided by the source is delivered through the wires to the load.
L/R Oil Pressure
Oil pressure is below 40 psi
SAS Fault
▪ Steady: SAS computer power has failed or that power has failed in combination with servo failure.
On the ground, the SAS vane has deflected full up. Check SAS indicator needle.
▪ Flashing: SAS servo or servo clutch has failed.
Action SAS - off
Cargo Door
Cargo Door
L/R Gen Fail
The L or R Generator Fail light will illuminate whenever the respective generator relay is disconnected (open).
It can be reset and selected on to attempt to close
the relay. If it will not connect after being reset, no further action is possible
L/R AC Bus
AC Bus light indicates power lost
Illumination of 1 AC BUS warning light is usually an indication that the 115-VAC bus-tie circuit breaker has opened.
Illumination of both warning lights is usually an indication of an inverter failure, and the other inverter should be selected.
The AC warning and monitoring system includes a bus selectable voltmeter on the left console and two bus failure warning lights on the annunciator panel. The AC voltmeter can be selected to monitor either the left or the right 115-volt bus. If power to either 115-VAC bus is lost, the respective AC BUS warning light illuminates to alert the pilot.
There is no way to monitor the health of the 26-VAC bus
Cabin Altitude
Cabin altitude light indicate
Cabin altitude pressure has exceeded 10,000 ft
L/R chip detector
Indicates metal chips in engine
Anti skid
Anti skid
L/R SLR off
SRL computer is not operating. Normal with less than 80% rpm
