is located on the left side of the instrument panel and provides caution (amber) and warning (red) messages for selected portions of the airplane systems. The annunciator is designed to flash messages for approximately 10 seconds to gain the attention of the pilot before changing to steady on. The annunciator panel cannot be turned off by the pilot. Fuel L/R is triggered when less than 5 gallons and remains for 60 seconds Low Voltage if Voltage is Negative on AMMETER (Discharge) Each fuel tank also incorporates warning circuits which can detect low fuel conditions and erroneous transmitter messages. Anytime fuel in the tank drops below approximately 5 gallons (and remains below this level for more than 60 seconds), the amber LOW FUEL message will flash on the annunciator panel for approximately 10 seconds and then remain steady amber. The annunciator cannot be turned off by the pilot. If the left tank is low, the message will read L LOW FUEL. If the right tank is low, the message will read LOW FUEL R. If both tanks are low, the message will read L LOW FUEL R. Illumination of "VOL TS" on the annunciator panel may occur during low RPM conditions with an electrical load on the system such as during a low RPM taxi. Under these conditions, the annunciator will go out at higher RPM. The I master switch need not be recycled since an overvoltage condition has not occurred to deactivate the alternator system. In addition, a separate low oil pressure indication is provided through the panel annunciator. This annunciator is wired to a pressure switch located on the rear of the engine accessory case. When oil pressure is below 20 PSI, TST DIM or BRT positions (earlier serial number airplanes) TEST or the DAY or NIGHT positions (later serial number airplanes). \ All amber and red messages will flash until the switch is released. The low voltage warning annunciator is incorporated in thel annunciator panel and activates when voltage falls below 24.5 volts. If low voltage is detected, the red annunciation VOL TS will flash for approximately 10 seconds before illuminating steadily. The pilot cannot turn off the annunciator. In the event an overvoltage condition occurs, the alternator control unit automatically opens the ALT FLO circuit breaker-,I removing alternator field current and shutting off the alternator. Theil battery will then supply system current as shown by a discharge rate on the ammeter. Under these conditions, depending on electrical system load, the low voltage warning annunciator will illuminate when system voltage drops below normal. The alternator control unit may be reset by resetting the circuit breaker. If the lo~ voltage warning annunciator extinguishes, normal alternate charging has resumed; however, if the annunciator illuminate again, a malfunction has occurred, and the flight should b terminated as soon as practicable. lighting intensity for the avionics displays and the NAV indicators (pilot's panel) is controlled by the annunciator panel test switch. When the switch is in the BRT position (earlier serial number airplanes) or the DAY position (later serial number airplanes), this lighting m f output of the left pump falls below 3.0 in. Hg., the amber L VAC message will flash on the annunciator panel for approximately 10 seconds before turning steady on. If output of the right pump falls below 3.0 in. Hg., the amber VAC R message will flash on the annunciator panel for approximately 10 seconds before turning steady on. If output of both pumps falls below 3.0 in. Hg., the amber L VAC R message will flash on the annunciator panel for approximately 10 seconds before turning steady on