Piper Aircraft Corporation Malibu Mirage PA-46-350P, Airplane Maintenance Manual

Page: 765 / 1956

PAGE 1
Feb 28/07 4C7
31-50-00
PIPER AIRCRAFT, INC.
PA-46-350P, MALIBU MIRAGE
MAINTENANCE MANUAL
CENTRAL WARNING SYSTEMS
1. Annunciator
The annunciator panel is located in the upper center section of the instrument panel and consists of a
group of warning lights as follows: (shown with optional equipment).
ALTERNATOR NO. 1 INOP When either alternator fails or is selected OFF, the appropriate
ALTERNATOR NO. 2 INOP annunciator light will illuminate.
ANNUNCIATOR INOP Illuminates if the annunciator fail relay switch is faulty and/or the ANNUN
circuit breaker trips.
BOOST PUMP Illuminates when the fuel boost pump in the tank being used fails to
generate sufficient pressure. In normal operation, will also illuminate
briefly when switching tanks. Neither BOOST PUMP will function when
the fuel selector is set to OFF or is positioned between the LEFT and
RIGHT detents.
CABIN ALTITUDE Illuminates if cabin pressure altitude exceeds 10,000 feet.
DOOR AJAR Illuminates if either the forward baggage door or the cabin door is not
closed and latched.
FLAPS Illuminates when the flap motor protection circuit breaker trips.
FUEL PRESS Illuminates when the engine-driven fuel pump fails to generate sufficient
pressure.
FUEL IMBALANCE S/N’s 4636021 and up. Illuminates if a fuel quantity difference of greater
than 10 gallons is detected for more than 60 seconds between the left
and right tanks. Remains lighted until the imbalance is corrected.
GEAR WARN On the ground - illuminates when the landing gear selector is placed in
the UP position with the aircraft weight still on the gear.
In the air - illuminates when the gear is in transit; when all three gear are
not fully down and locked, or when the gear is not fully UP but the gear
doors are closed; when the throttle is reduced below 14 inches of
manifold pressure and the landing gear are not in the DOWN position; or
if the flaps are extended more than 10° and the landing gear are not in
the DOWN position.
HYDRAULIC PUMP Indicates the hydraulic pump is being supplied with electrical power.
Normally illuminated only during landing gear operation.
ICE DETECT FAIL S/N’s 4636132 thru 4636313 only. Illuminates if a fault develops in either
the ice detection sensor or controller.
LOW BUS VOLTAGE Illuminates when system voltage drops below 25 ± 0.3 Vdc. Normally on
when just the airplane’s battery or an external 28 Vdc battery is used for
electrical power.
OIL PRESS Illuminates if oil pressure is below 24 PSI. As oil pressure drops, there
may be as much as an 8 PSI lag (dead band) before the light comes on.
OXYGEN Illuminates whenever one of the oxygen generators has been activated.
Remains lighted until the expended oxygen generator(s) is/are replaced.