PIPER AIRCRAFT
PA-42-720(AdvancedTrainer)
MAINTENANCEMANUAL

B. AnnunciatorPanel (continued)
CHART 2 (Sheet 3 of 3)
ANNUNCIATOR PANEL FUNCTIONAL TEST

ANNUNCIATION  PROCEDURE
Inverter Inoperative  Activate inverter no. 1 and 2 circuit breakers (on Left Main and Essential bus). Activate avionicsmaster switch, select inverterno. 1 switch position, and ensure light goes out. Repeat process for inverter no. 2 switch position. Pull no. 1 and 2 circuit breakers alternately, while in appropriate inverter switch position, and observe inverter inoperative annunciation.
Electric Trim  Collins APS-65. On the pilot's control wheel, push the left side of the trim switch down and the right half up. Trim must fail in one second, coinciding with activation of trim annunciator and master warning horn and light. Repeat test using switches on copilot's wheel. Pull electric trim circuit breakeron left hand breaker panel and the electric trim annunciator light and masterwarning horn and annunciator must activate.
Wing Flap Annunciation  Locateflap system test switch on lower instrument panel. Move flap
°

selector handle fully DOWN and when flaps reach approximately 10, activate test switch. Flap extensionmust stop and flap caution annunciator light (amber) must come on. Release switch;ensure light goes out and flaps continuedown.
Fail Autofeather andArm Refer to AutofeatherGround Operational Check in 61-20-00. AutofeatherAnnunciation
Stall Warning Annunciation  Referto Functional Test of systems in 27-30-00.
Cabin Press. Annunciation Refer to Pressurization Check with Test Unit, 21-30-00.
Gear Warn Annunciation  Refer to Position and Waming, 32-60-00.
Fuel Pressure Annunciation  Refer to Test of Automatic Fuel Pump System, 28-40-00.
Check with Test Unit, 21-30-00. Bleed Air Off Annunciation  
Refer to Pressurization Emergency Pressure  With right hand engine operatingat 70% Ng or less, position ECS selector
Annunciation  switch to emergency position. The emergency pressure light on the cabin comfort control panel must come on.
NOTE: Do not operate right hand engine on the ground at power settings over 70% Ng, with the ECS selector switch in the emergency position. This could produce bleed air overtemperature
conditions.
q-SensorOverride Refer to test procedure for q-sensor in 34-10-00. Annunciation
ECSOvertemperature Refer to procedure specifiedin 21-40-00. Annunciation
EFFECTIVITY:

Jan10190O
31-50-00
PIPER AIRCRAFT
PA-42-720 (Advanced Trainer)
MAINTENANCE MANUAL

B. AnnunciatorPanel (continued)
CHART 3
GROUND OPERATIONAL CHECK OF ANNUNCIATOR PANEL

ANNUNCIATION  PROCEDURE
Thesecheck are made with both engines at idle and during engine shutdown.
GroundBleed  When starting engines, ensureeach BLEED AIR OFF annunciator light comes
Annunciations  on. When engines are running, lights must go out, but come back on whenever the bleed air switches or the ECS switch are in the OFF position. After engine start, set brakes and position left and right bleed air switches to the LO position, and ECS select switch to GND. With engine power levers at ground idle, ensure left and right GROUND BLEED (amber) annunciator lights are on. Advance power levers slowly, and at 70 to 75% Ng, ensure lights go out. Advance engine power levers to 80% Ng, slowly retard power levers,and ensure lights come on again at 65 to 70% Ng.
Generator Off With both engines at idle, place left (or right) starter generator switch in gen-Annunciation erator position. Ensure respective GENERATOR OFF light (amber) goes out.
Ice Door Annunciation  Activate left (or right) ice door switch and ensure respectiveicedoor light (green)come on. Activate switch to close door and ensure light goes out.
Oil Pressure Annunciation  During shutdown of left (or right) engine, respective pressurelight, master warninghorn, and light must come on as oil pressure passes 60 psi on dual oil pressure/temperature
gauge.

EFFECTIVITY:

040-999
31-50-00Jan
PIPER AIRCRAFT
PA-42-720 (Advanced Trainer)
MAINTENANCE MANUAL

CHAPTER 32

LIST OF EFFECTIVE PAGES

CHAPTER  CHAPTER 
SECTION  PAGE  DATE  SECTION  PAGE  DATE 
32-EFFECTIVITY  1  Jan 10/90  32-30-00  1  Jan 10/90 
32-EFFECTIVITY  2  Jan 10/90  32-30-00  2  Jan 10/90 
32-CONTENTS  1  Jan 10/90  32-30-00  3  Jan 10/90 
32-CONTENTS  2  Jan 10/90  32-30-00  4  Jan 10/90 
32-CONTENTS  3  Jan 10/90  32-30-00  5  Jan 10/90 
32-CONTENTS  4  Jan 10/90  32-30-00  6  Jan 10/90 
　
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