2.  
Check for malfunction in interconnecting cables.
— Note —

A short of the type described in Steps 3 and 4 will not cause permanent damage to the power supply, but will render the system inoperative.

3.  
Check that pins 1 and 3 of interconnecting cable are not reversed.

4.  
Using an ohmmeter, check for a short between Pin 1 and 3 of interconnecting cable. If a reading is obtained on the meter, the cable is shorted and must be replaced.

— CAUTION — WHEN DISCONNECTING THE POWER SUPPLY, ALLOW FIVE MINUTES OF BLEED DOWN TIME PRIOR TO HANDLING THE UNIT.
5.  
Check interconnecting cables for shorts.

6.  
Disconnect the output cables from the power supply outlets.

33-40-00 Page 33-9 Issued: April 1, 1997
7.  Use an ohmmeter to make the following continuity checks:
A.  Check for continuity between the connectors of each interconnecting cable by checking from Pin 1 to Pin 1, Pin 2 to Pin 2, and Pin 3 to Pin 3. If no continuity exists, the cable is broken and must be replaced.
— CAUTION — ANY CONNECTION BETWEEN PINS 1 AND 2 OF T H E INTERCONNECTING CABLE WILL DISCHARGE THE CONDENSER IN THE POWER SUPPLY AND DESTROY THE TRIGGER CIRCUITS.
B .  Check continuity between Pins 1 and 2, 1 and 3, 2 and 3 of the interconnecting cable. If continuity exists between any of these connections, the cable is shorted and must be replaced.
8.  
Check the tube socket assembly for shorts.

9.  
Disconnect the tube socket assembly of the anti-collision light from the interconnecting cable.

10.
Using an ohmmeter, check for continuity between Pin 1 of AMP connector to Pin 1 of tube socket. Pin 2 of AMP connector to Pins 6 and 7 of tube socket and Pin 3 of AMP connector to Pin 4 of tube socket. When making these tests, if no continuity exists, the tube socket assembly is broken and should be replaced.

REMOVAL OF STROBE POWER SUPPLY.
1.  
Remove the access panel in the baggage compartment to gain access to the power supply.

2.  
Disconnect the electrical plugs and make note of their placement to facilitate reinstallation.

3.  
Disconnect the other electrical leads and label them to facilitate reinstallation.

4.  
Remove the four screws securing the power supply to the plate and remove the supply.

INSTALLATION OF STROBE POWER SUPPLY.
1.  Secure the power supply to the plate with the four screws previously removed.
— CAUTION —
BEFORE APPLYING POWER, MAKE CERTAIN ALL ELECTRICAL CONNECTIONS ARE CORRECTLY MADE WITHOUT INTERCHANGING ANY LEADS .
2.  
Connect the electrical leads to the proper terminals. (Refer to the strobe power supply schematics in Chapter 91.)

3.  
Connect the electrical plugs (left wing, right wing) to corresponding receptacles.

4.  
Replace access panel on the fuselage in the baggage compartment.

5.  
Turn on master switch and strobe lights to ensure proper operation.

33-40-00 Page 33-10 Issued: April 1, 1997

C H A P T E R

N AV I G AT I O N
A N D
P I TOT / STAT I C

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CHAPTER 34 - NAVIGATION AND PITOT / STATIC 
TABLE OF CONTENTS / EFFECTIVITY 
CHAPTER/ SECTION  SUBJECT  GRID NO.  EFFECTIVITY 
34-00-00  GENERAL  2K6 
Description and Operation  2K6 
34-10-00  FLIGHT ENVIRONMENT DATA AND PITOT STATIC  2K9 
Vertical Speed Indicator Altimeter Airspeed Indicator Troubleshooting  2K9 2K9 2K9 2K10 
34-20-00  ATTITUDE AND DIRECTION  2K13 
Artificial Horizon Air Driven Artificial Horizon Electrically Driven Artificial Horizon Operational Limitations Troubleshooting  2K13 2K13 2K13 2K13 2K14 
Directional Gyro Air Driven Directional Gyro Electrically Driven Directional Gyro Troubleshooting Removal and Replacement  2K14 2K14 2K15 2K15 2K15 
Air Driven Gyros - Fitting Installation Procedure  2K16 
Magnetic Compass Adjustment Troubleshooting  2K17 2K17 2K18 
Turn Coordinator Troubleshooting  2K19 2K19 

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34-00-00 Page 34-5 Issued: April 1, 1997
GENERAL.
The instrument air system consists of pitot air and static air sources. The system supplies both pitot and static air pressure for the airspeed indicator, altimeter and vertical speed indicator. These instruments are face mounted.
DESCRIPTION AND OPERATION.
　
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