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

Page: 949 / 1956

PAGE 3
Feb 28/07 5D7
34-20-00
PIPER AIRCRAFT, INC.
PA-46-350P, MALIBU MIRAGE
MAINTENANCE MANUAL
temperature compensated reference. If the battery capacity is greater than 50% and the built-
in-test monitors are valid, a green “TEST” LED on the connector end of the unit and the remote
test lamp will remain on as long as the unit is in test mode.
While in the remote activated built-in-test mode, the 28 Vdc output will maintain 0.24 ± 0.1
Amp at 24 ± 0.2 Vdc for 4.0 ± 1.0 seconds. Six seconds after remote activation, the 28 Vdc
output will time-out and drop to 24 - 0.1, + 0.5 Vdc and less than 0.1 Amp.
If the test light fails to illuminate as required during the test, one or more of the following
conditions may exist:
1 the power supply batteries are less than 50% charged;
2 the test lamp is burned out; or,
3 the power supply unit is defective.
To determine which condition(s) exist(s), first check the test lamp and then proceed to the
Capacity Test, below.
(2) Capacity Test.
Each twelve months, verify the B.F. Goodrich PS-834A Emergency Power Supply battery
capacity as follows:
(a) Required Equipment
Power Supply - variable, 0-32 Vdc @ 6.0 amps continuous output.
Voltmeter - Fluke 8050A or equivalent
Load Resistors - 100.0 ohm ± 2%, 10.0 W (28.0 V load)
- 13.0 ohm (or equivalent) ± 2%, 5.0 W (5.0 V load)
(b) Procedure
1 Disconnect and remove power supply from radar pod.
2 Ground J1 pin E or F.
NOTE: Connect directly to the pin(s) or via a test harness equipped with a
MS3106F20-27S (or equivalent) connector.
3 Apply 28.0 ± 0.5 Vdc to J1 pin A for two (2) hours.
4 After two (2) hours, remove 28 Vdc input.
5 Apply 100.0 ohm ± 2%, 10.0 W, load resistor to J1 pin C.
6 Apply 13.0 ohm ± 2%, 5.0 W, load resistor to J1 pin H.
NOTE: The 13 ohm resistor can consist of two five (5) watt resistors whose series
ohm value is equal to 13 ohms.
7 Ground J1 pin I to turn unit ON.
8 Using the voltmeter:
a Monitor the output voltage from J1 pin C for a minimum of 45 minutes. Voltage
must be 24.0 ± 1.0 Vdc for at least 45 minutes after the load is applied.
b Check the output voltage from J1 pin H. Verify 5.0 ± 0.3 Vdc.
9 If the unit meets the standards in step 8, proceed to step 10. If the unit fails the
standards in step 8, replace it.
10 Disconnect all loads (i.e. - J1 pin C and J1 pin H) and the ground from J1 pin I.
11 Repeat step 3. When the unit is fully charged, disconnect it from the test set-up and
reinstall it.