B. Consumable Materials
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
No specific corrosion-resistant steel lockwire 0.8 mm (0.032 in.) dia.
C. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
24-41-00-861-002 Energize the Aircraft Electrical Circuits from the External Power 24-41-00-862-002 De-energize the Aircraft Electrical Circuits Supplied from the External Power
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3. Job Set-up
__________
Subtask 26-22-00-865-059
A. Open, safety and tag this(these) circuit breaker(s):
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------121VU APU/APU/CTL 2KD L42 121VU APU/ECB/SPLY 1KD L41
Subtask 26-22-00-865-060
B. Make sure that this(these) circuit breaker(s) is(are) closed:
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------121VU APU/FIRE/EXTIG/SQUIB/B 2WF L39 121VU APU/FIRE/EXTIG/SQUIB/A 1WF L38
Subtask 26-22-00-010-052
C. Get Access
(1)
Put the access platform below the access door 314AR.
(2)
Open the access door 314AR.
(3)
Remove and discard the lockwire from the electrical-connector 12WF-A of the APU fire-extinguisher bottle.
(4)
Disconnect the electrical-connector 12WF-A of the APU
fire-extinguisher bottle.
Subtask 26-22-00-861-056
D. Energize the aircraft electrical circuits (Ref. TASK 24-41-00-861-002).
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4. Procedure
_________
Subtask 26-22-00-720-050
A. Test
-------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
1. At the electrical connector At the electrical connector 12WF-A of
12WF-A of the APU fire the APU fire extinguisher bottle:
extinguisher bottle:
- connect the DC voltmeter - the DC voltmeter reads zero.
between the pin A and ground.
2. At the electrical connector At the electrical connector 12WF-A of
12WF-A of the APU fire the APU fire extinguisher bottle:
extinguisher bottle: - the DC voltmeter reads zero.
- connect the DC voltmeter
between the pin B and ground.
3. On the APU FIRE panel 20VU: On the APU FIRE panel 20VU:
- lift the guard and push the APU - the SQUIB legend in the AGENT
FIRE pushbutton switch. pushbutton switch comes on.
4. At the electrical connector At the electrical connector 12WF-A of
12WF-A of the APU fire the APU fire extinguisher bottle:
extinguisher bottle:
- connect the DC voltmeter - the DC voltmeter reads zero.
between the pin A and ground.
5. At the electrical connector At the electrical connector 12WF-A of
12WF-A of the APU fire the APU fire extinguisher bottle:
extinguisher bottle: - the DC voltmeter reads zero.
- connect the DC voltmeter
between the pin B and ground.
6. On the APU FIRE panel 20VU:
- push and hold the AGENT
pushbutton switch.
7. At the electrical connector At the electrical connector 12WF-A of
12WF-A of the APU fire the APU fire extinguisher bottle:
extinguisher bottle: - the DC voltmeter reads a value
- connect the DC voltmeter between 26.5V and 28V.
between the pin A and ground.
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-------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
8. At the electrical connector 12WF-A of the APU fire extinguisher bottle:
-connect the DC voltmeter between the pin B and ground.
9. On the APU FIRE panel 20VU:
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