The DISCH Legend of the ENG 1/AGENT 2 Pushbutton Switch does not Come on

TASK 26-21-00-810-812-A
The DISCH Legend of the ENG 1/AGENT 2 Pushbutton Switch does not Come on

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
ESPM 2045110
AMM 26-12-00-710-001	Operational Check of Loop/Squib
AMM 26-12-12-000-001	Removal of the ENG/APU Fire Panel
AMM 26-12-12-400-001	Installation of the ENG/APU Fire Panel

3. Fault Confirmation
Subtask 26-21-00-865-059-A

A. Make sure that this(these) circuit breaker(s) is(are) closed:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
122VU	LIGHTING/TST/BOARD/SPLY	30LP	X06

Subtask 26-21-00-710-072-A

B. Test
(1) Do the operational test of the engine fire and overheat detection (loop/squib) AMM 26-12-00-710-001.

4. Fault Isolation
Subtask 26-21-00-810-061-A

A. If the DISCH legend of the ENG 1/AGENT 2 pushbutton switch does not come on during the fire test:

on the panel 25VU, set the ANN LT switch to TEST, and do a check to see if the DISCH legend of the ENG 1/AGENT 2 pushbutton switch comes on.

(1) If the DISCH legend does not come on:
(a) Replace the lamp of the DISCH legend of the ENG 1/AGENT 2 pushbutton switch.

(b) Or replace the ENG 1/AGENT 2 pushbutton switch that has LEDs ESPM 2045110.
(2) If the DISCH legend comes on:

Subtask 26-21-00-710-073-A

B. Do the test given in Para. 3.

5. Close-up
Subtask 26-21-00-860-059-A

A. Put the aircraft back to its initial configuration.
(1) On the panel 25VU, set the ANN LT switch to BRT.

[Rev.8 from Aug 2018] 2026.04.04 04:27:24 UTC