1. Confirmer l’item, la catégorie et le nombre requis dans le MEL officiel (lien PDF).
2. Appliquer les procédures (O) et/ou (M) du MEL avant dispatch — texte officiel ci-dessous.
3. Placard (texte MEL) :
Apply sticker adjacent to Engine/APU Fire Extinguisher Test Switch.
4. Journey log / other instructions (texte MEL) :
Print the following information in the journey log sheet.
ENGINE/APU FIRE EXTINGUISHER TEST SYSTEM (OR SQUIB LIGHT) INOP
5. Respecter toutes les restrictions du MEL — ne pas en inventer.
(O) OPERATIONS PROCEDURES — texte MEL :
26-09-01: APU Fire Extinguisher Squib Test Circuits (EXT TEST)
1. Reference the following Flight Crew Operations Manual Procedures:
a) Normal Procedures - Amplified Procedures - Preflight Procedure - First Officer.
b) Supplementary Procedures - Electrical Power Up.
2. Verify remaining APU squib test circuit operates normally once each flight day in the
"EXTINGUISHER TEST Switch – Check":
a) EXT TEST switch in position 1 or 2, APU green extinguisher test light illuminates.
b) Release EXT TEST switch, APU green extinguisher test light extinguishes.
26-09-02: APU Squib Light inoperative
1. Prior to departure, verify with Dispatch that suitable arrangements have been made at
destination, alternate and any technical stops (if required) to handle any anticipated ground
service requirements. If ground power or adequate air will not be available, particular attention
must be given to refuelling, de-icing and cross bleed start requirements.
2. Do not operate APU.
CAUTION:
CREW MUST HAVE ADEQUATE TIME TO BRIEF FOR SUPPLEMENTARY PROCEDURES IN
REGARDS TO ENGINE STARTING, PUSHBACK, COMMUNICATION WITH GROUND
CONTROL, DE-ICING AND OTHER GROUND HANDLING CONSIDERATIONS.
(M) MAINTENANCE PROCEDURES — texte MEL (maintenance ; l’équipage vérifie que c’est fait) :
None required.
(M#) MAINTENANCE PROCEDURES — personnel maintenance obligatoire — texte MEL :
Prepare the airplane for flight with the squib test system inoperative (AMM 26-00-00/901):
WARNING:
THE P6-2 CIRCUIT BREAKER PANEL CONTAINS HIGH VOLTAGE/CURRENTS THAT CAN
CAUSE INJURY TO PERSONNEL AND DAMAGE TO EQUIPMENT. TO PREVENT INJURY,
RESTRICT PERSONNEL FROM FIRE BOTTLE AREA WHILE PERFORMING TEST
1. Build a squib test lamp with pigtail leads that end in pin contacts. Use only a 28 Volt, 40 milliamp
lamp in a suitable holder.
2. Verify that the squib circuit is operative:
a) For Engines:
1. Open all four engine fire extinguisher circuit breakers on the P6-2 Circuit Breaker Panel.
NOTE: Refer to the table below for the appropriate circuit breakers.
2. Gain access to the P6-2 Circuit Breaker Panel.
3. Connect the test lamp across the terminals of the appropriate circuit breaker for the
inoperative squib test circuit.
4. Push the override switch to manually unlock the Engine Fire Warning switch.
5. Pull the Engine Fire Warning switch up.
6. Rotate the Engine Fire Warning switch (left or right):
a) When the test lamp comes on, the squib test circuit is intact.
7. Rotate the Engine Fire Warning switch back to the center position and push it down.
8. Remove the test lamp from the circuit breaker.
9. Close the circuit breakers.
b) For APU:
Open the APU fire extinguisher circuit breaker on P6-2 Circuit Breaker Panel.
Gain access to the P6-2 Circuit Breaker Panel.
Connect the test lamp across the terminals of the circuit breaker.
Push the override switch to manually unlock the APU Fire Warning switch.
Pull the APU Fire Warning switch up.
Rotate the APU Fire Warning switch (left or right):
a) When the test lamp comes on, the squib test circuit is intact.
Rotate the APU Fire Warning switch back to the center position and push it down.
Remove the test lamp from the circuit breaker.
Close the circuit breaker.
Engine Squib Test Table
Table 1: Dual Outlet Dual Cartridge Bottle
Bottle Squib No. Squib Plug C/B Open and Test Lamp Connection
No.
Left 1 D582, Pin 4 Across C296 Left Ext Bottle
Left 1 D582, Pin 6 Across C1021 Left Ext Bottle
Left 2 D1322, Pin 4 Across C296 Left Ext Bottle
Left 2 D1322, Pin 6 Across C1021 Left Ext Bottle
Right 1 D584, Pin 4 Across C297 Right Ext Bottle
Right 1 D584, Pin 6 Across C1022 Right Ext Bottle
Right 2 D1324, Pin 4 Across C297 Right Ext Bottle
Right 2 D1324, Pin 6 Across C1022 Right Ext Bottle
MAINTENANCE NOTE:
It is vitally important the Dispatch be advised as soon as possible when dispatching with an APU (or
some function thereof) inoperative. This will allow maximum time to make the required ground
handling arrangements.