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 affected FILTER BYPASS light.
4. Journey log / other instructions (texte MEL) :
Print the following information in the journey log sheet.
(L) (R) FUEL FILTER DIFFERENTIAL PRESSURE WARNING SYSTEM INOP
5. Respecter toutes les restrictions du MEL — ne pas en inventer.
(O) OPERATIONS PROCEDURES — texte MEL :
None required.
OPERATIONS NOTE
If the remaining FILTER BYPASS light illuminates, assume both engine fuel filters have an impending
bypass condition.
(M) MAINTENANCE PROCEDURES — texte MEL (maintenance ; l’équipage vérifie que c’est fait) :
Verify that the malfunction is in the fuel filter bypass warning system (AMM 73-00-00/901):
1. If the FILTER BYPASS light illuminates with the engine not operating either with the EEC powered
(start switch in CONT) or EEC not powered (start switch in OFF/AUTO), the fuel filter bypass
warning system is faulty. Proceed to step 3 below to replace the fuel filter.
2. If the FILTER BYPASS light does NOT illuminate with the engine not operating, perform the
following:
a) If Fuel FILTER BYPASS light was ON prior to engine shutdown, check EEC BITE-RECENT
FAULTS for a "FUEL FILTER SIGNALS DISAGREE" fault message (AMM 73-21-00). If this fault
message is present, proceed to step 3 below to replace the fuel filter.
NOTE: Other EEC fault messages may need to be addressed prior to dispatch.
b) Check DEU for fault messages. A CDS MAINT message may indicate a DEU fault that affects
the fuel filter bypass indication.
NOTE: A CDS FAULT must be addressed prior to dispatch.
c) If Fuel FILTER BYPASS light is inoperative OFF, do EEC TEST, AMM task 73-21-00-700-804-
F00.
NOTE: Remaining indication lights in the EEC test should illuminate normally.
3. Replace fuel filter with a new filter (AMM 73-11-02).
NOTE: Except for ER operations, one flight is permitted prior to filter replacement provided that fuel
drained from filter housing drain plug is free of visible, gross contamination.