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 Cooling OFF Light.
4. Journey log / other instructions (texte MEL) :
Print the following information in the journey log sheet.
EQUIPMENT COOLING LOW FLOW DETECTOR INOP
5. Respecter toutes les restrictions du MEL — ne pas en inventer.
(O) OPERATIONS PROCEDURES — texte MEL :
If both inboard and outboard display units on one side fail, try to restore displays by selecting the
other cooling fan in the system with the inoperative detector. The captain’s displays are cooled by
the supply fans. The first officer’s displays are cooled by the exhaust fans.
(M) MAINTENANCE PROCEDURES — texte MEL (maintenance ; l’équipage vérifie que c’est fait) :
None required.
Continued…
(M#) MAINTENANCE PROCEDURES — personnel maintenance obligatoire — texte MEL :
Verify associated fan operates normally (AMM 21-00-00/901).
1. Verify normal operation of the cooling system fans with the inoperative detector.
a) Supply system low flow detector inoperative
i) Make sure the normal supply fan operates by feeling the selected fan motor for vibration.
ii) Select the alternate supply fan and repeat.
b) Exhaust system low flow detector inoperative
i) Make sure the normal exhaust fan operates by feeling for air exiting the overboard exhaust
vent at the bottom of the airplane near the centerline at STA 370.
ii) Select the alternate exhaust fan and repeat.
2. Confirm that the remaining detector system operates normally.
a) Supply Cooling System
i) Open P6-4 panel circuit breaker EQUIPMENT COOLING - SUPPLY FAN - CONTROL -
NORMAL.
ii) Make sure the equipment cooling supply OFF light illuminates.
iii) Position the EQUIP COOLING SUPPLY switch to ALTN.
iv) Make sure the equipment cooling supply OFF light extinguishes.
v) Open P6-4 panel circuit breaker EQUIPMENT COOLING - SUPPLY FAN - CONTROL - ALTN.
vi) Make sure the equipment cooling supply OFF light illuminates.
vii) Close the two P6-4 panel circuit breakers.
viii) Make sure the equipment cooling supply OFF light extinguishes.
ix) Position the EQUIP COOLING SUPPLY switch to NORM.
b) Exhaust system low flow detector inoperative
i) Open P6-4 panel circuit breaker EQUIPMENT COOLING - EXHAUST FAN - CONTROL -
NORMAL.
ii) Make sure the equipment cooling exhaust OFF light illuminates.
iii) Position the EQUIP COOLING EXHAUST switch to ALTN.
iv) Make sure the equipment cooling exhaust OFF light extinguishes.
v) Open P6-4 panel circuit breaker EQUIPMENT COOLING - EXHAUST FAN - CONTROL - ALTN.
vi) Make sure the equipment cooling exhaust OFF light illuminates.
vii) Close the two P6-4 panel circuit breakers.
viii) Make sure the equipment cooling exhaust OFF light extinguishes.
ix) Position the EQUIP COOLING EXHAUST switch to NORM.
To prevent the equipment cooling ground crew call horn from sounding on the ground with a low flow
detector system inoperative, the associated Equipment Cooling Low Flow Detect Exhaust/Supply
circuit breaker on the P18-3 panel may be opened and collared. Refer to MEL Item 34-35 when
dispatching in this configuration.