MEL 21-27
Qu’est-ce que c’est
Item MEL « Electrical/Electronic Equipment Cooling Blowers » (ATA 21-27) du système conditionnement d’air / pressurisation sur Boeing 737-800 NG (flotte Air Inuit). Cette page est une aide équipage. Le MEL officiel AILO-0903 fait toujours foi pour le dispatch.
Item MEL
ATA 21-27 — Electrical/Electronic Equipment Cooling Blowers.
Catégorie(s) : B.
Rappel délais : B — 3 jours calendaires.
Source PDF · AILO-0903 Amdt 5 · 2026-01-08. Colonnes : CAT · 2. NUMBER INSTALLED · 3. NUMBER REQUIRED FOR DISPATCH · 4. REMARKS OR EXCEPTIONS. En-tête item : Amdt Original · 2024-05-31.
21-27 — Electrical/Electronic Equipment Cooling Blowers
CAT — · installé — · requis dispatch —
21-27-03 — CDS
CAT B · installé 4 · requis dispatch 3
(M) One fan may be inoperative provided: a) All remaining fans are verified to operate normally, and b) Both low flow detectors are verified to operate normally.
Explication (français)
Dispatch selon le MEL Air Inuit AILO-0903 (texte extrait du PDF dans l’app). Catégorie(s) de réparation : B — 3 jours calendaires. 2 condition(s) de relief extraite(s) du tableau officiel (installé / requis / remarques). Une procédure (O) opérations s’applique — voir ci-dessous (texte MEL anglais). Une procédure (M) maintenance s’applique avant dispatch — voir ci-dessous. Les switch names, notes et chiffres ci-dessous sont ceux du MEL. Ne pas ajouter d’étape qui n’y figure pas.
Procédure équipage — (O) / (M) / placard
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 associated Equipment Cooling Switch position.
4. Journey log / other instructions (texte MEL) :
Print the following information in the journey log sheet.
(NORMAL or ALTERNATE) (SUPPLY or EXHAUST) EQUIPMENT COOLING BLOWER INOP
5. Respecter toutes les restrictions du MEL — ne pas en inventer.
(O) OPERATIONS PROCEDURES — texte MEL :
None required.
(O) OPERATIONS NOTE
1. If the equipment cooling supply OFF light illuminates during flight (both supply fans inoperative),
continued flight beyond 30 minutes can result in loss of the Captain’s Display Units (DU) and the
lower center DU.
2. If the equipment cooling exhaust OFF light illuminates during flight (both exhaust fans
inoperative), continued flight beyond 30 minutes can result in loss of the First Officer’s Display
Units (DU) and the upper center DU.
(M) MAINTENANCE PROCEDURES — texte MEL (maintenance ; l’équipage vérifie que c’est fait) :
Verify the remaining fans and the two low flow detectors operate normally (AMM 21-00-00/901):
1. Make sure the low-flow detector and the remaining fan operate normally for the supply system or
exhaust system (with the inoperative fan):
a) Position the associated EQUIP COOLING SUPPLY or EXHAUST switch to the operative fan
position (NORM or ALTN).
b) Make sure the associated equipment cooling supply or exhaust OFF light extinguishes.
2. Verify the fans and the low-flow detector of the supply or exhaust system with the two fans
operative, operate normally:
a) Do these steps when the supply system has both fans operative:
i) Position the EQUIP COOLING SUPPLY switch to NORM.
ii) Open P6-4 panel circuit breaker EQPT COOLING SUPPLY FAN CONT-NORMAL.
iii) Make sure the equipment cooling supply OFF light illuminates.
iv) Position the EQUIP COOLING SUPPLY switch to ALTN.
v) Make sure the equipment cooling supply OFF light extinguishes.
vi) Open P6-4 panel circuit breaker EQPT COOLING SUPPLY FAN CONTROL-ALTN.
vii) Make sure the equipment cooling supply OFF light illuminates.
viii) Close the two P6-4 panel circuit breakers.
ix) Make sure that the equipment cooling supply OFF light extinguishes.
x) Position the EQUIP COOLING SUPPLY switch to NORM.
b) Do these steps when the exhaust system has both fans operative:
i) Position the EQUIP COOLING EXHAUST switch to NORM.
ii) Open P6-4 panel circuit breaker EQPT COOLING EXH FAN CONT-NORMAL.
iii) Make sure the equipment cooling exhaust OFF light illuminates.
iv) Position the EQUIP COOLING EXHAUST switch to ALTN.
v) Make sure the equipment cooling exhaust OFF light extinguishes.
vi) Open P6-4 panel circuit breaker EQPT COOLING EXH FAN CONTROL-ALTN.
vii) Make sure the equipment cooling exhaust OFF light illuminates.
viii) Close the two P6-4 panel circuit breakers.
ix) Make sure that the equipment cooling exhaust OFF light extinguishes.
x) Position the EQUIP COOLING EXHAUST switch to NORM.
Restrictions / notes (extrait MEL)
(NORMAL or ALTERNATE) (SUPPLY or EXHAUST) EQUIPMENT COOLING BLOWER INOP
QRH / procédures liées dans l’app
Aide-mémoire formation. Le MEL Air Inuit officiel (AILO-0903) Amdt 5 (2026-01-08) fait toujours foi pour le dispatch, les (O)/(M) et les restrictions. Cette page ne remplace pas le PDF.
MEL officiel · 21-27 (page 100)