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Equipment Cooling Automatic Flow Control Valve/Overboard Exhaust Valve

MEL 21-40
Qu’est-ce que c’est
Item MEL « Equipment Cooling Automatic Flow Control Valve/Overboard Exhaust Valve » (ATA 21-40) 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 21-40 — Equipment Cooling Automatic Flow Control Valve/Overboard Exhaust Valve.
Catégorie(s) : C.
Rappel délais : C — 10 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 5 · 2026-01-08.

21-40 — Equipment Cooling Automatic Flow Control Valve/Overboard Exhaust Valve
CAT — · installé — · requis dispatch —
21-40-02 — Digital Control System
CAT — · installé — · requis dispatch —
21-40-02-03
CAT C · installé 1 · requis dispatch 0
(M#)(O) May be inoperative in open position provided: a) Flight is conducted in an unpressurized configuration, b) Procedures are established and used to ensure lower forward cargo compartment remains empty or is verified to contain only empty cargo handling equipment, ballast (ballast may be loaded in ULDs), and/or Fly Away Kits (Engine Covers, Tool Kit and Strap Kit), c) Outflow valve is positioned to 25% open position, and d) Recirculation fan(s) operates normally. NOTE: For ballast purposes, use of bags (made of glass fibre or kevlar) of sand or ingots of non-magnetic (such as lead) is acceptable.
21-40-02-05
CAT C · installé 1 · requis dispatch 0
(M#)(O) Except for ER operations, may be inoperative provided: a) Actuator is verified to be in smoke position, and b) Both packs operate normally.
Explication (français)
Dispatch selon le MEL Air Inuit AILO-0903 (texte extrait du PDF dans l’app). Catégorie(s) de réparation : C — 10 jours calendaires. 4 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 (personnel maintenance obligatoire) 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 Pressurization Panel.

4. Journey log / other instructions (texte MEL) :

Print the following information in the journey log sheet. • Condition 1 - Equipment Cooling Automatic Flow Control Valve Inoperative OPERATE UNPRESSURIZED • Equipment Cooling Automatic Flow Control Valve Inoperative in Smoke Position BOTH PACKS REQUIRED

5. Respecter toutes les restrictions du MEL — ne pas en inventer.

(O) OPERATIONS PROCEDURES — texte MEL :

21-40-02-03 Equipment Cooling Automatic Flow Control Valve Inoperative OPEN Use MEL item 21-10-02-03 (O) procedure. 21-40-02-05 Equipment Cooling Automatic Flow Control Valve - Inoperative in Smoke Position Both air conditioning packs are required to maintain pressurization when the valve is failed with actuator in the smoke position. Descent may be required if an air conditioning pack fails enroute.

(M) MAINTENANCE PROCEDURES — texte MEL (maintenance ; l’équipage vérifie que c’est fait) :

None required.

(M#) MAINTENANCE PROCEDURES — personnel maintenance obligatoire — texte MEL :

21-40-02-03 Equipment Cooling Automatic Flow Control Valve Inoperative OPEN Use MEL item 21-10-02-03 (M) procedure. 21-40-02-05 Equipment Cooling Automatic Flow Control Valve - Inoperative in Smoke Position Verify that the Overboard Exhaust valve is in the SMOKE position. If the valve has not failed in the SMOKE position, use this procedure to position and deactivate the valve in the SMOKE position (AMM 21-00-00/901): 1. Put the airplane in the air mode with the BITE in the Proximity Switch Electronics Unit (PSEU) (AMM 32-09-00). 2. Position one of the PACK switches to HIGH. 3. Position the R RECIRC FAN to OFF. 4. After 10 seconds, open and collar P6-4 Panel circuit breaker A/C OVERBOARD EXH VALVE RECONFIG CONT. 5. Disconnect, cap and stow electrical connector D11880 on the Overboard Exhaust valve. 6. Verify that the valve is in the SMOKE position. 7. Close P6-4 Panel circuit breaker A/C OVERBOARD EXH VALVE RECONFIG CONT.
Restrictions / notes (extrait MEL)
• Condition 1 - Equipment Cooling Automatic Flow Control Valve Inoperative
OPERATE UNPRESSURIZED
• Equipment Cooling Automatic Flow Control Valve Inoperative in Smoke Position
BOTH PACKS REQUIRED
(M#)(O) May be inoperative in open position provided: a) Flight is conducted in an unpressurized configuration, b) Procedures are established and used to ensure lower forward cargo compartment remains empty or is verified to contain only empty cargo handling equipment, ballast (ballast may be loaded in ULDs), and/or Fly Away Kits (Engine Covers, Tool Kit and Strap Kit), c) Outflow valve is positioned to 25% open position, and d) Recirculation fan(s) operates normally.
(M#)(O) Except for ER operations, may be inoperative provided: a) Actuator is verified to be in smoke position, and b) Both packs operate normally.
QRH / procédures liées dans l’app

Liens vers des pages déjà présentes (QRH). Ce ne sont pas des procédures FCOM inventées. Le QRH officiel fait foi.

EQUIPMENT COOLING OFF · QRH 2.15off equipment coolingQRH section 02 — Air Systems (index)

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 · 21-40 (page 115)