MEL 21-01 Air Conditioning Packs • BoredAviator

MEL 21-01

⚠ RAPPEL HOT — RESTRICTION MEL

1 PACK → FL 250 · 2 PACKS → 10 000 FT

Altitude limitée selon le relief MEL (pack L/R ou les deux).

Qu’est-ce que c’est

Item MEL « Air Conditioning Packs » (ATA 21-01) 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 21-01 — Air Conditioning Packs.
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.

21-01 — Air Conditioning Packs

CAT — · installé — · requis dispatch —

21-01-08 — All Cargo Configuration (STC ST02690LA) Applicable to: C-FTUZ

CAT — · installé — · requis dispatch —

21-01-08A — One Pack Inoperative Flight altitude remains at or below FL250

CAT C · installé 2 · requis dispatch 1

(O) Except for ETOPS, one may be inoperative provided flight altitude remains at or below FL 250.

21-01-08B — Both Packs Inoperative

CAT C · installé 2 · requis dispatch 0

(M)(O) Except for ETOPS, may be inoperative provided: a) Flight is conducted in an unpressurized configuration, and b) Procedures are established and used to ensure main deck cargo compartment and lower cargo compartments remain empty or are verified to contain only empty cargo handling equipment, ballast (ballast may be loaded in ULDs), and/or Fly Away Kits. 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.

21-01-09 — Combi Configuration (STC SA25-72) Applicable to: C-FTUW, C-FTUY

CAT — · installé — · requis dispatch —

21-01-09A — Right Pack Inoperative

CAT C · installé 2 · requis dispatch 1

(O) Right pack may be inoperative provided flight altitude remains at or below FL 250.

21-01-09B — Left Pack Inoperative

CAT C · installé 2 · requis dispatch 1

(O) Left pack may be inoperative provided: a) Flight altitude remains at or below FL250, and b) Procedures are established and used to ensure main deck 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. 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.

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. 7 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 Pack Selector Switch(es).

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

Print the following information in the journey log sheet. 21-01-08A: One Pack Inoperative (L) or (R) PACK INOP. LIMIT ALTITUDE TO FL 250. 21-01-08B: Both Air Conditioning Packs Inoperative BOTH PACKS INOP. LIMIT ALTITUDE TO 10,000 FT. 21-01-09A: Right Pack Inoperative OR 21-01-09B: Left Pack Inoperative (L) or (R) PACK INOP. LIMIT ALTITUDE TO FL 250

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

(O) OPERATIONS PROCEDURES — texte MEL :

21-01-08A: One Pack Inoperative 1. When dispatching with one operating pack supplied by engine bleed air on takeoff: a) Determine V1 (MCG) based on engine bleed for packs OFF. b) Determine takeoff performance based on packs AUTO. 2. Limit altitude to FL 250. 3. Position the associated PACK switch to OFF. 4. Position the ISOLATION VALVE switch to CLOSE after starting engines. 5. If desired, for increased air flow when the flaps are extended (takeoff and landing), use the APU to supply bleed air to the operating pack. a) Right Pack Inoperative: i) Do the Supplementary Procedure - Air Systems “No Engine Bleed Takeoff and Landing” (Refer to the Flight Crew Operations Manual). NOTE: Keep the pack switch for the right (inoperative) pack in the OFF position and the ISOLATION VALVE switch in the CLOSE position. b) Left pack inoperative – PRIOR to takeoff or landing: i) Engine No. 1 BLEED air switch to OFF ii) R PACK switch to AUTO iii) L PACK switch to OFF iv) ISOLATION VALVE switch to OPEN v) Engine No. 2 BLEED air switch to OFF vi) APU BLEED air switch to ON. c) Left pack inoperative - AFTER takeoff or landing: vii) APU BLEED air switch to OFF viii) Engine No. 2 BLEED air switch to ON ix) ISOLATION VALVE switch to CLOSE x) Engine No. 1 BLEED air switch to ON. 21-01-08B: Both Packs Inoperative Main deck cargo compartment must be or verified to contain only empty cargo handling equipment, ballast (ballast may be loaded in ULDs), and/or Fly Away Kits. 1. Limit altitude to 10,000 ft. for crew without oxygen. 2. Flights above 10,000 ft. require flight crew to be on oxygen. 3. Except for ditching, keep the outflow valve in the fully open position. 4. Position the ISOLATION VALVE switch to CLOSE after starting engines. 5. To improve main cargo compartment and crew compartment temperatures: a) If possible, pre-condition the cabin to a low temperature prior to dispatch. A low initial cabin temperature will result in a lower peak temperature. b) Maintain the highest allowable flight altitude c) Minimize cabin heat by pulling the shades down and turning off unnecessary lights. d) Position RECIRC FAN switch to AUTO. NOTE 1: Prolonged operation at TAT below 10 degrees C / 50 degrees F can cause freezing of unheated water systems located in the aft lower lobe (if installed). NOTE 2: Operation at TAT above 32 degrees C / 90 degrees F is not recommended due to the resulting high temperatures in the main cargo compartment and crew cabin. 21-01-09A: Right Pack Inoperative OR 21-01-09B: Left Pack Inoperative 1. When dispatching with one operating pack supplied by engine bleed air on takeoff: a) Determine V1 (MCG) based on engine bleed for packs OFF. b) Determine takeoff performance based on packs AUTO. 2. Limit altitude to FL 250. 3. Position the associated PACK switch to OFF. 4. Position the ISOLATION VALVE switch to CLOSE after starting engines. 5. If desired, for increased air flow when the flaps are extended (takeoff and landing), use the APU to supply bleed air to the operating pack. a) Right Pack Inoperative: i) Do the Supplementary Procedure - Air Systems “No Engine Bleed Takeoff and Landing” (Refer to the Flight Crew Operations Manual). NOTE: Keep the pack switch for the right (inoperative) pack in the OFF position and the ISOLATION VALVE switch in the CLOSE position. b) Left pack inoperative – PRIOR to takeoff or landing: i) Engine No. 1 BLEED air switch to OFF ii) R PACK switch to AUTO iii) L PACK switch to OFF iv) ISOLATION VALVE switch to OPEN v) Engine No. 2 BLEED air switch to OFF vi) APU BLEED air switch to ON. c) Left pack inoperative - AFTER takeoff or landing: i) APU BLEED air switch to OFF ii) Engine No. 2 BLEED air switch to ON iii) ISOLATION VALVE switch to CLOSE

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

21-01-08B: Both Packs Inoperative Manually position the outflow valve in the full open position. Position the Pressurization Mode selector to MAN. Hold the VALVE toggle switch in the OPEN position until valve position indicator indicates full open.

Restrictions / notes (extrait MEL)

21-01-08A: One Pack Inoperative

(L) or (R) PACK INOP. LIMIT ALTITUDE TO FL 250.

21-01-08B: Both Air Conditioning Packs Inoperative

BOTH PACKS INOP. LIMIT ALTITUDE TO 10,000 FT.

21-01-09A: Right Pack Inoperative OR 21-01-09B: Left Pack Inoperative

(L) or (R) PACK INOP. LIMIT ALTITUDE TO FL 250

(O) Except for ETOPS, one may be inoperative provided flight altitude remains at or below FL 250.

(O) Right pack may be inoperative provided flight altitude remains at or below FL 250.

2. Limit altitude to FL 250.

1. Limit altitude to 10,000 ft. for crew without oxygen.

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.

PACK · QRH 2.17 QRH 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 · 21-01 (page 60)