MEL 21-19
Qu’est-ce que c’est
Item MEL « Passenger Cabin Temperature Control Systems » (ATA 21-19) 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 21-19 — Passenger Cabin Temperature Control Systems.
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 Original · 2024-05-31.
21-19 — Passenger Cabin Temperature Control Systems
CAT — · installé — · requis dispatch —
21-19-02 — FWD/AFT
CAT — · installé — · requis dispatch —
21-19-02-01CAT C · installé 2 · requis dispatch 0
(O) May be dispatched with faults indicated by ZONE TEMP Light(s) during Master Caution recall provided associated temperature control system is checked to operate normally before each takeoff.
21-19-02-02CAT — · installé — · requis dispatch —
21-19-02-02A — Trim Air PRSOV Remains CLOSED
CAT C · installé 2 · requis dispatch 0
(M)(O) May be inoperative provided Trim Air Pressure Regulating and Shutoff Valve remains CLOSED.
21-19-02-02B — Trim Air Modulating Valve Deactivated CLOSED
CAT C · installé 2 · requis dispatch 0
(M#)(O) May be inoperative provided associated Trim Air Modulating Valve is deactivated CLOSED.
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. 6 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 Passenger Cabin Temperature Control selector(s) or TRIM AIR Switch(es)
as applicable.
4. Journey log / other instructions (texte MEL) :
Print the following information in the journey log sheet.
• Condition 1 - One or Both System(s) ZONE TEMP Faults
PASSENGER CABIN TEMPERATURE CONTROL SYSTEM FAULT - CHECK BEFORE FLIGHT
• Condition 2 - One or Both Trim Air Modulating Valve(s) Inoperative
TRIM AIR MODULATING VALVE(S) INOP
MAINTENANCE (M) PROCEDURES
21-19-02-02A Trim Air Pressure Regulating and Shutoff Valve remains CLOSED
Position the TRIM AIR switch to OFF.
5. Respecter toutes les restrictions du MEL — ne pas en inventer.
(O) OPERATIONS PROCEDURES — texte MEL :
21-19-02-01
Check normal operation of the associated temperature control system before each takeoff:
1. Make sure that the passenger cabin temperature is stabilized between 70 - 80 degrees F (21 - 27
degrees C).
2. Position the AIR TEMP source selector to SUPPLY DUCT - FWD or SUPPLY DUCT - AFT.
3. Rotate the associated temperature selector fully clockwise (W).
4. Observe the Air Temperature indicator and check that the temperature increases.
5. Rotate the associated temperature selector fully counter clockwise (C).
6. Observe the Air Temperature indicator and check that the temperature decreases.
21-19-02-02A
1. Operate with TRIM AIR switch OFF.
2. Use normal procedures to operate the temperature selectors.
21-19-02-02B
Use normal procedures to operate the temperature selectors.
With a trim air modulating valve deactivated, the associated FWD CAB or AFT CAB ZONE TEMP light
will illuminate during Master Caution recall and will extinguish when Master Caution is reset.
(M#) MAINTENANCE PROCEDURES — personnel maintenance obligatoire — texte MEL :
21-19-02-02B Trim Air Modulating Valve Deactivated CLOSED
Deactivate trim air modulating valve(s) (locked closed) (AMM 21-00-00/901):
1. Position the FWD CAB and/or AFT CAB Temperature Selector to OFF.
2. Locate the associated trim air modulating valve(s) in the right ECS bay.
3. Turn the manual override until the visual position indicator shows the full closed position.
4. Disconnect and stow the electrical connector from the valve(s).
5. Position the associated Temperature Selector(s) to the normal temperature range.
Restrictions / notes (extrait MEL)
• Condition 1 - One or Both System(s) ZONE TEMP Faults
PASSENGER CABIN TEMPERATURE CONTROL SYSTEM FAULT - CHECK BEFORE FLIGHT
• Condition 2 - One or Both Trim Air Modulating Valve(s) Inoperative
TRIM AIR MODULATING VALVE(S) INOP
MAINTENANCE (M) PROCEDURES
21-19-02-02A Trim Air Pressure Regulating and Shutoff Valve remains CLOSED
Position the TRIM AIR switch to OFF.
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 · 21-19 (page 93)