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Terrain Awareness and Warning System (TAWS)

MEL 34-26
Qu’est-ce que c’est
Item MEL « Terrain Awareness and Warning System (TAWS) » (ATA 34-26) du système navigation 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 34-26 — Terrain Awareness and Warning System (TAWS).
Catégorie(s) : A, C, B.
Rappel délais : A — délai indiqué dans les remarques de l’item ; C — 10 jours calendaires ; 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 5 · 2026-01-08.

34-26 — Terrain Awareness and Warning System (TAWS)
CAT — · installé — · requis dispatch —
34-26-01 — Ground Proximity Warning System (GPWS)
CAT A · installé 1 · requis dispatch 0
(O) May be inoperative provided: a) Alternate procedures are established and used, and b) Repairs are made within three flight days.
34-26-01-01 — Modes 1 thru 4
CAT A · installé 4 · requis dispatch 0
(O) May be inoperative provided: a) Alternate procedures are established and used, and b) Repairs are made within three flight days.
34-26-01-02 — Test Mode
CAT A · installé 1 · requis dispatch 0
May be inoperative provided: a) GPWS is considered inoperative, and b) Repairs are made within three flight days.
34-26-01-04 — Advisory Callouts (Mode 6)
CAT C · installé 1 · requis dispatch 0
(O) May be inoperative provided alternate procedures are established and used.
34-26-01-04A
CAT B · installé 1 · requis dispatch 0
(O) May be inoperative provided alternate procedures are established and used.
34-26-01-05 — Windshear Warning and Flight Guidance Mode (Reactive) (Mode 7)
CAT — · installé — · requis dispatch —
34-26-01-05A
CAT B · installé 1 · requis dispatch 0
(O) May be inoperative provided: a) Alternate procedures are established and used, and b) Takeoffs and landings are not conducted in known or forecast windshear conditions. NOTE: Alternate procedures should include reviewing windshear avoidance and recovery procedures.
34-26-01-05B
CAT C · installé 1 · requis dispatch 0
(O) May be inoperative provided: a) Alternate procedures are established and used, and b) Windshear Detection and Avoidance System (Predictive) operates normally.
34-26-02 — Terrain System - Forward Looking Terrain Avoidance (FLTA) and Premature Descent Alert (PDA) Functions
CAT B · installé 1 · requis dispatch 0
(O) May be inoperative provided alternate procedures are established and used.
34-26-04 — Runway Awareness and Advisory System (RAAS)
CAT C · installé 1 · requis dispatch 0
Explication (français)
Dispatch selon le MEL Air Inuit AILO-0903 (texte extrait du PDF dans l’app). Catégorie(s) de réparation : A — délai indiqué dans les remarques de l’item ; C — 10 jours calendaires ; B — 3 jours calendaires. 11 condition(s) de relief extraite(s) du tableau officiel (installé / requis / remarques). Une procédure (O) opérations s’applique — voir ci-dessous (texte MEL anglais). 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 on or adjacent to control and/or display – GPWS MODE (1-5 or TEST or WINDSHEAR).

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

Print the following information in the journey log sheet. TAWS/GPWS (SYSTEM) (MODE) (TERRAIN SYSTEM/RAAS) INOP

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

(O) OPERATIONS PROCEDURES — texte MEL :

The lack of GPWS/TAWS requires an increase in flight crew awareness of aircraft configuration, altitude, and flight path. Consider using all airplane systems available (autopilot, ILS, FMS). Review Minimum Enroute Altitudes and altitude callouts. • For GPWS Modes 1-7, Advisory Callouts inoperative, and FLTA and PDA functions inoperative: Flight crew must increase their awareness of aeroplane configuration, altitude and flight path. This includes flight crew use of all aeroplane systems available (autopilot, auto-land, ILS, FMCS) and flight crew review of Minimum En Route Altitudes (MEA) and altitude callouts. • For GPWS Windshear Mode (Reactive) inoperative and Windshear Detection and Avoidance System (Predictive) not operating normally: Flight crew must increase their awareness of aeroplane configuration, altitude and flight path. This includes flight crew use of all aeroplane systems available (autopilot, auto-land, ILS, FMCS) and flight crew review of Minimum En Route Altitudes (MEA), Windshear Avoidance and Windshear Recovery procedures. If Windshear Detection and Avoidance System (Predictive) does not operate normally do not takeoff and land in known or forecast Windshear conditions. • For GPWS Windshear Mode (Reactive) inoperative and Windshear Detection and Avoidance System (Predictive) operating normally: Flight crew must increase their awareness of aeroplane configuration, altitude and flight path. This includes flight crew use of all aeroplane systems available (autopilot, auto-land, ILS, FMCS) and flight crew review of Minimum En Route Altitudes (MEA), Windshear Avoidance and Windshear Recovery procedures. • For Terrain System Forward Looking Terrain Avoidance and Premature Descent Alert: Flight crew must ensure EGPWS is functional. GROUND PROXIMITY WARNING FUNCTIONS REFERENCE (DO-161A AND TSO-92C) Mode 1 Excessive rate of descent. Mode 2 Excessive closure rate to terrain. Mode 3 Negative climb rate or altitude loss after takeoff. Mode 4 Flight into terrain when not in landing configuration. Mode 5 Excessive downward deviation from an Instrument Landing System (ILS) glideslope. Mode 6 Altitude Aural Callouts.

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

None required. MAINTENANCE NOTE: Advise Dispatch, flight planning may be affected.
Restrictions / notes (extrait MEL)
TAWS/GPWS (SYSTEM) (MODE) (TERRAIN SYSTEM/RAAS) INOP
not operate normally do not takeoff and land in known or forecast Windshear conditions.
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.

GROUND PROXIMITY GPWS INOPERATIVE · QRH 15.5QRH section 11 — Flight Management (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 · 34-26 (page 460)