MEL 74-01
Qu’est-ce que c’est
Item MEL « Ignition Systems » (ATA 74-01) du système allumage 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 74-01 — Ignition Systems.
Catégorie(s) : B, C.
Rappel délais : B — 3 jours calendaires ; 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.
74-01 — Ignition Systems
CAT — · installé — · requis dispatch —
74-01-02CAT — · installé — · requis dispatch —
74-01-02-01 — Left Ignition Systems
CAT — · installé — · requis dispatch —
74-01-02-01A — ER Operations Allowed
CAT B · installé 2 · requis dispatch 1
One may be inoperative provided: a) Ignition Select Switch remains in BOTH position. b) Right ignition systems operate normally.
74-01-02-01B — Except ER Operations
CAT C · installé 2 · requis dispatch 0
(O) Except for ER operations, may be inoperative provided: a) Ignition Select Switch remains in BOTH position. b) Associated engine right ignition system operates normally.
74-01-02-02 — Right Ignition Systems
CAT — · installé — · requis dispatch —
74-01-02-02A — ER Operations Allowed
CAT B · installé 2 · requis dispatch 1
(M)(O) One may be inoperative provided: a) Ignition Select Switch remains in BOTH position. b) Left ignition systems operate normally. c) Associated engine left igniter is connected to AC Standby Bus by an acceptable configuration.
74-01-02-02B — Except ER Operations
CAT C · installé 2 · requis dispatch 0
(M)(O) Except for ER operations, may be inoperative provided: a) Ignition Select Switch remains in BOTH position, b) Associated engine left ignition systems operate normally, and c) Associated engine left igniter is connected to AC Standby Bus by an acceptable configuration
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 ; C — 10 jours calendaires. 8 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 affected ENGINE START switch and placard Ignition Select Switch:
OPERATE IN BOTH ONLY.
4. Journey log / other instructions (texte MEL) :
Print the following information in the journey log sheet.
(NO. 1)(NO. 2) ENGINE (LEFT)(RIGHT) IGNITION SYSTEM INOP
5. Respecter toutes les restrictions du MEL — ne pas en inventer.
(O) OPERATIONS PROCEDURES — texte MEL :
74-01-02-01B ETOPS NOT allowed:
Normal operation of the operable ignition system may be confirmed as follows:
1. Set Ignition Select switch to IGN R for starting the associated engine.
2. After engine start, set Ignition Select switch to BOTH.
74-01-02-02A and 74-01-02-02B:
Normal operation of the operable ignition system may be confirmed as follows:
1. Set the Ignition Select switch to IGN R for starting the associated engine for airplanes not
equipped with R913/R914 Power Sense relays.
2. After engine start, set the Ignition Select switch to BOTH.
(M) MAINTENANCE PROCEDURES — texte MEL (maintenance ; l’équipage vérifie que c’est fait) :
74-01-02-02A and 74-01-02-02B
NOTE: Dispatch is not permitted if the ignition failure is due to an EEC right igniter fault (AMM 74-
00-00, EEC BITE Igniters Test).
Airplanes not equipped with R913/R914 Power Sense relays for the ignition system. Right Ignition
System(s), connect the LEFT igniter to AC Standby Bus (AMM 74-00-00/901):
1. Open applicable P18-2/P6-2 Panel circuit breakers:
a) Engine No. 1 - ENGINE 1 IGNITION RIGHT and ENGINE 1 IGNITION LEFT
b) Engine No. 2 - ENGINE 2 IGNITION RIGHT and ENGINE 2 IGNITION LEFT
2. Without automatic ignition:
Verify that the start levers are in the CUTOFF position and ENGINE START switch is in the OFF
position.
3. With automatic ignition:
Verify that the start levers are in the CUTOFF position and ENGINE START switch is in the AUTO
position.
4. Open fan cowl on the associated engine.
WARNING
MAKE SURE THE IGNITION EXCITERS ARE DE-ENERGIZED BEFORE WORKING ON THE
IGNITION SYSTEM. WAIT FOR A MINIMUM OF FIVE MINUTES TO RELEASE THE HIGH
VOLTAGE FROM IGNITION EXCITER.
5. Disconnect LEFT/RIGHT power supply cables from the LEFT/RIGHT ignition exciter.
6. Connect cables as follows:
a) LEFT power supply cable to RIGHT exciter.
b) RIGHT power supply cable to LEFT exciter.
7. Close the circuit breakers opened in Step 1.
8. Perform Audible Test of right Ignition System - EEC BITE.
9. Close fan cowl on the associated engine.
Restrictions / notes (extrait MEL)
(NO. 1)(NO. 2) ENGINE (LEFT)(RIGHT) IGNITION SYSTEM INOP
(O) Except for ER operations, may be inoperative provided: a) Ignition Select Switch remains in BOTH position. b) Associated engine right ignition system operates normally.
(M)(O) Except for ER operations, may be inoperative provided: a) Ignition Select Switch remains in BOTH position, b) Associated engine left ignition systems operate normally, and c) Associated engine left igniter is connected to AC Standby Bus by an acceptable configuration
74-01-02-01B ETOPS NOT allowed:
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 · 74-01 (page 575)