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 Bleed Air Switch.
4. Journey log / other instructions (texte MEL) :
Print the following information in the journey log sheet.
(L) (R) ENGINE BLEED AIR SHUTOFF VALVE INOP - OBSERVE LIMITATIONS
5. Respecter toutes les restrictions du MEL — ne pas en inventer.
(O) OPERATIONS PROCEDURES — texte MEL :
NOTE 1 Use of the APU bleed air is limited to 17,000 feet. One air conditioning pack will be
unusable when dispatching with: (1) the right engine bleed inoperative, (2) the left engine
bleed inoperative and flight altitude greater than 17,000 feet, or (3) both engine bleeds
inoperative.
NOTE 2: When dispatching with a single engine bleed on for takeoff (airplane pressurized),
V1(MCG) should be determined based on AC packs OFF. Takeoff performance should be
based on AC packs AUTO.
1. Do not dispatch into known or forecast icing conditions.
2. Associated engine bleed switch is selected to the OFF position.
3. For left engine bleed inoperative:
a) At altitudes 17,000 feet and below, operate the left pack using the APU bleed air, the right
pack using the right engine bleed and the isolation valve CLOSE.
b) At altitudes above 17,000 feet, operate with the APU bleed air OFF.
1. Limit altitude to FL 250.
2. Operate the left pack using the right engine bleed, the right pack OFF and isolation
valve OPEN.
4. For right engine bleed inoperative:
a) Limit altitude to FL 250.
b) Operate the left pack using the left engine bleed, right pack OFF, and isolation valve CLOSE.
NOTE: At altitudes 17,000 feet and below, increased air flow will occur when flaps are extended
(takeoff and landing) and the APU is used instead of engine bleed to supply bleed air to the
operating pack. Refer to Boeing Operations Manual, NOENGINE BLEED TAKEOFF AND
LANDING PROCEDURE.
(M) MAINTENANCE PROCEDURES — texte MEL (maintenance ; l’équipage vérifie que c’est fait) :
None required.
MAINTENANCE NOTE:
Advise Dispatch. Flight Planning will be affected.
(M#) MAINTENANCE PROCEDURES — personnel maintenance obligatoire — texte MEL :
Lock the associated engine bleed air valve in the closed position (AMM 36-00-00/901).
1. Deactivate the leading edge flaps and slats in the retracted position (AMM 27-81-00/201).
2. Deactivate the associated thrust reverser (AMM 78-31-00/201).
3. Gain access to the engine bleed air valve by opening the appropriate fan cowl panel
(AMM 71-11-02/201) and thrust reverser (AMM 78-31-00/201).
4. Lock the inoperative engine bleed air valve in the CLOSED position.
a) Turn the override nut to align the position indicator with the CLOSED position.
b) Loosen the lock screw/knob bolt and push in locking knob to lock valve in closed position.
c) Re-tighten the lock screw/knob bolt.
5. Close fan cowl panel (AMM 71-11-02/201) and thrust reverser (AMM 78-31-00/201).
6. Activate the thrust reverser (AMM 78-31-00/201).
7. Activate the leading edge flaps and slats (AMM 27-81-00/201).