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 Anti-Ice Switch
4. Journey log / other instructions (texte MEL) :
Print the following information in the journey log sheet.
• One Engine and Nose Cowl Anti-Ice Valve Inoperative Closed
(LEFT) (RIGHT) ENGINE AND NOSE COWL ANTI-ICE VALVE INOP CLOSED - DO NOT
OPERATE IN KNOWN OR FORECAST ICING
• One Engine and Nose Cowl Anti-Ice Valve Inoperative Open
(LEFT) (RIGHT) ENGINE AND NOSE COWL ANTI-ICE VALVE INOP OPEN -OBSERVE
LIMITATIONS
5. Respecter toutes les restrictions du MEL — ne pas en inventer.
(O) OPERATIONS PROCEDURES — texte MEL :
30-03-03A Valve Inoperative Closed:
Do not operate in icing conditions.
30-03-03B Valve Inoperative Open:
NOTE: Dispatching with an engine and nose cowl anti-ice valve inoperative open will cause the
associated COWL VALVE OPEN light to illuminate bright and the associated Thermal Anti-Ice
(TAI) indication to illuminate amber.
1. Operate with the associated ENG ANTI-ICE switch in the OFF position.
2. Apply adjustments to N1 limits and performance limited weights. Observe maximum operating
temperature restrictions.
3. Inflight, maintain a minimum of 60% N1 on the associated engine in icing conditions.
NOTE: The non-affected engine can be operated at any thrust setting needed to maintain the
desired path and airspeed.
4. During ground operations with the APU running, turn the engine bleed OFF whenever the
associated engine is not running.
5. Apply a fuel mileage decrement of 1.3% to account for the engine and nose cowl anti-ice valve
inoperative open.
6. Apply the following additional fuel mileage decrement to account for flight in icing conditions
which require a minimum of 60% N1 on the associated engine:
a) 2.0% for trip distances less than or equal to 1000 nautical miles.
b) 1.0% for trip distances greater than 1000 nautical miles.
7. All thrust rating limits except Takeoff and Go-Around, are reduced by 1.1% N1.
8. Enroute climb limited weight is reduced by 4,000 lb. (1,810 kg).
NOTE: Enroute climb penalties are based on single engine operating speeds that approximate
maximum lift-to-drag ratio speed. To account for the difference in level off altitude
when operating at other speeds, multiply the enroute climb weight penalty listed
above by the appropriate Enroute Diversion Speed Effects factor
Enroute Diversion Speed Effects
9. At temperatures greater than 50 degrees F (10 degrees C):
a) Takeoff and go-around thrust limits are reduced by 1.4% N1.
b) Takeoff and landing performance limited weights are reduced by 9,500 lb (4,309 kg).
10. For temperatures at or below 50 degrees F (10 degrees C), base performance limited weights on
Engine Anti-Ice ON.
(M) MAINTENANCE PROCEDURES — texte MEL (maintenance ; l’équipage vérifie que c’est fait) :
None required.
(M#) MAINTENANCE PROCEDURES — personnel maintenance obligatoire — texte MEL :
30-03-03A Valve Inoperative Closed:
Prepare the airplane for flight with the engine anti-ice valve inoperative (AMM 30-00-00/901).
1. Set each engine start lever in the CUTOFF position.
2. Open the fan cowl panels (AMM 71-11-02).
3. Position the shutoff valve in the closed position.
a) Loosen the retaining screw on the manual locking assembly.
b) Move the hex shaft to the CLOSED position.
c) Slide the locking assembly up the shaft into the recess in the cover plate.
d) Tighten the retaining screw.
4. Close the cowl panels (AMM 71-11-02).
5. Advise Dispatch. Flight Planning will be affected.
30-03-03B Valve Inoperative Open:
NOTE: Dispatching with an engine and nose cowl anti-ice valve inoperative open will cause the
associated COWL VALVE OPEN light to illuminate bright and the associated Thermal Anti-Ice
(TAI) indication to illuminate amber.
Prepare the airplane for flight with the engine anti-ice valve inoperative (AMM 30-00-00/901).
1. Set each engine start lever in the CUTOFF position.
2. Open the fan cowl panels and thrust reverser (AMM 78-31-00).
3. Position the shutoff valve in the open position.
a) Loosen the retaining screw on the manual locking assembly.
b) Move the hex shaft to the OPEN position.
c) Slide the locking assembly up the shaft into the recess in the cover plate.
d) Tighten the retaining screw.
4. Disconnect, cap and stow the electrical connector from the pressure switch.
5. Close off the 9th stage bleed air supply:
NOTE: Only one high stage valve may be locked in the closed position for dispatch. Dispatch
with the opposite high stage valve inoperative under MEL item 36-9 is not allowed.
a) Manually wrench the High Stage Valve to the CLOSE position.
b) Loosen the position indicator screw.
c) Slide the lock into the recess in the cover plate.
d) Tighten the position indicator screw.
6. Close the fan cowl panels and thrust reverser (AMM 78-31-00).