BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
TASK 73-21-01-404-035-C00
3. MEC Installation
________________
A. General
CAUTION: DO NOT INSTALL A MEC UNIT LISTED AS SUSPECT IN CFMI SB 73A-077.
_______ REPLACE WITH A NON-SUSPECT MEC UNIT. A SUSPECT UNIT MAY CAUSE AN IN-FLIGHT SHUT DOWN.
(1)
Obey this caution during all of this task.
(2)
Main Engine Contols (MEC's) that have fluorocarbon (Viton) external seals (Pos- CFMI-SB 73-084) can leak fuel for a short time when they are below -29.2 degrees Farenheit (-34 Celsius) (Modification 1) or below -40 Farenheit (-40 Celsius) (Modification 2). Refer to AMM 71-00-00/501 for the leakage limits.
B. Equipment
(1)
Container - 5 gallon (20 liter) capacity,
for fuel and oil
(2)
Respirator - local purchase
(3)
Wrench Set - MEC/Fuel Pump Nuts Run On/Off, 856A1469G02, CFMI. Optional to 856A1303G01.
(4)
Tool - MEC/Fuel Pump Nuts Removal, 856A1303G01, CFMI. Optional to 856A1469G02.
(5)
Torque Adapter Set - MEC Fasteners, 856A1336G02, CFMI.
C. Consumable Materials
(1)
Grease - Graphite (CP2101) (AMM 70-10-01/201)
(2)
Methyl Ethyl Ketone (MEK) (CP1040), local purchase
(3)
Oil - Lubricating, MIL-L-6081 Grade 1010
(CP2369), local purchase
(4)
Petrolatum - Pure Mineral (CP2102),
local purchase
D. References
(1)
AMM 12-13-11/301, Engine Oil Servicing
(2)
AMM 70-30-01/201, Seals and Gaskets
(3)
AMM 71-00-00/501, Power Plant
(4)
AMM 71-11-02/201, Fan Cowl Panels
(5)
AMM 76-11-08/401, Main Engine Control Fuel Control Box
(6)
AMM 78-31-00/201, Thrust Reverser System
E. Access
(1) Location Zones
101 Flight Compartment, Left
102 Flight Compartment, Right
502/602 Fan Cowl Panels, Left
504/604 Thrust Reversers, Left
506 No. 1 Engine
606 No. 2 Engine
F. Procedure
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73-21-01
ALL ú ú C02 Page 429 ú Nov 12/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
S 864-065-C00
WARNING:_______DO NOT LET ENGINE OIL STAY ON YOUR SKIN. USE ENGINE OIL IN AREA WITH GOOD VENTILATION. ENGINE OIL IS POISONOUS AND CAN BE ABSORBED THROUGH YOUR SKIN. ENGINE OIL FUMES CAN IRRITATE YOUR RESPIRATORY TRACT.
CAUTION: DO NOT LET ALKALINE CLEANING FLUID GET INTO THE ENGINE OIL.
_______ VERY SMALL QUANTITIES OF THIS FLUID CAN CHANGE THE ENGINE OIL. DAMAGE TO EQUIPMENT CAN OCCUR.
(1) Obey the above Warning and Caution through all this procedure.
S 434-036-C00
CAUTION: REPLACE THE FUEL PUMP/MEC SEAL GASKET IF IT IS DAMAGED
_______ (AMM 70-30-01/201). USE NEW O-RINGS AND GASKETS WHEN YOU INSTALL THE FITTINGS IN THE MEC. DAMAGED SEAL GASKETS AND USED O-RINGS CAN CAUSE OIL AND/OR FUEL LEAKAGE.
CAUTION: USE TWO WRENCHES TO INSTALL THE TUBE COUPLING NUTS, ONE TO HOLD
_______ THE FITTING AND ONE TO TIGHTEN THE COUPLING NUT. THIS WILL PREVENT DAMAGE TO THE HARDWARE.
(2)
Do not remove the protective caps from the MEC ports until you install the fittings.
S 434-037-C00
(3)
Install new O-rings, lubricated with petrolatum, on the fittings.
S 434-038-C00
(4)
Install the fittings that follow in the applicable MEC ports:
NOTE: This step is not necessary if the MEC to be installed has all
____
the fittings installed.
NOTE: The VSV ROD fitting is permanently installed on the MEC
____
and is not removed.
(a)
Tighten the VBV OPEN fitting to 270-300 pound-inches
(30-34 Newton meters).
(b)
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