737 MAX Flight Crew Operations Manual
Normal Procedures -
Amplified Procedures
MN-FLT-OH-201
NP.21.43
• Failure of the ENGINE START switch to stay in GRD until the
starter cutout can cause a hot start. Do not re-engage the ENGINE
START SWITCH until engine RPM is below 20% N2;
• If a fluid leak (other than a continuous stream) from any of the
engine drains is discovered during Exterior Inspection, the engine
can be started. Do not perform Single Engine Taxi Out procedures
in this case. If during engine start the ground crew reports a fluid
leak from an engine drain, the engine start may be continued.
-700 and -800 Fleets Only
• With the engine at idle thrust, accelerate to 35% of N1 for 40
seconds. Than return to idle thrust.
• In either case, run the engine at the idle thrust for up to 5 minutes.
• If the fluid leak stops during this time, no maintenance action is
needed.
• If the fluid leak continues after 5 minutes, shutdown the engine for
maintenance action.
-700 and -800 Fleets Only
• If the leak does not exceed 90 drops per minute, the aircraft can be
dispatched with no further action;
• For the first flight of the day, at airport elevations at or above 2.000
feet MSL, if the temperature is below 5ºC / 41ºF, consider placing
the Ignition select switch in BOTH before starting the engines.
This may increase the likelihood of a successful engine start on the
first attempt.
Do the ABORTED ENGINE START checklist if one or more of the
following abort start conditions occur:
• The N1 or N2 does not increase or increases very slowly after the
EGT increases;
• There is no oil pressure indications by the time that the engine is
stable at IDLE;
• The EGT does not increase by 15 seconds after the engine start
lever is moved to IDLE;
• The EGT quickly nears or exceeds the start limit.
March 1, 2021