(a)
Operate the engine at the low idle. 1) Make sure that the %N2 rpm is in the limits. 2) If it is necessary, adjust the low idle.
(b)
Operate the engine at the high idle. 1) Make sure that the %N2 rpm is in the limits. 2) If it is necessary, adjust the high idle.
(2)
The adjustments for the low idle speed and high idle speed are on the MEC.
(3)
To get access to the adjustment for the high idle, you must remove the adjustment for the low idle.
B.
Equipment
(1)
Alcohol Thermometer - MIL-T-11399, Type ML-5
(or mercury thermometer if not taken aboard
airplane), -40° to 120°F (-40° to 49°C),
|1/2°F (|1/4°C) accuracy
(2)
Container - 5 gallon (20 liter) capacity,
suitable for fuel
C.
References
(1)
AMM 71-00-00/201, Power Plant
(2)
AMM 71-00-01/201, Power Plant-Trim Tables
(3)
AMM 71-11-02/201, Fan Cowl Panels
D.
Access
(1)
Location Zones
506 Engine No. 1
606 Engine No. 2
(2)
Access Panels
5737L/5837R Fan Cowl Assy
5746L/5846R Fan Cowl Assy
5738L/5838R Thrust Reverser Cowl Assy
5739L/5839R Thrust Reverser Cowl Assy
E.
Do the Idle Speed Checks
(1)
Low idle check
S 215-008-C00
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
71-00-00
ALL ú ú C01 Page 519 ú Jul 12/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
TEST NO. 4 - IDLE SPEED CHECK
_____________________________
CAUTION: DO NOT USE THE TOTAL TEMPERATURE INDICATION FROM THE
_______ AIRPLANE FOR THE AMBIENT AIR TEMPERATURE. MAKE SURE THAT YOU GET THE LOCAL BAROMETRIC PRESSURE (NOT CORRECTED TO SEA LEVEL) FROM THE CONTROL TOWER. THIS WILL PREVENT AN INCORRECT TRIM TARGET SELECTION.
DO NOT PUT A MERCURY THERMOMETER ON THE AIRPLANE. MERCURY (FROM A BROKEN THERMOMETER) CAN CAUSE DAMAGE TO THE AIRPLANE COMPONENTS.
(a) Find and make a record of these conditions: 1) Make a record of the ambient air temperature (outside air temperature (OAT)) in the shade of the wheel well of the nose gear.
2) Make a record of the barometric pressure.
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