Specifications

SECTION V
ABNORMAL PROCEDURES
MODEL 560
ENVIRONMENTAL SYSTEM AIR DUCT OVERHEAT (AIR DUCT O'HEAT CAUTION LIGHT ON)
1. TEMP Circuit Breaker (LH Panel) - CHECK IN.
2. Temperature Select Knob - MANUAL.
3. MANUAL HOT/COLD Switch - COLD; hold in this position until overheat light goes out (30
seconds maximum).
NOTE
Operation above 31,000 feet in MANUAL full cold mode may result in the cycle
machine overtemp and shutdown. Refer to Abnormal Procedures, AUTOMATIC
TEMPERATURE CONTROLLER INOPERATIVE.
IF LIGHT DOES NOT EXTINGUISH
4. PRESS SOURCE Select Knob - L or R; reduce power on selected engine, if necessary to control
temperature.
5. ENGINE SYNC Knob - OFF.
IF LIGHT STILL DOES NOT EXTINGUISH
6. Land as soon as practical.
IF LIGHT EXTINGUISHES
4. MANUAL HOT/COLD Switch - RELEASE TO OFF (center position).
5. Temperature Select Knob - AUTOMATIC (select a cooler temperature).
NOTE
If the AIR DUCT O'HEAT light illuminates again, select MANUAL on the Temperature
Select Knob and control temperature with the MANUAL HOT/COLD Switch.
AUTOMATIC TEMPERATURE CONTROLLER INOPERATIVE
1. Temperature Select Knob - MANUAL.
2. MANUAL HOT/COLD Switch - ENSURE NOT MANUAL FULL COLD. Select full manual cold, at
least 12 seconds then actuate at least 3 seconds toward MANUAL HOT.
NOTE
Operation in manual mode, full cold, above 31,000 feet, particularly at low (climb)
airspeed may result in air cycle machine overtemp and shutdown. In the event that
this should occur, refer to Abnormal Procedures, EMERGENCY PRESSURIZATION
ON.
EMERGENCY PRESSURIZATION ON (AUTOMATIC ACTUATION) (EMER PRESS CAUTION LIGHT
ON) AND CABIN ALTITUDE (CAB ALT WARNING LIGHT NOT ON)
Indicates air cycle machine shutdown or failure.
1. NORM PRESS Circuit Breaker (LH panel) - CHECK IN.
2. Temperature Select Knob - ADJUST TO WARMER SETTING (may require manual mode).
3. PRESS SOURCE Select Knob - R, L or NORM.
(Continued Next Page)
I 5-12 Configuration AA 56OMB-01