Air Conditioning & Pressurization; Duct Overheat; Automatic Temperature Control Failure - Hawker Beechcraft Hawker 850XP Flight Manual

Hawker 850XP Pro Line 21 Airplane Flight Manual
AIR CONDITIONING & PRESSURIZATION

DUCT OVERHEAT

CABIN TEMP (if installed)..........................................CPIT
CABIN TEMP selector ...............................................Manual - Hold full COOL
NOTE: Temperature changes in MANUAL mode should be made by short applications of
the control. Allow sufficient time for each change to take effect.
If Warning Persists
CABIN TEMP selector ...............................................AUTO - Full COOL
If Warning Persists
MAIN AIR VLVs 1 & 2 ................................................LP ON
Wait 2 Minutes - If Warning Persists
No. 2 Engine ..............................................................Increase power to a high setting
MAIN AIR VLVs 1 & 2 ................................................CLOSE
F/DK VLV ...................................................................OPEN fully
Any Time Warning Ceases
CABIN TEMP selector ...............................................Use in current mode
NOTE: With the F/DK VLV open, the hot bleed air can maintain a cabin altitude of
approximately 9000 ft at 40,000 ft airplane altitude, assuming no abnormal leaks
in the cabin. The temperature in the flight compartment and cabin will become
very hot.

AUTOMATIC TEMPERATURE CONTROL FAILURE

CABIN TEMP (if installed)..........................................CPIT
CABIN TEMP selector ...............................................Manual - Select COOL or HOT as
NOTE: Temperature changes in MANUAL mode should be made by short applications of
the control. Allow sufficient time for each change to take effect.
If the MANUAL Temperature Control is Not Effective, Proceed as Follows
(a) If the Temperature is Too Low
MAIN AIR VLV No. 2 ..................................................LP ON
F/DK VLV ...................................................................OPEN as required
(b) If the Temperature is Too High
MAIN AIR VLVs 1 & 2 ................................................LP ON
FAA Approved
Original Issue: Feb 28, 2006
Sub-section - 4.05
ABNORMAL PROCEDURES
For Training Purposes Only
DUCT
OVHT
required.
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