When tail de-ice is required, push and hold TAIL de-ice button in for 2. minutes.
* * * *
Sec. 3 Page 100 MD-80
Rev. 05/15/95 #23 Continental Flight Manual

TAIL DE-ICE ON LIGHT ON CONTINUOUSLY

WING & TAIL VALVES C/B (M-24).............................PULL OPEN

Note: Opening this circuit breaker will cause the wing anti-ice valve
to open and the tail anti-ice valve to close. 
IF  AIRFOIL ICE PROT PRESS ABNORMAL Light Comes On: 
OR  When tail de-ice is required, reset WING & TAIL VALVES C/B for 2.5 minutes. Observe AIRFOIL ICE PROT PRESS ABNORMAL light goes off. After 2.5 minutes, pull C/B. Repeat as required. 
* * * * 
IF  AIRFOIL ICE PROT PRESS ABNORMAL Light Remains Off: 
AIR FOIL Anti-Ice Switch(es) ................................................ OFF 
PNEU X-FEED VALVE Levers.........................................CLOSE 
Avoid icing areas. If unable to avoid icing areas, refer to AIRFOIL ICE PROTECTION INOPERATIVE, this section. 
* * * * 

MD-80 Sec. 3 Page 101
Flight Manual Continental Rev. 05/15/95  #23

WINDSHIELD CRACKED OR HEAT INOPERATIVE

IF Windshield is Cracked:

IF Outer Glass (Pane) is Cracked:

Pull respective WINDSHIELD ANTI-ICE C/B: Left X-24 / Center X-25 / Right Z-24
OR
Limit airspeed below 10,000 feet to 315 KIAS.
* * * *

IF Inner Glass (Pane) is Cracked:
OR
If applicable, pull respective WINDSHIELD ANTI-ICE C/B:
Left X-24 / Center X-25 / Right Z-24
Pull respective ANTI-FOG C/B:
Capt F/O & Ctr X-26 / Clearview & Eyebrow Z-26
Limit airspeed below 10,000 feet to 235 KIAS.

* * * *

IF Windshield Is Not Cracked:
Note:  Ice buildup at the edges of windshields is not a positive indication of inoperative windshield heat. The left and right windshields consist of primary and secondary de-ice areas. Under severe icing conditions, the secondary de-ice area may not completely de-ice. Due to the geometry of these windshields, the heat flow to the secondary de-ice area is not adequate to remove the ice.
WINDSHIELD ANTI-ICE & ANTI-FOG C/B’S ....................................RESET IF TRIPPED
Anti-Ice: X-24, X-25, Z-24 / Anti-Fog: X-26, Z-26
IF Windshield Anti-Ice Is Inoperative:
Limit speed below 10,000 feet to 315 KIAS.

* * * *
Sec. 3 Page 102 MD-80
Rev. 05/15/95 #23 Continental Flight Manual

WING ANTI-ICE ON LIGHT IS OFF WITH
AIR FOIL ANTI-ICE SWITCH(ES) ON

AIRFOIL ADVISORY & PRESSURE ABNORMAL CAUTION C/B (M-21)................RESET IF TRIPPED
PNEU X-FEED VALVE Levers ...............................................CLOSE

IF  AIRFOIL ICE PROT PRESS ABNORMAL Light Remains Off: 
Confirms inoperative anti-ice system. Avoid icing areas. 
AIR FOIL Anti-Ice Switch(es) ................................................ OFF 
OR  If unable to avoid icing areas, refer to AIRFOIL ICE PROTECTION 
INOPERATIVE, this section. 
* * * * 
IF  AIRFOIL ICE PROT PRESS ABNORMAL Light Comes On: 
PNEU X-FEED VALVE Levers........................................... OPEN 
- - - - - AFTER ONE MINUTE - - - - -
IF  AIRFOIL ICE PROT PRESS ABNORMAL Light Remains On: 
AIR FOIL Anti-Ice Switch(es) ......................................... OFF 
PNEU X-FEED VALVE Levers..................................CLOSE 
OR  Avoid icing areas. If unable to avoid icing areas, refer to 
AIRFOIL ICE PROTECTION INOPERATIVE, this section. 
* * * * 
IF  AIRFOIL ICE PROT PRESS ABNORMAL Light Is Off: 
Confirms WING ANTI-ICE ON light circuit malfunction. Continue 
normal operation. 
* * * * 

MD-80  Sec. 3 Page 102-A 
Flight Manual  Continental  Rev. 01/01/00 #28 
WING HTR INOP LIGHT ON 

Circuit Breaker H-26 UPPER WING ANTI-ICE............................PULL

This will remove all power to the Upper Wing Anti-Ice system, allowing the system to reset when repowered.
- - - - - AFTER TWO MINUTES - - - - -
Circuit Breaker H-26 UPPER WING ANTI-ICE......................... RESET

- - - - - AFTER TWO MINUTES - - - - -
IF WING HTR INOP Light Is ON:
Circuit Breaker H-26 UPPER WING ANTI-ICE.....................PULL

The system is inoperative.
* * * *
Sec. 3 Page 102-B MD-80
Rev. 01/01/00 #28 Continental Flight Manual

INTENTIONALLY LEFT BLANK

MD-80 Sec. 3 Page 103
Flight Manual Continental Rev. 08/01/98  #27

AHRS ALIGNMENT / REALIGNMENT ON THE GROUND
　
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