START VALVE OPEN LIGHT ON IN FLIGHT
Throttle (Affected Engine)................................................................ IDLE PNEU X-FEED Valve Lever (Affected Engine).........................CLOSED PNEU X-FEED Valve Lever (Unaffected Engine).......... AS REQUIRED AIR CONDITIONING SUPPLY
Switch (Affected Engine)................................................HP BLEED OFF AIR CONDITIONING SUPPLY Switch (Unaffected Engine) .............................................................AUTO
IF Airfoil Anti-Ice System Has Two Switches:
Airfoil Anti-Ice Switch (Affected Engine) ................................... OFF
START Switch (Affected Engine) ...................................................... OFF
Engine Start Valve CBs (U41, U42) .................................................PULL
WARNING: START VALVE OPEN annunciation inflight could indicate failure of a pneumatic augmentation valve in the open position. (High pressure bleed air can blow the start valve open even though it is commanded closed by the start switch.) “Free wheeling” of the start valve by unregulated high pressure bleed air will cause the start valve to fail in approximately 1 minute and 15 seconds. Uncontained start valve failure (burst) could lead to engine fire (particularly on the right engine) or severe damage.
Note: Continue normal engine operation at Captain’s discretion. Monitor engine parameters (EPR, N1, EGT, N2, oil pressure/temperature, fuel flow, etc.) for indications of an engine fire or severe damage.
With both crossfeeds closed, pneumatic pressure can be verified using air conditioning gauges. For anti-ice capability, open pneumatic crossfeed of unaffected engine as necessary.
* * * *
Sec. 3 Page 144 MD-80
Rev. 12/01/00 #29 Continental Flight Manual
VOLCANIC ASH PROCEDURES
Airborne weather radar is not designed to detect volcanic dust and can not be relied on for avoidance.
Initial engine indications will be a decrease of N1, N2, EPR, and fuel flow and an increase in EGT. Engine surges and flameout may also occur.
Flight deck indications may appear as smoke/dust and an acrid odor similar to electrical smoke. St. Elmos fire may be visible in the windshields.
During prolonged exposure to ash laden air, use the crew oxygen system at 100%. Manual deployment of passenger oxygen masks is not recommended if the cabin pressure is normal.
Note: This procedure is intended to maximize engine surge protection and to decrease EGT. Lower EGT will minimize accumulation of volcanic material on the turbine vanes.
Depart the area by the shortest route. This may be an immediate descending 180 degree turn. Consider starting the APU to power the electrical system in the event of multiple engine loss.
ENG IGN Switch ...............SYS A OR SYS B / GRD START & CONTIN
Autothrottles ..........................................................................DISENGAGE
Throttles (Terrain Permitting).............................RETARD TO IDLE OR
AS LOW AS PRACTICAL
Immediately advise ATC of descent, review driftdown charts if
applicable, and determine the MEA.
Airfoil & Engine Anti-Ice.......................................................................ON
AIR CONDITIONING SUPPLY Switches........................................AUTO
EGT........................................................................................... MONITOR
Should EGT exceed limits, perform INFLIGHT ENGINE SHUTDOWN CHECKLIST, Section 2. Engine may be restarted if needed for safety of flight.
Airspeed and Pitch Attitude ..................................................... MONITOR
Airspeed indications may be erratic and unreliable or a complete loss of airspeed may occur. Refer to applicable abnormal procedure.
(Continued)
MD-80 Sec. 3 Page 145
Flight Manual Continental Rev. 12/01/00 #29
Restart engines as required using published procedures. If an engine fails to start, repeated attempts should be made immediately. A successful start may not be possible until clear of volcanic ash and within relight envelope. Engines are slow to accelerate at high altitudes. This should not be interpreted as failure to start. Avoid rapid thrust lever movement.
A precautionary landing should be made if damage has occurred to the airplane or abnormal engine operation was observed. Land at the nearest suitable airport.
The abrasive effects of volcanic ash on windshields and landing lights may decrease visibility for approach and landing.
* * * *
Sec. 3 Page 146 MD-80
Rev. 05/15/95 #23 Continental Flight Manual
CIRCUIT BREAKER GUIDE
This listing is in alphabetical order and uses a letter code for the particular panel a circuit breaker is located on. Use the diagrams at the end of the listing to identify and locate the panels. If you don't find a circuit breaker in the standard location, you will find it in the alternate location. 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：MD-80 Flight Manual 麦道80飞行手册 1(103)
