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CKPT ALT cause
cockpit pressure altitude above 19,000 feet
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CKPT ALT procedure
- 1. OBOGS - MAX (as required)
- 2. Descend below 25,000 feet MSL
- 3. Bleed air inflow switch- HI
- 4. Land as soon as practicalIF COCKPIT ALTITUDE EXCEEDED 25,000 FEET MSL
- 5. Land as soon as possible
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DUCT TEMP cause
Enviornmental duct or defog duct above 300 F
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DUCT TEMP procedure
- 1. Cockpit temperature controller - Move toward MANUAL COLDIF CONDITIONS PERSIST
- 2. Defog switch - OFFIF CONDITIONS PERSIST
- 3. Bleed air inflow switch - OFF
- 4. Descend - Below 25,000 feet MSL
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HYDRO FL LO cause
HYD reservoir fluid level below 55 cubuic inches (1qt)
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HYDRO FL LO procedure
- 1. Hydraulic pressure - Check
- 2. Airspeed - 150 KIAS or below
- 3. Landing gear handle - Down
- 4. Flaps - Extend (As required)
- 5. Land as soon as practical
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BUS TIE cause
Bus tie switch open, or bus tie failure
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BUS TIE procedure
- 1. Bus tie switch - NORMIF BUS TIE ANNUNCIATOR REMAINS ILLUMINATED
- 2. Land as soon as practical
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FUEL BAL cause
Fuel imbalance exceeds 30 lbs, or fuel probe fail
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FUEL BAL procedure
- 1. Fuel gages - Verify imbalance and check for fuel leaks
- 2. Fuel imbalance switch - MAN/RESET (M FUEL BAL annunciator illuminates)
- 3. Manual fuel balance switch - To low tank
- 4. Fuel gages - Monitor
- 5. Manual fuel balance switch - OFF, when imbalance is corrected
- 6. Fuel balance switch - AUTO, if desiredIf system is returned to autobalance, monitor for correct operation
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EHYD PX LO cause
Emergency hydraulic pressure at or below 2400 psi
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EHYPD PX LO procedure
- 1. Hydraulic pressure - Check
- 2. Airspeed - 150 KIAS or below
- 3. Landing gear handle - Down
- 4. Flaps - Extend (As required)
- 5. Land as soon as practical
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OBOGS TEMP cause
OBOGS temperature above 200 F
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OBOGS TEMP procedure
- 1. Green Ring - PULL (as Required)
- 2. OBOGS - OFF (BOTH)
- 3. Descend - Below cabin altitude of 10,000 feet
- 4. Land as soon as practical
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TAD FAIL cause
Rudder trim aid device failure
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TAD FAIL procedure
- 1. AHRS/TAD circuit breaker (right console) - Pull and reset
- 2. TAD switch - Engage after TAD FAIL annunciator extinguishes
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L FUEL LO cause
R FUEL LO cause
Left/Right wing tank below 110 lbs usable fuel
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PMU STATUS cause
PMU has detected and accommodated a fault in-flight or WOW switch failure
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PMU STATUS procedure
- ON GROUND:
- 1. PMU switch - OFF, then NORMIf PMU STATUS annunciator remains illuminated, confirm source of fault prior to flight
- INFLT:
- 1. The PMU has detected a discrepancy in the weight on wheels switch. A reset is not possible.
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