d.
If an uncommanded nose up pitch attitude change is detected, the pilot should initially attempt to stop the rate with forward cyclic. At airspeeds above 140 KIAS, a col-lective reduction of approximately 3 inches, simultaneously with forward cyclic will arrest the nose up pitch rate. If these control corrections are delayed and/or a large nose up attitude results, a moderate roll to the nearest horizon will assist in returning the aircraft to level .ight. After the nose returns to the horizon, roll to a level attitude. After coordi-nation with the pilot, the copilot should adjust the stabilator to 0° at airspeeds above 40 KIAS and full down at air-speeds below 40 KIAS.
If an uncommanded nose down pitch attitude occurs:
1.
Cyclic -Adjust as required.
2.
Collective -Maintain or increase.
3.
Cyclic mounted stabilator slew-up switch -Ad-just as required to arrest nose down pitch rate.
MAN SLEW switch -Adjust to 0° at airspeeds above 40 KIAS and full down at airspeeds below 40 KIAS.
5. LAND AS SOON AS PRACTICABLE.
If an uncommanded nose up pitch attitude occurs:
1.
Cyclic -Adjust as required.
2.
Collective -Reduce as required.
MAN SLEW switch -Adjust to 0° at airspeeds above 40 KIAS and full down at airspeeds below 40 KIAS.
4. LAND AS SOON AS PRACTICABLE.
9.32 AVIONICS MANAGEMENT SYSTEM MAL-FUNCTIONS.
9.32.1 AMS DUAL CDU AND DUAL MFD FAILURE.
1.
Place EMERGENCY CONTROL PANEL, EMERG COMM switch to EMERG COMM to activate the ARC-164 to 243.0 and to manu-ally control the ARC-222.
2.
LAND AS SOON AS POSSIBLE.
9.32.2 CDU SINGLE AMS FAILURE or BLANK CDU DISPLAY.
1. Verify operating CDU is bus controller (Boxed B on status line).
If operating CDU is not bus controller:
2.
On the EMERGENCY CONTROL PANEL place CDU 1-AUTO-CDU 2 switch to the good CDU.
3.
Check status of good AMS.
If CDU bus controller assignment did not switch to the good CDU, go to CDU DUAL AMS FAILURE.
9.32.3 CDU DUAL AMS FAILURE or BLANK CDU DISPLAYS (NO CDU BUS FUNCTIONS CAN BE ACCOMPLISHED).
1. Wait 10 seconds for AMS CDUs to reinitialize self.
If AMS did not reinitialize self:
2.
Place EMERGENCY CONTROL PANEL, EMERG COMM switch to EMERG COMM to activate the ARC-164 to 243.0 and to manu-ally control the ARC-222.
3.
LAND AS SOON AS PRACTICABLE.
9.32.4 MFD FAILURE.
1.
CDU STS key -Press.
2.
Verify and acknowledge system failures of MFD 1 or MFD 2 by indication of Fail (F).
If MFD went blank or locked up:
9-21
TM 1-1520-253-10
3.
Cycle MFD power switch to OFF, then back to ON.
4.
CDU STS key -Press.
5.
Verify and acknowledge MFD system status change of MFD 1 or MFD 2 by indication of Good (G).
If MFD cycling of power was unsuccessful:
6.
LAND AS SOON AS PRACTICABLE.
If both MFDs have failed:
7.
LAND AS SOON AS POSSIBLE.
9.32.5 DGNS FAILURE.
Failure of DGNS appears as status advisory Bad (B) or locked up MFD displays.
1. CDU STS key -Press.
2. Verify and acknowledge system failure of DGNS by indication of Fail (F).
If DGNS status is indicated Fail (F) on the CDU, or MFDs are locked up, or MFDs display 9X9:
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