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DO NOT REENGAGE THE AUTOPILOT UNTIL THE PROBLEM HAS BEEN IDENTIFIED AND CORRECTED.
1.
Autopilot may be disconnected by: a) Depressing the "AP Disconnect" Switch on the right side of the pilot's control grip. b) Pressing and holding the mode selector knob for approximately 2
seconds.
c) Moving the autopilot master switch to "OFF" position.
d) Pulling the autopilot circuit breaker.
2.
Altitude loss during a malfunction and recovery.
a) The following altitude losses and bank angles were recorded after a malfunction with a 3 second recovery delay:
Configuration Bank Angle/Altitude Loss
Climb / Descent / Cruise 55o / -200'
b) The following altitude losses and bank angles were recorded after a malfunction with a 1 second recovery delay:
Configuration Bank Angle/Altitude Loss
Maneuvering 20o / -20'
Approach (coupled or uncoupled) 15o / -20'
4. NORMAL OPERATING PROCEDURES
NOTE
Refer to all of the Normal Operating Procedures with the following inserted into the appropriate places.
4.4. NORMAL OPERATION CHECKLIST
4.4.1. Preflight Inspection
B. Walk Around Check and Visual Inspection
2. Left Wing j) Autopilot Static Port check clear
4.4.4. Before Taxiing
2a. AP Master Switch ON (if desired)
2b. Autopilot Mandatory Pre-flight Test COMPLETE
Autopilot Mandatory Pre-flight Test
A. Observe all lights and annunciators illuminate.
B. Observe the following light sequence of the trim indicators:
(Sequence requires 9 seconds).
1.
Initially both trim UP and DN lights are illuminated.
2.
UP light extinguishes and remains off.
3.
DN light then extinguishes and remains off.
4.
All lights extinguish except for "RDY" light.
The autopilot can be engaged and disengaged repeatedly using the mode selector knob. The autopilot can be disengaged using the A/P disconnect switch. Once the A/P master is switched off, the test must be reconducted to get a ready indication. If the ready light does not illuminate after the test, a failure to pass the test is indicated and the system will require service.
Altitude mode cannot be engaged unless power is on for more than 15 seconds.
System Functional Test
1.
Push Mode Switch – STB Annunciator illuminates. Rotate “Mode Select” knob left and right. Observe control stick moves in corresponding direction. Centre turn knob.
2.
Set D.G. and place heading bug under lubber line (if installed). Push “Mode Select” knob to engage HDG mode. Observe HDG annunciator. Move HDG bug left and right. Observe proper control stick motion.
3.
Overpower test – Grasp control stick and overpower roll servo left and right. Overpower action should be smooth with no noise or jerky feel. If unusual sound or excessive play is detected, have the servo installation inspected prior to flight.
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