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SDR O2JA20160401001

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Service difficulty report · Position Sensor · Lear 35A

FAA SDR system

Difficulty date
April 1, 2016
Submitted
April 1, 2016
Operation
Air carrier
Aircraft
N131AJ
Make and model
Lear 35A
Aircraft serial
381
Aircraft time
17,350 hours, 11,453 cycles
System (JASC)
2210 · Autopilot System
Part
Position Sensor
Part number
509100501
Condition
Defective
Location
Zone 300
Part time
17,350 hours, 11,453 cycles
Stage of operation
CL
How discovered
O
Nature of condition
F
Precautionary procedure
A

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

WHEN THE AUTOPILOT IS ENGAGED IN THE SPEED, ALTITUDE OR NAV MODE THE ACFT NOSE PITCHED UP IN ATTITUDE WITH NO MANUAL INPUT OR CONTROLLED COMMAND GIVEN FOR NOSE UP. THE AUTOPILOT NOSE PITCH UP IN ATTITUDE OCCURRED FOUR TIMES AT FLIGHT LEVEL 8,000 FEET, 21,000 FEET, 32,000 FEET & 36,000 FEET.

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