SDR UPS01435656

Service difficulty report · Autopilot Sys · Boeing 747212B

Difficulty date: April 19, 2001
Submitted: April 30, 2001
Operation: Air carrier
Aircraft: N525UP
Make and model: Boeing 747212B
Aircraft serial: 21939
System (JASC): 2210 · Autopilot System
Part: Autopilot Sys
Condition: Malfunctioned
Location: Cockpit
Stage of operation: IN
How discovered: V
Nature of condition: O
Precautionary procedure: K

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

What was found

INSPECTION TYPE:IN AUTO PILOT PITCHES IN LEVEL FLT. P1 TARGET ALERT H197877 IN LEVEL FLIGHT AUTOPILOT PULSED YOKE FORE/AFT WHEN AUTOPILOT WAS DISENGAGED LARGE FORCES IN THE PITCH AXIS WERE BEING HELF W AUTOPILOT REF LOGPAGE 575644 BLOCK 2 WRITE UP REMOVED AND REPLACED CADC (CAPT SIDE) PER MM 34 12 00 AUTOPILOT CHECKS NORMAL PER MM 22 10 00

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