# SDR UPS01435656

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 19, 2001
- Submitted: April 30, 2001
- Operation: Air carrier
- Aircraft: N525UP
- Make and model: Boeing 747 212B
- Registry model: [Boeing 747 212B](https://openairdocs.org/model/boeing-747-212b) (OpenAirDocs)
- Aircraft serial: 21939
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Autopilot Sys
- Condition: Malfunctioned
- Location: Cockpit
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UPS01435656

## Discrepancy

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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