# SDR ASAA2014072808702

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 28, 2014
- Submitted: July 30, 2014
- Operation: Air carrier
- Aircraft: [N533AS](https://openairdocs.org/aircraft/N533AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35201
- Aircraft time: 14,055 hours, 4,218 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Computer
- Part number: 8221604101
- Part serial: 181NHY
- Condition: Failed
- Location: Autopilot
- Part time: 14,069 hours, 4,224 cycles
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2014072808702

## Discrepancy

AFTER TAKEOFF, ATTEMPTED TO ENGAGE B AUTOPILOT AT 1000' AND HEARD A/P DISENGAGE WARNING PLUS A/P DISCONNECT LIGHT THEN AUTOPILOT RE-ENGAGED AND WORKED UNTIL APPROACH AT 2000' AUTOPILOT B DISENGAGED BY ITSELF.  BOTH F/D SWITCHES WENT TO "MA", RT WING FELT HEAVY ALL THE WAY LANDING.  ACFT GROUNDED.  REPLACED B FCC A/P COMPUTER, OPS CKS GOOD REF 22-11-33 AND 22-11-00 AND 34-36-00 IAW LWMP CK LIST LAND VERIFY AND INTERFACE TESTS GOOD.  HGS SENSOR TEST GOOD. STATUS SCREW MOVED TO CAT 3.

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