# SDR UPS97522149

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 22, 1997
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N409UP](https://openairdocs.org/aircraft/N409UP), registered now
- Make and model: Boeing 757-24APF
- Registry model: [Boeing 757-24APF](https://openairdocs.org/model/boeing-757-24apf) (OpenAirDocs)
- Aircraft serial: 23731
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Auto Pilot
- Condition: Malfunctioned
- Location: E/E Compt
- Stage of operation: DE
- Nature of condition: F
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UPS97522149

## Discrepancy

INSPECTION TYPE-N/A, AT 13,00O 2 PAK, SPEEDBRAKES GRADUALLY DEPLOYED NORMAL PITCH DOWN F/ DESCENT BUT PITCHDOWN FORCE INCREASED SUBSTANTIALLY WITHOUT PILOT INPUT.  NOSE DROPPED ALMOST 25 DEG NOSE DOWN AND A/S INCREASED TO 340 KTS PASSING THROUGH 1,000 FT WITH CAPT AND FO BOTH PULLING ON YOKE WITH BOTH HANDS.  PERFORMED 30/40 TEST FAULT NOTED PER FIM FOUND C/P D40281P OFF P1-1 MODULE CAPTS LEFT INST PANEL SERVICED C/P PERFORMED 30/40 TEST, CK OK, TEST NR 59 CKS OK.  REMOVED AND REPLACED MCP PER ENGINEERING MIM 22-11-02, TEST 4 CHKS OK.  PERFORMED 30/40 CHK OK.  OPERATED STAB FULL TRAVEL WITH COLUMN TRIM SWS CKS OK, SEE LP 932012 FOR REST OF ACTION.

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