# SDR 97ZZZM252

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 28, 1997
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N942ML
- Make and model: Doug DC-9-32
- Registry model: [Doug DC-9-32](https://openairdocs.org/model/mcdonnell-douglas-dc-9-32) (OpenAirDocs)
- Aircraft serial: 47478
- System (JASC): [2220 · Speed-Attitude Correction System](https://openairdocs.org/jasc/2220)
- Part: Mach Trim Act
- Part number: 2587284962
- Condition: Malfunctioned
- Location: E/E Compartment
- Stage of operation: CR
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/97ZZZM252

## Discrepancy

BUF - ACY - FLT 869 - AUTO-PILOT SEVERE PITCH UP DURING CRUISE.  REMOVED AND REPLACED MACH TRIM ACTUATOR.  OPS CHECK NORMAL IAW MM 22-20-1.  AUTO-PILOT SYSTEM OPS CHECK NORMAL IAW MM 22-10, CLEARS DMI NR 0134, PLACARDS REMOVED.  (M)

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