# SDR DLM88060722

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 4, 2006
- Submitted: September 11, 2006
- Operation: Air carrier
- Aircraft: N992DL
- Make and model: Doug MD-88
- Registry model: [Doug MD-88](https://openairdocs.org/model/mcdonnell-douglas-md-88) (OpenAirDocs)
- Aircraft serial: 53344
- Aircraft time: 38,661 hours, 29,393 cycles
- System (JASC): [2740 · Stabilizer Control System](https://openairdocs.org/jasc/2740)
- Part: Actuator
- Part number: 95906
- Part serial: 2529
- Condition: Intermittent
- Location: Vert Stab
- Stage of operation: AP
- How discovered: O
- Nature of condition: F
- Precautionary procedure: L
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DLM88060722

## Discrepancy

LOST PRIMARY TRIM CONTROL USING THUMB SWITCHES ON PILOTS CONTROL WHEEL DURING APPROACH.  EXECUTED MISSED APPROACH AND FLEW APROX 5 MIN WHEN PRIM TRIM CONTROL RETURNED TO PILOTS CONTROL WHEELS.  CHECKED BOTH CONTROL WHEEL SWITCHES AT ALL TIMES.  REPLACED PRIMARY AND ALTERNATE LONGITUDINAL TRIM ACTUATORS PER M/M.  OPS CK PRIMARY AND ALT OK PER M/M.  NOT AN RII ITEM.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.