# SDR 95ZZZX1820

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 22, 1995
- Submitted: March 26, 2000
- Operation: General aviation
- Filed by: [Aero Controls, LLC, repair station IU6R626N](https://openairdocs.org/faa-repair-station/IU6R626N/aero-controls-llc.md) (OpenAirDocs)
- Make and model: Boeing 737*
- System (JASC): [2740 · Stabilizer Control System](https://openairdocs.org/jasc/2740)
- Part: Brake Spring
- Part number: 6977851
- Condition: Broken
- Location: Horiz Stab
- Part time: 14,307 hours
- Component: 65C347514
- Stage of operation: IN
- Nature of condition: L
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/95ZZZX1820

## Discrepancy

THE HORIZONTAL STABILIZER TRIM GEARBOX FAILED THE AUX BRAKE TEST.  UPON DISASSEMBLY, SPRINGS WERE FOUND SHATTERED.  THIS CONDITION HAS BEEN FOUND AND REPORTED IN PREVOUS MDR'S.  PER BOEING TELEX AEO-AUB-94-0195RR, THE (DASH 1) SPRINGS ARE TO BE REPLACED WITH (DASH 2) SPRINGS AS SUBMITTER SUGGESTS THE (DASH 1) SPRINGS HAD IMPROPER HEAT TREAT OR INCORRECT ALLOYS IN THE SPRINGS.

---
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.