# SDR 99ZZZX89

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 10, 1998
- Submitted: March 26, 2000
- Operation: General aviation
- System (JASC): [3418 · Stall Warning System](https://openairdocs.org/jasc/3418)
- Part: Warning Horn
- Part number: S24881
- Condition: Malfunctioned
- Location: Cockpit
- Stage of operation: IN
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/99ZZZX89

## Discrepancy

INSTALLED NEW STALL WARNING REEDS IN 3 AIRCRAFT.  ALL HAD HORN ON ALL THE TIME.  CHECKED REED, FOUND REED SOUNDED WITH BOTH PRESSURE AND SUCTION.  SUBMITTER RECOMMENDS TESTING ALL REED ASSEMBLIES PRIOR TO INSTALLATION BY LIGHTLY BLOWING INTO REED.  THERE SHOULD BE NO TONE HEARD, TONE SHOULD ONLY BE HEARD WITH SUCTION APPLIED.

---
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.