# SDR USAASB97209

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 28, 1997
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N413US](https://openairdocs.org/aircraft/N413US), registered now
- Make and model: Boeing 737401
- Aircraft serial: 23882
- System (JASC): [2751 · Trailing Flap Position Indicating System](https://openairdocs.org/jasc/2751)
- Part: Switch
- Part number: 21EN1076
- Condition: Dirty
- Location: Te Flaps
- Stage of operation: NR
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/USAASB97209

## Discrepancy

DCA - FL 826 - WHILE EXTENDING FLAPS BETWEEN 1 AND 5 DEGREE GEAR WARNING HORN SOUNDED.  UNABLE TO SILENCE UNTIL GEAR WAS EXTENDED.  RECYCLED WITH SAME RESULTS.  MAINTENANCE CLEANED 10 DEGREE SWITCH (S138), PERFORMED GROUND TEST PER MM 31-26-00.  SYSTEM CHECKS GOOD.  (M)

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