# SDR TWAA9809003

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 7, 1998
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N937F
- Make and model: Doug DC-9-33F
- Registry model: [Doug DC-9-33F](https://openairdocs.org/model/mcdonnell-douglas-dc-9-33f) (OpenAirDocs)
- Aircraft serial: 47409
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Switch
- Part number: 4TL1110B
- Condition: Failed
- Location: Cabin
- 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/TWAA9809003

## Discrepancy

STL - FLT 734 - DURING PRE-FLIGHT CHECK, EMERGENCY EGRESS LIGHTS STAYED ON WITH SWITCH IN ARMED POSITION.  REPLACED EGRESS LIGHT SWITCH MFG PN 4TL11-10B.  OP-15 3-23-98 MCI.  (X)

---
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.