# SDR UPS02438891

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 24, 2002
- Submitted: July 26, 2002
- Operation: Air carrier
- Aircraft: N681UP
- Make and model: Boeing 747121
- Aircraft serial: 19661
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Module
- Condition: Malfunctioned
- Location: Cabin
- Stage of operation: IN
- How discovered: C
- Nature of condition: L
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UPS02438891

## Discrepancy

INSPECTION TYPE: PFLT,  EMERGENCY LIGHTS SYSTEM UNARMED LIGHT WILL NOT TEST USING OVERHEAD IND LIGHTS TEST SWITCH.  NOTE:  LIGHT WILL ILLUMINATE WITH EMERGENCY LIGHTS SWITCH IN ON POSITION.  REMOVED AND REPLACED EMERGENCY LIGHT CONTROL MODULE PER 33-51-09, OPS CKS NORMAL AND UNARMED LIGHT ILLUMINATED WITH TEST SWITCH WHEN ON SELECTED.

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