# SDR UPS04442995

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 23, 2004
- Submitted: August 25, 2004
- Operation: Air carrier
- Aircraft: N523UP
- Make and model: Boeing 747-200
- Registry model: [Boeing 747-200](https://openairdocs.org/model/boeing-747-200) (OpenAirDocs)
- Aircraft serial: 22381
- Engine: Pwa JT9D7Q
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Nut
- Condition: Loose
- Location: Switch Assy
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UPS04442995

## Discrepancy

INSPECTION TYPE: N/A,  EMERGENCY LIGHTS ARM SWITCH INTERMITTENTLY INOPERATIVE.  NOTICED UNARMED LIGHT ILLUMINATED.  CYCLED SWITCH ON-ARM/ OFF AND GOT MIXED RESULTS.  WILL NOT STAY ARMED IN ARM POSITION.  TIGHTENED JAM NUT ON SWITCH ASSY. OPS CKS GOOD.

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