# SDR CALA2017022400470

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 24, 2017
- Submitted: February 25, 2017
- Operation: Air carrier
- Aircraft: N116UA
- Make and model: Boeing 747422
- Aircraft serial: 26908
- Aircraft time: 71,974 hours, 8,054 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Condition: Faulty
- 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/CALA2017022400470

## Discrepancy

RIGHT SIDE UPPER OVERWING EMERGENCY LIGHTS 2EA LIGHTS (L1698 & L813) FAILED TO ILLUMINATE DURING EMERGENCY LIGHTS TEST. "A" CHECK JOB CARD  74-3351-1-7105, SSM 33-51-04 PG 103 SHT 1 & WDM 33 -51-41- PG 1 SH 1. AMM 33-51-03. TS PER WDM 33-51-41 PG 1 SHT 1. NR 6VDC POWER AT PIN 15 CONNECTOR DM7920J AT POWER SUPPLY (M7920). REPLACED POWER SUPPLY AND OPS CHECKED GOOD REF 33-51-04/201.

---
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.