# SDR AALA2019081439032

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 12, 2019
- Submitted: August 14, 2019
- Operation: Air carrier
- Aircraft: [N776AN](https://openairdocs.org/aircraft/N776AN), registered now
- Make and model: Boeing 777223
- Aircraft serial: 29582
- Aircraft time: 82,637 hours, 10,013 cycles
- System (JASC): [3397 · Light System Wiring](https://openairdocs.org/jasc/3397)
- Part: Wire Harness
- Condition: Burned
- Location: Cabin Lights
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA2019081439032

## Discrepancy

AIRCRAFT WAS GROUNDED: MAINTENANCE FOUND CABIN LIGHTING SYSTEM TRU1 C/B POPPED.CABIN LIGHTING INOP FOUND 33V AC ON C1 AT C/B C9343 CABIN LIGHTING SYS TRU 1 ALSO FOUND BURNT WIRING NEXT TO TB400.  FOUND L FWD BOOST PUMP GROUND HANDLING C/B POPPED. TROUBLESHOT AND FOUND SM4184 SPLICE BURNT IN THE P320 PANEL. FOUND WIRE # W3241-0062-12 BURNT. FOUND WIRE # W3210-0014-12 BURNT. FOUND WIRE # W3210-0011-12 BURNT. FOUND WIRE # W3216-1102-22 BURNT. FOUND WIRE # W3212-0013-22 INSULATION NIKED. FOUND WIRE # 3211-0027-12 BUNRT. FOUND WIRE # 3241-0059-12 BURNT. FOUND WIRE # 3241-0010-12 BURNT. FOUND WIRE #W3217-1001-22 INSULATION CHAFFED. ACCOMPLISHED REPAIR TO WIRES ON SM4185 WIRES IAW SWPM 20-15-26, 20-30-12, WDM 24-51-41 AND ECO B1091AB.

---
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.