# SDR CALA2026010912832

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 8, 2026
- Submitted: January 9, 2026
- Operation: Air carrier
- Aircraft: [N442UA](https://openairdocs.org/aircraft/N442UA), registered now
- Make and model: Airbus A320-232
- Registry model: [Airbus A320-232](https://openairdocs.org/model/airbus-a320-232) (OpenAirDocs)
- Aircraft serial: 780
- Aircraft time: 80,900 hours, 34,129 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Sign
- Part number: 1013101
- Condition: Inoperative
- Location: Zone 200
- 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/CALA2026010912832

## Discrepancy

MULTIPLE EMERGENCY EXIT SIGNS AT 1L AND 1R, 2L AND 2R INOP. FOUND DOOR 2L OVERHEAD INOP, ALL OTHER EMERGENCY LIGHTS WORK NORMAL. REPLACED EXIT SIGN 45WL AT DOOR 2L, NO HELP. NOTICED, WHEN EMERGENCY LIGHTS SWITCH IS SELECTED TO ON POSITION, ALL EMERGENCY LIGHTS ILLUMINATE. WHEN EMERGENCY SWICH IS SELECTED TO ARM OR OFF POSITION AND NO SMOKING SWITCH IS SELECTED TO AUTO POSITION, ALL EXIT SIGNS EXCEPT AT DOOR 2L ADD EMP:U104327 ILLUMINATES. SLAVED A NEW EMERGENCY POWER SUPPLY AND A BATTERY AT DOOR 2L LOCATION (13WL). NO HELP. RETURNED TO ORIGINAL. SLAVED A NEW DEU-B AT 300RH-5 POSITION (DOOR 2L). NO HELP. RETURNED TO ORIGINAL. CHECKED PINS A, B, AND -D TO GROUND AT CONNECTOR 13WL (EMERGENCY POWER SUPPLY AT 2L) WHEN EMERGENCY LIGHTS SWITCH IS AT DIFFERENT POSITIONS. WHEN SELECTED TO OFF, PIN -D READS 108.4 OHMS, PINS A AND B READ OPEN. WHEN SELECTED TO ARM, PIN B READS 108.4 OHMS, ADD EMP:U104327 PINS A AND -D READ OPEN. WHEN SELECTED TO ON, PIN A READS 113.0 OHMS, PINS B AND -D READ OPEN. REF WDM 33-51-03 AND 33-51-01. FOUND CONNECTOR 7245VC PINS C AND E MISWIRED. CORRECTED WIRING REF AWM 33-51-03 PAGE 8 AND 33-51-03 PAGE 8. OPS TEST GOOD

---
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.