# SDR CALA2026080518297

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 4, 2026
- Submitted: August 5, 2026
- Operation: Air carrier
- Aircraft: [N896UA](https://openairdocs.org/aircraft/N896UA), registered now
- Make and model: Airbus A319-132
- Registry model: [Airbus A319-132](https://openairdocs.org/model/airbus-a319-132) (OpenAirDocs)
- Aircraft serial: 3144
- Aircraft time: 51,365 hours, 27,471 cycles
- Engine: Iae V2524A5
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Lamp
- Part number: GE1810
- Condition: Corroded
- 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/CALA2026080518297

## Discrepancy

DURING EMERGENCY LIGHT TEST, PTP SHOWS FAULT EPSU EXT LOAD EMER.   RESET POWER TO ASSOCIATED EPSU.  NO FIX. COMPLETED BITE OF EPSU UNIT IAW TSM 33-51-00-810-822-A.  BITE SHOWED EXTERIOR LIGHTS FAULT.  WIRING CHECKED IAW TSM 33-51-00-810-822-A, FOUND RED LED EXTERIOR LIGHTS FAULT ACTIVE ON EPSU 12WL.  SWAPPING EPSU 12WL & 11WL,  RESULTS IN THE FAULT STAYING IN PLACE. RETURNED EPSU TO ORIGINAL LOCATIONS. PERFORMED WIRING CHECKS FOR GROUNDS ON EPSU & ALL RANG OUT NORMAL.  TSM33-51-00-810-822-A SAYS TO CHECK THE WIRING OF THE SLIDE LIGHTS CONNECTOR AND THE BETWEEN APPLICABLE EPSU & RELATED EMERGENCY LIGHTS & REPAIR WIRING. REF ASM 33-51-02 SCH 01 PAGE 120C, DEU-B 300RH1 APPEARS UNRELATED TO EPSU 12WL BUT IS INSTEAD DEU-B 300RH4. REMOVED CEILING PANEL ABOVE ROW 22 TO FIND DEU-B BUT COULD NOT LOCATE. EXTERNAL LOAD FAULT SUGGESTS EITHER EXTERNAL RT OVERWING LIGHT OR RT OVERWING EMERGENCY EXIT SLIDE. SUGGEST WIRING CHECKS OF RH OVERWING LIGHTS AND/OR RH OVERWING SLIDE.  ON INSPECTION OF RT AFT OVERWING EMER LIGHT ASSY, FOUND BULB CORRODED, SEPERATED FROM METAL & SEZED IN LIGHT FIXTURE. R & R RT AFT OVERWING EMERGENCY LIGHT FIXTURE. OPS CHKD GOOD.  CIDS TEST OK. IAW AMM 33-51-15.

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