# SDR CALA2026051716319

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 16, 2026
- Submitted: May 18, 2026
- Operation: Air carrier
- Aircraft: [N77539](https://openairdocs.org/aircraft/N77539), registered now
- Make and model: Boeing 737824
- Aircraft serial: 63642
- Aircraft time: 27,038 hours, 10,220 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery Pack
- Part number: ADD71701100
- 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/CALA2026051716319

## Discrepancy

EMERGENCY ESCAPE LIGHTS FROM ROW 7ABC TO 14ABC, RH OVERWING EXTERIOR LIGHT BETWEEN THE ESCAPE HATCHES AND OVERHEAD AISLE EMERGENCY EXIT SIGN BETWEEN OVERWING ESCAPE HATCHES ARE ALL INOP.  THE OVERWING EMERGENCY LIGHT BETWEEN THE TWO ESCAPE HATCHES THAT IS INOP IS ON THE LH SIDE NOTHE THE RH R/R BATTERY PACK FOR EMERGENCY LIGHTING POWER SUPPLY IRW AMM TASK 33-51-06-960-805. OPS CHK NORMAL

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