# SDR CALA2026081218529

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 11, 2026
- Submitted: August 12, 2026
- Operation: Air carrier
- Aircraft: [N78001](https://openairdocs.org/aircraft/N78001), registered now
- Make and model: Boeing 777224
- Aircraft serial: 27577
- Aircraft time: 127,626 hours, 13,257 cycles
- Engine: Ge GE9094B
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery Pack
- Part number: ADD71701100
- Condition: No Test
- 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/CALA2026081218529

## Discrepancy

EMERGENCY LIGHTS OPS TEST WITH THE CONTROL SWITCHES PROCEDURE,   EMERGENCY EXIT SIGN UPPER AND FWD SIDE AT DOOR 2L, AND ALL ZONE 1 LT FLOOR PROXIMITY LIGHTS DID NOT TURN ON WHEN TESTED.  EMERGENCY LIGHT POWER SUPPLY M33096 BATTERY PACK AT DOOR 2L WAS REPLACED IAW AMM 33-51-06-960-802.

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