# SDR ABXA20260508191

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 8, 2026
- Submitted: May 8, 2026
- Operation: Air carrier
- Aircraft: [N762CK](https://openairdocs.org/aircraft/N762CK), registered now
- Make and model: Boeing 767-3P6
- Registry model: [Boeing 767-3P6](https://openairdocs.org/model/boeing-767-3p6) (OpenAirDocs)
- Aircraft serial: 26236
- Aircraft time: 96,745 hours, 31,021 cycles
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Isolation Valve
- Condition: Warning Light
- Location: Zone 400
- Stage of operation: TX
- How discovered: O
- Nature of condition: J
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ABXA20260508191

## Discrepancy

AFTER ENGINE START, L BLEED ISOLATION VALVE DISCRETE LIGHT AND YELLOW EICAS MESSAGE ON WHEN VALVE COMMANDED CLOSED. CREW RETURNED TO GATES (BTB). MTC SWAPPED L+C ISOLATION VALVES IAW B767 AMM 36-11-04 OPS/LEAK CHECK GOOD FOR L ISOLATION VALVE AC REMAINS NO ETOPS. A/C RETURNED TO SERVICE.

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