# SDR CALA2025070906386

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 7, 2025
- Submitted: July 9, 2025
- Operation: Air carrier
- Aircraft: [N780UA](https://openairdocs.org/aircraft/N780UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 26944
- Aircraft time: 103,389 hours, 18,811 cycles
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Bleed Air Sys
- Condition: Leaking
- Location: Zone 600
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2025070906386

## Discrepancy

BLEED LOSS WING R EICAS ADVISORY BLEED AIR SUPPLY VALVES ARE LATCHED CLOSED OR THE RESPECTIVE SWI TCHES ARE OFF, SO THAT BLEED AIR IS NOT SUPPLIED TO THE R WAI,  R PACK AND R HYDRAULIC RESERVOIR PRESSURIZATION.  AHM SHOWS DUAL RIGHT BLEED LOOPS 1+2 MSG 'S26-37083,26-39072. CHECKED THE RIGHT A/C BAY FOR BLEED AIR LEAKS WITH DUCT PRESSURE AT 30 PSI WITH PACKS ON. NO LEAKS FOUND. ACP FIRE TEST. FIRE/OVHT WARNING SIGNAL TEST PASSED REF AMM TASK 31-51-00-710-801.

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