# SDR IPXA2026080363542

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 1, 2026
- Submitted: August 3, 2026
- Operation: Air carrier
- Aircraft: [N411UP](https://openairdocs.org/aircraft/N411UP), registered now
- Make and model: Boeing 757-24APF
- Registry model: [Boeing 757-24APF](https://openairdocs.org/model/boeing-757-24apf) (OpenAirDocs)
- Aircraft serial: 23851
- Aircraft time: 39,960 hours, 26,760 cycles
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Duct
- Part number: 350081383500838
- Part serial: C4508811
- Condition: Warning Message
- Location: Zone 100
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/IPXA2026080363542

## Discrepancy

LEFT BLD DUCT LEAK EICAS MSG AT F340. QRH CHECKLIST COMPLETED AND L BLD DUCT LEAK MESSAGE WENT AWAY. PERFORMED FIM 26-90-15-00 SHEET 1 FIG 103 STEPS 1,10,2, SHEET 2 FIG 103 STEPS 3,4,11,12,13, & 14, HAD A FAULT CODE 14, PERFORMED STEP 15 FIG 103, SHEET 3.  CARD WOULD NOT RESET.  R&R'D DUCT LEAK DETECTION CARD & WHEEL WELL & DUCT LEAK CARD IAW AMM 20-10-01-024-026 & AMM 20-10-01-424-032. OPS CK'D IAW AMM 26-18-00.  NO FAULTS NOTED. REMOVED PANEL 193EL & CHECKED BOTH LOOPS A & B FOR CONTINUITY & MEASURED FOR RESISTANCE. RESISTANCE FOUND WITHIN RANGE. CLOSED TR & FAN COWLINGS IAW AMM 78-30-00. RAN ENGINE IAW 71-00-00-201 NO FAULTS FOUND. REINSTALLED PANEL 193EL IAW AMM 20-11-00.

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