# SDR IPXA2025033121676

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 28, 2025
- Submitted: March 31, 2025
- Operation: Air carrier
- Aircraft: [N257UP](https://openairdocs.org/aircraft/N257UP), registered now
- Make and model: Doug MD-11F
- Registry model: [Doug MD-11F](https://openairdocs.org/model/mcdonnell-douglas-md-11f) (OpenAirDocs)
- Aircraft serial: 48451
- Aircraft time: 83,296 hours, 19,127 cycles
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Bleed Air Sys
- Part number: 11501281
- Part serial: BN114480
- Condition: Inoperative
- Location: Zone 100
- 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/IPXA2025033121676

## Discrepancy

DIVERTED,  LEVEL 1 BLEED AIR 1 OFF. WHEN THE BLEED 1 TRUNED OFF THE BLEED TEMPERATURE WENT RED AND SHOWED APPROXIMATELY 255°C T/S W/REF TO FIM 36-11-01-01 STEPS 1-8 AND 36 .FOUND HIGH STAGE INTERMEDIATE SENSOR T2-1187 FOR PSC 1 FAULTED REPLACED SENSOR W/REF TO AMM 36-11-05. SENSOR PASSES RTS. PERFORMED FIM 36-11-01-01 AGAIN . NO FAULTS FOUND . #1 BLEED AIR SYSTEM OK FOR SERVICE.

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