# SDR DALA2023062205075

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 21, 2023
- Submitted: June 22, 2023
- Operation: Air carrier
- Aircraft: [N698DL](https://openairdocs.org/aircraft/N698DL), registered now
- Make and model: Boeing 757232
- Aircraft serial: 29911
- Aircraft time: 75,491 hours, 29,639 cycles
- System (JASC): [3600 · Pneumatic System](https://openairdocs.org/jasc/3600)
- Part: Unknown
- Part number: UNKNOWN
- Condition: Unknown
- Location: Unknown
- Stage of operation: CR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: B
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2023062205075

## Discrepancy

SHIP 0698 - PRES/DE - AT FL340 HAD DUAL BLEED TRIP AND SUBSEQUENT PRESSURIZATION ISSUES. PERFORMED EMERGENCY DESCENT. CORRECTIVE ACTION: T/S PERFORMED NO GO ODI PREVENTION. R/R TEMP SENSOR, R/R LT PRSOV, REPLACED FAN AIR TEMP SNSR ON LT & RT SIDE, R/R 10TH SEAL AND COUPLING ON 10TH STAGE CK VLV. C/W PNEUMATIC SYSTEM ENG RUN DATA W/C, ALL CKS OK.

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