# SDR SWAA2016041250823

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 11, 2016
- Submitted: April 12, 2016
- Operation: Air carrier
- Aircraft: N624SW
- Make and model: Boeing 737-3H4
- Registry model: [Boeing 737-3H4](https://openairdocs.org/model/boeing-737-3h4) (OpenAirDocs)
- Aircraft serial: 27934
- Aircraft time: 63,400 hours, 50,441 cycles
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Duct
- Part number: 332A1033
- Condition: Cracked
- Location: Bleed Air Sys
- 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/SWAA2016041250823

## Discrepancy

DIVERSION & DECLARED EMER.  CABIN STARTED CLIMBING WHILE LEVEL AT CRUISE FL360.  CABIN ALT HORN SOUNDED.  FOUND BLEED DUCT CRACKED AT AFT KEEL BEAM.  R & R BLEED DUCT IAW MM.

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