# SDR CNMA2017070001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 17, 2017
- Submitted: July 21, 2017
- Operation: Air carrier
- Aircraft: [N819AX](https://openairdocs.org/aircraft/N819AX), registered now
- Make and model: Boeing 777-2U8
- Registry model: [Boeing 777-2U8](https://openairdocs.org/model/boeing-777-2u8) (OpenAirDocs)
- Aircraft serial: 33681
- Aircraft time: 44,089 hours, 7,168 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Sleeve
- Condition: Damaged
- Location: Heat Exchanger
- 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/CNMA2017070001

## Discrepancy

BLEED LEAK L FOLLOWED BY BLEED LOSS WING L.  REMOVED AND REPLACED THE SLEEVE AT HEAT EXCHANGER PRIMARY CHECK VALVE IAW AMM 21-52.   OPS CHECKED GOOD.   LT PACK SYSTEM NO DEFECTS NOTED

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.