# SDR HNAA2026072700635

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 26, 2026
- Submitted: July 28, 2026
- Operation: Air carrier
- Aircraft: [N660CL](https://openairdocs.org/aircraft/N660CL), registered now
- Make and model: Emb EMB-145LR
- Registry model: [EMB EMB-145LR](https://openairdocs.org/model/embraer-emb-145lr) (OpenAirDocs)
- Aircraft serial: 145764
- Aircraft time: 48,820 hours, 46,334 cycles
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Check Valve
- Part number: 8166033
- Part serial: 3425
- Condition: Faulted
- Location: Zone 200
- Part time: 48,824 hours, 46,342 cycles
- Stage of operation: TX
- How discovered: O
- Nature of condition: B
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/HNAA2026072700635

## Discrepancy

SMELL OF EXHAUST FUMES IN FLIGHT DECK   FACT  26JUL26  07:22  ROA   OPERATED PACK 1&2 WITH E2 BLEED AND VERIFIED NO EXHAUST SMELL COMMING FROM PACK SYSTEM. NO DEFECTS NOTED.   26JUL26  12:41  ROA   AIR LEAK WAS PREVIOUSLY FOUND TO BE ON AFT END OF APU BLEED AIR CHECK VALVE ADDITIONAL LEAK WAS FOUND TO BE IN COUPLING AT THE AFT END OF BLEED AIR PIPE WITH THE APU BLEED AIR CHECK VALVE R&R APU BLEED AIR CHECK VALVE IRW AMM 36-12-02 O-RING AT AFT COUPLING WAS FOUND TO BE BROKEN R&R AFT COUPLING O-RINGS AND REINSTALLED ASSOCIATED BLEED PIPE IRW AMM 36-11-09 RAN PACK SYSTEM OFF APU BLEED IN MULTIPLE DIFFERENT CONFIGURATIONS NO SMELL NOTED AT THIS TIME A/C OK FOR SERVICE

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