# SDR HNAA2026072000597

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 19, 2026
- Submitted: July 20, 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
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Check Valve
- Part number: 8166033
- Part serial: 3425
- Condition: Abnormal
- 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/HNAA2026072000597

## Discrepancy

STRONG EXHAUST SMELL IN FLT DECK WHEN RUNNING APU AT THE GATE WITH PACK 1.  FOUND APU BLEED VALVE INNER GASKET TO BE WORN. R&R BLEED VALVE REF TO AMM 36-12-03. NO FIX TRANSCRIBED TO LP 391921-3 FOR APU BLEED MEL.    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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