# SDR DHL2001727552

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 17, 2001
- Submitted: September 14, 2001
- Operation: Air carrier
- Aircraft: [N727DH](https://openairdocs.org/aircraft/N727DH), registered now
- Make and model: Boeing 727-200
- Registry model: [Boeing 727-200](https://openairdocs.org/model/boeing-727-200) (OpenAirDocs)
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Duct
- Part number: 65602411
- Condition: Cracked
- Location: Heat Exchanger
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DHL2001727552

## Discrepancy

ON C-CHECK LEFT PRIMARY H/E U-DUCT HAS CRACKED FLANGE.  REMOVED LT PRIMARY H/E DUCT FOR SEND OUT TO REPAIR PER B-727 IAW MM 21-55-11.  INSTALLED LT PRIMARY H/E DUCT PER B-727 MM 21-55-11.  LEAK CHECKED GOOD LT PRIMARY H/E DUCT IAW MM 21-55-11.  OPS CHECK LT PRIMARY H/E DUCT PER B-727 MM 21-55-21.

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