# SDR 17GR201605160002

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 13, 2016
- Submitted: May 16, 2016
- Operation: General aviation
- Aircraft: [N421ES](https://openairdocs.org/aircraft/N421ES), registered now
- Make and model: Cessna 421C
- Registry model: [Cessna 421C](https://openairdocs.org/model/cessna-421c) (OpenAirDocs)
- Aircraft serial: 421C801
- Aircraft time: 7,303 hours
- System (JASC): [7160 · Engine Air Intake System](https://openairdocs.org/jasc/7160)
- Part: Housing
- Part number: 515517525
- Condition: Cracked
- Location: Filter
- Part time: 7,303 hours
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/17GR201605160002

## Discrepancy

CRACKED LT ENGINE FILTER HOUSING. CRACK DISCOVERED WHILE ADJUSTING THE ALTERNATE AIR DOOR. CRACK WAS ON THE FLANGE BETWEEN THE FILTER AND THE ALTERNATE AIR DOOR ASSEMBLY.

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