# SDR HLF2003F00000

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 6, 2003
- Submitted: October 22, 2003
- Operation: Air carrier
- Aircraft: [N149AF](https://openairdocs.org/aircraft/N149AF), registered now
- Make and model: Cessna 421C
- Registry model: [Cessna 421C](https://openairdocs.org/model/cessna-421c) (OpenAirDocs)
- Aircraft serial: 421C0098
- Engine: Cont GTSIO520L
- System (JASC): [8520 · Reciprocating Engine Power Section](https://openairdocs.org/jasc/8520)
- Part: Crankcase
- Condition: Cracked
- Location: Engine
- Part time: 1,242 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/HLF2003F00000

## Discrepancy

CRACKED CRANKCASE AT NR 5 CYLINDER, CRACK IS 6 INCHES LONG, EXCEEDING THE MAX ALLOWED IAW SB 90-17.  PROBABLE CAUSE:  IMPROPER TORQUE OR DEFECTIVE CRANKCASE.  REPORTED TO MFG.

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