# SDR 97ZZZX772

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 15, 1996
- Submitted: March 26, 2000
- Operation: General aviation
- Filed by: [National Flight Services Inc, repair station DSCR311D](https://openairdocs.org/faa-repair-station/DSCR311D/national-flight-services-inc.md) (OpenAirDocs)
- Engine: Garrtt TPE33112UHR
- System (JASC): [7250 · Turbine Section](https://openairdocs.org/jasc/7250)
- Part: Seal
- Part number: 31070852
- Condition: Cracked
- Location: 1st Stg Turb
- Part time: 10,257 hours
- Stage of operation: IN
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/97ZZZX772

## Discrepancy

SEAL FOUND CRACKED AT SEALING FLANGE.  SB 72-0840 AUTHORIZES INSTALLATION OF THIS PART TO PROVIDE INCREASED SEAL TENSION AGAINST FIRST ROTOR ASSY.  INCREASED TENSION RESULTS IN CRACKING AT FLANGE.  PART IS A CRITICAL LIFE LIMITED ROTATING GROUP COMPONENT.  LIMIT 20,000 CYCLES.  PART TOTAL CYCLES, 10,462.

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