# SDR 95ZZZX1483

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 7, 1995
- 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 TPE33112UAR
- System (JASC): [7250 · Turbine Section](https://openairdocs.org/jasc/7250)
- Part: Seal
- Part number: 31038391
- Condition: Cracked
- Location: Hot Section
- Part time: 6,117 hours
- Component: Garrtt, 31033152
- 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/95ZZZX1483

## Discrepancy

DURING HOT SECTION INSPECTION, FOUND PART CRACKED.  SB 72-0840 AUTHORIZES INSTALLATION OF EITHER PN 3103315-05 OR PN 31070825-2 TO PROVIDE INCREASED SEAL PLATE TENSION AGAINST FIRST ROTOR ASSY.  THIS PARTICULAR PART WAS MODIFIED TO PN 3107085-2 BY INCORPORATING A SHIM BETWEEN THE ROTATION AIR SEAL AND THE CURVIC COUPLING, BUT WAS NOT RE-IDENTIFIED.  SUBMITTER BELIEVES THIS INCREASED TENSION IS CAUSING THIS PART TO CRACK.  SUGGEST ALLIED SIGNAL ENGINEERING REVIEW THIS PROBLEM.  SUBMITTER NOTE:  THIS IS SECOND ASSY FOUND CRACKED.

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