# SDR 99ZZZX106

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 21, 1998
- Submitted: March 26, 2000
- Operation: General aviation
- Engine: Cont IO520D
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Valve
- Part number: 652956
- Condition: Mismanufactured
- Location: Engine
- Component: 654651
- Stage of operation: IN
- Nature of condition: W
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/99ZZZX106

## Discrepancy

PURCHASED 4 NEW VALVES, (2 INTAKE AND 2 EXHAUST) IN LIEU OF TCM SB 98-1B.  ONE EXHAUST VALVE, THE SUBJECT OF THIS REPORT, WAS FOUND TO BE .0005 INCH UNDER THE MINIMUM NEW PART DIMENSION PER TCM OVERHAUL MANUAL TABLE OF LIMITS.

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