# SDR 97ZZZX4044

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 21, 1997
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N49AT](https://openairdocs.org/aircraft/N49AT), registered now
- Make and model: Piper PA-44-180T
- Registry model: [Piper PA-44-180T](https://openairdocs.org/model/piper-pa-44-180t) (OpenAirDocs)
- Aircraft serial: 448407041
- Engine: Lyc LTO360E1A6
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Rocker Arm
- Part number: LWQ15014
- Condition: Excess Worn
- Location: Lt Eng Valves
- Part time: 605 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/97ZZZX4044

## Discrepancy

605 HOURS TT ON ENGINES.  EXCESSIVE WEAR BEWEEN ROCKER ARM AND FULCRUM.  ONE FAILURE IN-FLIGHT.  INSPECTION OF OTHER ENGINE REVEALED SAME RESULTS.  REPLACED MOST OF THE ROCKER ARMS AND FULCRUMS ON AIRCRAFT.  SUBMITTER RECOMMENDS INSPECTION EVERY ANNUAL OR 100 HOURS.  SUSPECT CAUSE - LACK OF LUBRICATION (DESIGN FLAW).

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