# SDR QC42002F00003

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 6, 2002
- Submitted: December 11, 2002
- Operation: Air carrier
- Aircraft: [N220SA](https://openairdocs.org/aircraft/N220SA), registered now
- Make and model: Beech 58
- Registry model: [Beech 58](https://openairdocs.org/model/beech-58) (OpenAirDocs)
- Aircraft serial: TH2003
- Engine: Cont IO550*
- System (JASC): [2110 · Cabin Compressor System](https://openairdocs.org/jasc/2110)
- Part: Bracket
- Part number: 585550111
- Condition: Broken
- Location: Ac Compressor
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/QC42002F00003

## Discrepancy

DURING INSPECTION, FOUND A MOUNTING LOBE COMPLETELY BROKEN OFF THE BRACKET THAT HOLDS THE AIR CONDITIONER COMPRESSOR ON THE FRONT OF THE LEFT ENGINE.  THIS BRACKET IS ATTACHED TO THE ENGINE CASE WITH 4 BOLTS.  WHILE INSTALLING THE NEW BRACKET, IT REQUIRED INSTALLING SHIMS UNDER SOME OF THE MOUNTING LOBES TO AVOID A PRELOAD CONDITION AFTER THE BOLTS ARE TORQUED.   BRACKET WAS NOT SHIMMED CORRECTLY AT THE FACTORY AND THE BRACKET HAD A LARGE PRELOAD STRESS ON THE LOBES.

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