# SDR CA060313001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 10, 2006
- Submitted: June 6, 2006
- Operation: General aviation
- Make and model: Lear 45LEAR
- Aircraft time: 817 hours
- Engine: Garrtt TFE7312
- System (JASC): [4910 · APU Cowling/Containment](https://openairdocs.org/jasc/4910)
- Part: Seal
- Part number: 70820262
- Condition: Missing
- Location: Apu
- Part time: 956 hours
- 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/CA060313001

## Discrepancy

(CAN) AFTER EXPERIENCING DC POWER DIFFICULTIES OVER SEVERAL TIMES, FURTHER INSPECTION REVEALED WATER STAINS ON TOP OF THE LT AFT POWER DISTRIBUTION PANEL (PDP).  AFTER REMOVING THE PDP COVERS, WHITE POWDER ALUMINUM LIKE CORROSION WAS FOUND INSIDE THE COVERS.  INTERNAL PCB HAD 2 LARGE CORROSION SPOTS OVER SEVERAL CONTACTS.  FOUND DIRECTLY ON TOP OF THE LT AFT PDP WAS A MATING FLANGE FOR APU COOLING.  THIS FLANGE WAS LEAKING WATER FROM RAIN AND FREQUENT AIRCRAFT WASHING.  THE SEALING WAS FOUND TOO THIN ALL OVER THE FLANGE AND SEALING WAS COMPLETELY MISSING WHERE THE 4 RETAINING BOLTS WERE DUE TO FLIGHT VIBRATIONS OVER TIME. (TC NR 20060313001)

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