# SDR 2005UALA00918

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 28, 2005
- Submitted: September 6, 2005
- Operation: Air carrier
- Aircraft: [N788UA](https://openairdocs.org/aircraft/N788UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 26942
- Aircraft time: 26,561 hours, 5,597 cycles
- Engine: Pwa PW4090
- System (JASC): [7297 · Turbine Engine System Wiring](https://openairdocs.org/jasc/7297)
- Part: Terminal Block
- Part number: CTB9000
- Condition: Overheated
- Location: Nr 1 Engine
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2005UALA00918

## Discrepancy

NR 1 ENGINE UPPER IDG TERMINAL BLOCK HAS MELTED AREAS AND MISSING SHRINK WRAP ON WIRES.  THE IDG STRUT DISCONNECT TERMINAL BLOCK INSPECTION/TORQUE CHECK ACCOMPLISHED AT THE SEGMENTED 'A' DISCOVERED THE OVERHEATED TERMINAL BLOCK.  REVIEW OF IDG WRITE-UPS, LOGBOOK, AND MAINTENANCE MESSAGES PRIOR TO DISCREPANCY DID NOT INDICATE ABNORMAL IDG OPERATING CONDITIONS OR IN-SERVICE DIFFICULTIES.  PHASE 'B' INITIALLY OVERHEATED POSSIBLY DUE TO IMPROPER TORQUE CAUSING THE CABLE LUGS TO LOOSEN AND OVERHEAT WITH HIGH RESISTANCE.

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