# SDR IU62001F00003

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 27, 2001
- Submitted: July 31, 2001
- Operation: Air carrier
- Make and model: Boeing 757
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Guide
- Part number: 31628086
- Condition: Separated
- Location: Pilot Valve
- Component: Pilot Valve, Alidsg
- Component part number: 10746014
- 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/IU62001F00003

## Discrepancy

MALFUNCTION:  PACKING,  PN 561-515-0003, IS SEPARATING FROM THE GUIDE ASSEMBLY CAUSING THE OVERPRESSURE SWITCHER TO FAIL.  THE PACKING IS INSTALLED USING ADHESIVE ECCOBOND 104.  PROBABLE CAUSE:  THE ADHESIVE APPEARS TO BREAKDOWN UNDER HEAT AND/OR HAS A REACTION WITH THE LUBRICANT, BRAYCOTE 601, CAUSING THE PACKING TO SEPARATE.  UNIT TSR 773:22 HOURS BEFORE FAILURE.

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