# SDR UIEA200700236

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 2, 2007
- Submitted: June 22, 2007
- Operation: Air carrier
- Aircraft: N523MC
- Make and model: Boeing 747-2D7B
- Registry model: [Boeing 747-2D7B](https://openairdocs.org/model/boeing-747-2d7b) (OpenAirDocs)
- Aircraft serial: 21782
- Aircraft time: 92,680 hours, 18,927 cycles
- System (JASC): [7532 · Compressor Bleed Valve](https://openairdocs.org/jasc/7532)
- Part: Bleed Valve
- Part number: 73836222
- Condition: Unresponsive
- Location: Nr 4 Engine
- Stage of operation: TX
- How discovered: O
- Nature of condition: J
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA200700236

## Discrepancy

WHILE TAXIING AFTER ENGINE START NR 4 ENGINE BLEED VALVE, VALVE CLOSED LIGHT ON, FOUND NO DUCT PRESSURE, WHEN ISOLATED FOR TROUBLE SHOOTING.  PER MEL 36-5-1 TRANSFERRED TO FROM T0219M, DMI M07-100 ISSUED BY MCC HECTOR, ORANGE PLACARD INSTALLED.

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