# SDR TWRA9722

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 17, 1997
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N621FF
- Make and model: Boeing 747259B
- Aircraft serial: 21730
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: 3 Way Valve
- Part number: 60B00026
- Condition: Failed
- Location: Nr 2 Engine
- Stage of operation: CL
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/TWRA9722

## Discrepancy

DURING INITIAL CLIMB, NR 2 ENGINE BLEED OVERHEAD LIGHT ILLUMINATED.  BLEED SELECTED CLOSED.  LIGHT STAYED ON.  NR 2 ENGINE WAS THROTTLED BACK TO IDLE. LIGHT WENT OUT AFTER 5 MINUTES. NR 2 THROTTLE ADVANCED WITH NR 1 ENGINE AND NR 2 ENGINE BLEED.  SELECTED CLOSED AND LEFT ISOLATION VALVE SELECTED CLOSED.  DUCT PRESSURE LEFT WENT TO 60 PSI AND OVERHEAT LIGHT CAME BACK ON.  RETURNED TO JFK.  REMOVED AND REPLACED 3-WAY VALVE PER MM 76-34-02.  IDLE RUN PERFORMED PER 71-00-00 TEST NR 3.  OPS CHECK OK.  (X)

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