# SDR HNAA0800289

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 14, 2008
- Submitted: October 8, 2008
- Operation: Air carrier
- Aircraft: N825EX
- Make and model: Dhav DHC8102
- Aircraft serial: 388
- System (JASC): [3620 · Pneumatic Indicating System](https://openairdocs.org/jasc/3620)
- Part: Pressure Switch
- Part number: 7821004
- Part serial: 3984
- Condition: Stuck
- Location: Bleed Air Sys
- Part time: 34,111 hours, 34,111 cycles
- Stage of operation: NR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/HNAA0800289

## Discrepancy

NR2 ENGINE BLEED HOT CAUTION LIGHT ILLUMINATED DURING FLIGHT.  LIGHT GOES OUT WHEN SWITCH SELECTED OFF, FERRYING TO SBY.  R&R D BLEED OVERTEMP SWITCH IAW AMM 21-11-26 NO FIX.  R&R D NR2 ENGINE HP BLEED VALVE.  INSTALLING NEW USING RETAINED HARDWARE, AND REMOVED, CLEANED, REINSTALLED HP SENSING LINE.  R&R NR2 HP PRESSURE SWITCH.  IAW AMM 21-11-21.  R&R D NR 2 PRSOV. IAW AMM 21-11-11.  R&R D NR 1 ENGINE HP PRESSURE SWITCH IAW AMM 21-11-21.  OPS CHECK GOOD.

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