SDR 9501651221

Service difficulty report · Bleed Valve · Doug DC1030

Difficulty date: January 28, 1995
Submitted: March 26, 2000
Operation: Air carrier
Aircraft: N221NW
Make and model: Doug DC1030
Aircraft serial: 46579
System (JASC): 7532 · Compressor Bleed Valve
Part: Bleed Valve
Condition: Malfunctioned
Location: Nr 3 Engine
Stage of operation: TO
Nature of condition: J
Precautionary procedure: O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

DURING TAKEOFF, THE NR 3 PNEUMATIC PRESSURE INDICATOR ROSE TO 25 PSI. THE SYSTEM WAS SHUT-OFF PER MEL 36-1F. REDUCING THE ENGINE POWER, THE PRESSURE WOULD DECREASE. REPLACED THE PRSOV (898626-3 S.N 55114), AND THE HIGH STAGE BLEED VALVE (9786980-8 S/N 01088).

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