SDR UPS99531243

Service difficulty report · Bleed Valve · Boeing 75724APF

Difficulty date: December 31, 1999
Submitted: March 26, 2000
Operation: Air carrier
Aircraft: N410UP
Make and model: Boeing 75724APF
Aircraft serial: 23732
System (JASC): 7532 · Compressor Bleed Valve
Part: Bleed Valve
Condition: Inoperative
Location: Lt Engine
Stage of operation: CL
Nature of condition: J
Precautionary procedure: H

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

What was found

AIR TURN BACK, EICAS MSG CABIN ALTITUDE DISPLAYED. CABIN ALT AND CABIN ALTITUDE LIGHTS ILLUMINATED. ALSO, L ENG BLEED OFF MSG ON EICAS ALONG WITH L ENG BLEED AIR LIGHT ON. DUCT PRESSURE AT ZERO. DEFERRED LEFT ENGINE BLEED PER MEL 36-77-7. PERFORMED BITE TEST PER 21-30-00, FIGURE 103, OF CABIN PRESSURE CONTROLLER WITH NO FAILURE NOTED.

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