SDR UPS01636828

Service difficulty report · Valve · Boeing 767300

Difficulty date: September 18, 2001
Submitted: September 19, 2001
Operation: Air carrier
Aircraft: N306UP
Make and model: Boeing 767300
Aircraft serial: 27759
System (JASC): 3610 · Pneumatic Distribution System
Part: Valve
Condition: Malfunctioned
Location: Bleed Air
Stage of operation: TX
How discovered: O
Nature of condition: O
Precautionary procedure: H

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

What was found

INSPECTION TYPE:ETOP LEFT DUCT PRESSURE FLUCTUATES W/ENGINE RUNNING AND BLEED SWITCH ON. AFTER TAKEOFF PRESSURE DROPPED BELOW 20 PSI & ROSE ABOVE 60 PSI. TURNED LEFT PACK OFF AND LEFT ENG BLEED SWITCH OFF. DEF LEFT ENG PRSOV PER MEL 36-11-1-1. C/W DMP 36-11-1. PER FIM 36-10-00 FIG 109 FAN AIR MODULATING VALVE DEF. R&R FAV PER 36-11-16. PERFORMED AIR SUPPLY BITE CHECK & NO FAULTS. OK FOR SERVICE.

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