SDR IPXA2017090221252

Service difficulty report · Shutoff Valve · Boeing 75724APF

Difficulty date: September 1, 2017
Submitted: September 5, 2017
Operation: Air carrier
Aircraft: N437UP
Make and model: Boeing 75724APF
Aircraft serial: 25468
Aircraft time: 23,584 hours, 15,756 cycles
System (JASC): 3610 · Pneumatic Distribution System
Part: Shutoff Valve
Part number: 32143069
Part serial: 1117C
Condition: Inoperative
Location: Rt Engine
Stage of operation: DE
How discovered: O
Nature of condition: J
Precautionary procedure: B, G

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

What was found

EMERGENCY DECLARED, DUIRING DESCENT TO FL 320, THE RIGHT PACK PRESSURE STARTED TO FLUCTUATE SHORTLY AFTER THE RT ENGINE BLEED EICAS INDICATION. THE CABIN ALTITUDE CLIMBED ABOVE 10,000 AND DESCENDED. REPLACED THE RT PRSOV IAW MM 36-11-09-002-017-001. REPLACED RT RFCC IAW MM 36-11-18. PERFORMED AN OPS CHECK IAW MM 36-11-00, CHECKED GOOD.

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