SDR IPXA10558924

Service difficulty report · Shutoff Valve · Boeing 75724APF

Difficulty date: March 23, 2010
Submitted: March 24, 2010
Operation: Air carrier
Aircraft: N435UP
Make and model: Boeing 75724APF
Aircraft serial: 25466
System (JASC): 3610 · Pneumatic Distribution System
Part: Shutoff Valve
Condition: Inoperative
Location: Rt Engine
Stage of operation: DE
How discovered: O
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

ON DESCENT WITH THE LT PACK OFF, ENCOUNTERED THE CABIN ALTITUDE WARNING. WE SELECTED THE LT PACK ON, DESCENDED TO 10,000, RECOVERED THE CABIN. THE DUCT PRESSURE WAS LOW, SPLIT BETWEEN L & R. R & R RT ENG HPSOV & HIGH STAGE PILOT. RAN RT ENG AMM 71-00-00/501. OPS CKS GOOD.

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