SDR UPS07650507

Service difficulty report · A/C Pack · Boeing 76734AF

Difficulty date: August 27, 2007
Submitted: August 31, 2007
Operation: Air carrier
Aircraft: N309UP
Make and model: Boeing 76734AF
Aircraft serial: 27740
System (JASC): 2150 · Cabin Cooling System
Part: A/C Pack
Condition: Inoperative
Location: Left
Stage of operation: IN
How discovered: 9
Nature of condition: O
Precautionary procedure: K

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

What was found

INSPECTION TYPE:ETOP RIGHT SYSTEM DUCT PSI LOW, IN FLIGHT AT FL 290 RIGHT DUCT PSI WAS 10 LEFT PACK OFF AIRCRAFT WAS NOT MAINTAINING CABIN ALTITUDE. RECONNECTED HPC ELECTRICAL CONNECTOR. REF MM 36-11-00-5. REPLACED PRSOV PER MM 36-11-09-2. OPS CHECKED SYSTEM, CHECKS OK OPS CHECKED VALVE, CHECKS OK.

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