SDR MYWA110023

Service difficulty report · Regulator · Boeing 7378Q8

Difficulty date: February 12, 2011
Submitted: February 17, 2011
Operation: Air carrier
Aircraft: N739MA
Make and model: Boeing 7378Q8
Aircraft serial: 30670
Aircraft time: 16,208 hours, 6,264 cycles
System (JASC): 3610 · Pneumatic Distribution System
Part: Regulator
Part number: 1074847
Condition: Faulty
Location: Bleed Air Sys
Stage of operation: CL
How discovered: O
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

ETOPS SIGNIFICANT SYSTEM: ON CLIMBOUT, PRESSURIZATION CHECK, RIGHT DUCT PRESSURE AT 30 PSI LEFT DUCT PRESSURE AT 45 PSI AT CRUISE, RIGHT DUCT PRESSURE 30 PSI LEFT DUCT PRESSURE 35 PSI. ON DESCENT, RIGHT DUCT PRESSURE AT 25 PSI AND LEFT DUCT PRESSURE AT 25 PSI. REPLACED NR 2 ENGINE HIGH STAGE REGULATOR.

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