SDR MYWA120017

Service difficulty report · Valve · Boeing 7378Q8

Difficulty date: February 4, 2012
Submitted: February 10, 2012
Operation: Air carrier
Aircraft: N742MA
Make and model: Boeing 7378Q8
Aircraft serial: 30675
Aircraft time: 27,774 hours, 11,423 cycles
System (JASC): 3610 · Pneumatic Distribution System
Part: Valve
Condition: Stuck
Location: Bleed Air Sys
Stage of operation: IN
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 WALKAROUND, WITH APU BLEED ON, LOUD AIR NOISE COMING FROM NR 2 ENGINE INTERNAL. T/S AND FOUND HIGH STAGE VALVE STUCK OPEN, REMOVED HSV AS PER AMM 36-11-03. INSTALLED HIGH STAGE VALVE ON NR 2 ENGINE IAW B737-800 M/M 36-11-06, OPS CHECK NORMAL.

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