SDR MYWA110111

Service difficulty report · Valve · Boeing 7378Q8

Difficulty date
November 3, 2011
Submitted
November 9, 2011
Operation
Air carrier
Aircraft
N734MA
Make and model
Boeing 7378Q8
Aircraft serial
30039
Aircraft time
29,319 hours, 10,582 cycles
Part
Valve
Condition
Malfunctioned
Location
Bleed Air Sys
Stage of operation
CR
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

ETOPS SIGNIFICANT SYSTEM: NR 1 ENG BLEED AIR TRIP. PERFORMED NR 1 ENG BLEED HEALTH CHECK IAW TASK 36-11-00-700-801. FOUND HP FAILED AND PCV KISS BAD. RE-ACTIVATED HIGH PRESS VALVE PER MEL 36-9. REMOVED AND REPLACED HIGH STAGE VALVE IAW 36-11-06-800. REMOVED AND RE-INSTALLED PCV. REPLACED KISS SEAL IAW 36-12-02. REPLACED 390 DEGREE THERMOSTAT IAW 36-11-05-400-801.

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