Service difficulty report · Pilot Valve · Boeing 75729J

Difficulty date
September 7, 2022
Submitted
September 12, 2022
Operation
Air carrier
Aircraft
N757QM
Make and model
Boeing 75729J
Aircraft serial
27203
Aircraft time
64,247 hours, 33,687 cycles
Engine
Pwa PW2040
Engine time
76,990 hours, 25,821 cycles
Part
Pilot Valve
Part number
33990047
Part serial
1212
Condition
Faulty
Location
L Eng
Stage of operation
NR
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

LEFT ENGINE BLEED VALVE MSG DURING ENG ANTI ICE OPERATION. HIGH STAGE SYSTEM FOUND FAULTY AND PLACED ON MEL INITIALLY. DURING A BLEED HEALTH CHECK, THE LEFT ENG HIGH STAGE PILOT WAS FOUND FAULTY AND REPLACED. THE HEALTH CHECK WAS PERFORMED AGAIN AND THE HIGH STAGE SYSTEM PASSED PER THE APPLICABLE AMM, THE MEL WAS THEN CLEARED.

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