SDR UIEA2021081201788

Service difficulty report · Valve · Boeing 76731K

Difficulty date: August 12, 2021
Submitted: August 16, 2021
Operation: Air carrier
Aircraft: N1489A
Make and model: Boeing 76731K
Aircraft serial: 27206
Aircraft time: 110,019 hours, 22,065 cycles
System (JASC): 4950 · APU Bleed Air System
Part: Valve
Part number: 97980612
Part serial: 293
Condition: Failed
Location: Apu Pneumatic Sy
Stage of operation: TX
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

APU PNEUMATICS INOP(<P>ITEM TRANSFERRED TO MDDR 151753 PER MEL 49-11-01-01, CAT C. DUE DATE 22-AUG21.</P> / <P>LOGPAGE 1402488 ITEM 4: PERFORMED FIM 49-11 F/T 958, FOUND REVERSE FLOW FAULT DISPLAYED. REMOVED AND REPLACED SURGE CONTROL VALVE. OPS CKS GOOD. THIS CLEARS DMI 151753, PLAC REMOVED.</P>)

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