SDR UIEA2020021320244

Service difficulty report · Switch · Boeing 767316

Difficulty date: February 11, 2020
Submitted: February 17, 2020
Operation: Air carrier
Aircraft: N1381A
Make and model: Boeing 767316
Aircraft serial: 27615
Aircraft time: 87,957 hours, 19,037 cycles
System (JASC): 4900 · Airborne Auxiliary Power Unit (APU) System
Part: Switch
Part number: 43367310044219
Condition: Malfunctioned
Location: Apu
Stage of operation: TX
How discovered: 9
Nature of condition: O
Precautionary procedure: O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

APU ISOLATION VALVE SWITCH SHOWS FLOW R+R INDICATION WHEN PUSHED IN AND OUT.(<P>THIS ITEM DEFERRED UNDER MEL 49-11-01-01, CAT "C", DUE DATE 21 FEB 20. MEL #124545. PLACARD INSTALLED, MX CONTROL NOTIFIED.</P><P>LP 1068786 - M2: REMOVED AND REPLACED KORRY SWITCH SUB ASSY IAW B767 AMM 33-16-02. FUNCTION COMPLIED WITH, OPS CHECK GOOD. THIS CLEARS MDDR 124545.</P>)