Service difficulty report · Unknown · Boeing 7673Y0

Difficulty date
September 25, 2019
Submitted
September 27, 2019
Operation
Air carrier
Aircraft
N1181A
Make and model
Boeing 7673Y0
Aircraft serial
26206
Aircraft time
86,260 hours, 21,433 cycles
Part
Unknown
Condition
Malfunctioned
Location
Apu
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

REF MEL 25-AP-01 APU COLD SOAK START UNSUCCESSFUL - 2 ATTEMPTS, FL 410, SAT -59°C, (APU STARTED - RUN MOMENTARILY THEN "APU FAULT" EICAS & SHUTDOWN). (<P>LP 1223468 - M6: WIND MILLED #1 ENG, PUT APU IN MES MODE AND CHECKED SURGE VALVE POSITION. IT WAS NEAR CLOSED BUT NOT FULLY CLOSED. PERFORMED BITE CHECK AND GOT A LOW OIL PRESSURE BITE. DMI 118222 REMAINS OPEN. REF FIM 49-11 FAULT TREE 966.</P><P>LP 1223470 - ITEM 1: APU RELIABILITY COLD START ACCOMPLISHED ON FLIGHT LEG CVG-ONT SAT 49 C FL 360 ,START SUCCESSFUL ON 2ND ATTEMPT. NOTED BY MX. THIS CLEARS DMI 118222. PLACARDS REMOVED. PERFORM APU BITE PROCEDURE IAW FIM 49-11 FT 958. NO FAULTS NOTED. MCC NOTIFIED. </P>)

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