SDR HALA2010022300070

Service difficulty report · Switch · Boeing 7673CB

Difficulty date: February 23, 2010
Submitted: February 23, 2010
Operation: Air carrier
Aircraft: N588HA
Make and model: Boeing 7673CB
Aircraft serial: 33466
Aircraft time: 28,393 hours, 5,350 cycles
System (JASC): 4990 · APU Oil System
Part: Switch
Part number: 38760246
Condition: Malfunctioned
Stage of operation: NR
How discovered: O
Nature of condition: N
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 - APU WILL NOT START GOT FAULT LT OIL QTY SHOWED, 25 AFTER SHUTDOWN. VISUALLY CHECKED APU OIL LEVEL, OIL LEVEL AT FULL, BITE CHK APU ECU LAST FLT LEG FAULTED LOW OIL PRESSURE. REMOVED AND REPLACED LOW OIL PRESSURE SWITCH IAW AMM RESTARTED APU ALL CHKS NORMAL, BITE CHK APU ECU ALL OK C/W TASK 49-94-04-206-007 OIL QTY XMTER INSP ALL CHK GOOD.

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