SDR DLM88970361

Service difficulty report · Control Unit · Doug MD88

Difficulty date: February 26, 1997
Submitted: March 26, 2000
Operation: Air carrier
Aircraft: N934DL
Make and model: Doug MD88
Aircraft serial: 49721
System (JASC): 2420 · AC Generation System
Part: Control Unit
Part number: 38005041
Condition: Malfunctioned
Location: Ac Bus
Part time: 4,534 hours
Stage of operation: CR
Nature of condition: O
Precautionary procedure: A

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

What was found

CRUISE AT FL 330, APU FAULT LIGHT AND APU OIL PRESSURE LIGHT ILLUMINATED AND APU SHUTDOWN AUTOMATICALLY. REPEAT EVENT. CHECKED APU FAULTS, NONE. CHECKED APU OIL, GOOD. RAN APU, OK FOR SERVICE. CROSSTIE LOCKOUT ON MCO AND PLA. REPLACED A/C BUS CONTROL UNIT. REMOVED MCO AND PLA ON CROSS TIE LOCKOUT.

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