SDR UIEA2018032200451

Service difficulty report · Pressure Switch · Boeing 7673S1

Difficulty date: March 22, 2018
Submitted: March 28, 2018
Operation: Air carrier
Aircraft: N640GT
Make and model: Boeing 7673S1
Aircraft serial: 25221
Aircraft time: 85,175 hours, 18,083 cycles
System (JASC): 2421 · AC Generator-Alternator
Part: Pressure Switch
Part number: 38760483
Part serial: 9742031514U
Condition: Failed
Location: Generator
Stage of operation: IN
How discovered: O
Nature of condition: J
Precautionary procedure: K

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

What was found

APU AUTO SHUTDOWN, GENERATOR FILTER MESSAGE ON ECU. PERFORMED FIM 49-11, FT 969, NO FAULTS NOTED, IAW AMM 49-27-03 REMOVED AND REPLACED THE GENERATOR SCAVENGER FILTER. REMOVED AND REPLACED GEN PRESSURE DIFFERENTIAL SWITCH IAW AMM 49-20-07. APU OPS CHECKED NORMAL.

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